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Managing and analysing large qualitative datasets pose a particular challenge for researchers seeking a consistent and rigorous approach to qualitative data analysis. This paper describes and demonstrates the development and adoption of a matrix tool to guide the qualitative data analysis of a large sample (N = 122) of interview data. The paper articulates the theoretical and conceptual underpinnings of the matrix analysis tool and how it was developed and applied in a longitudinal mixed methods out-of-home-care research study. Specific illustrations and examples of data integration and data analysis are provided to demonstrate the benefits and potentials of constructing matrix tools to guide research teams when working with large qualitative data sets alone or in combination with quantitative data sets. [ABSTRACT FROM AUTHOR]

Retaining participants in longitudinal studies is important but challenging when retracing them after a substantial gap between study phases. Utilising our nine year mixed-methods longitudinal study of 54 families affected by paternal imprisonment, we qualitatively analysed our processes and experiences of retracing participants after a seven year gap in contact. Paying attention to the spatio-temporal features that are traditionally an analytical focus of qualitative longitudinal research helped to enhance our retention rates, and our fieldwork strategies can be more deeply understood as part of the 'timescape' of qualitative longitudinal research. In this paper, we describe the spatio-temporal contours that shaped our efforts, successes and failures, and distil the material practices that they led to during our 'tracking treks' through the timescape of longitudinal fieldwork. [ABSTRACT FROM AUTHOR]

The COVID-19 pandemic has created unprecedented challenges for social research. However, little is known about the impact of social distancing measures on research with hard-to-reach populations. This paper provides methodological reflections on the efficacy of socially distanced recruitment and interviewing methods for research with disabled young people, drawing on our experience from the Educational Pathways and Work Outcomes longitudinal study, which started in March 2021 during the third national lockdown in England. We discuss difficulties in gaining access to disabled young people and argue that the pandemic has exacerbated longstanding barriers implicated in the recruitment of hard-to-reach populations who are typically seen as vulnerable by gatekeepers. In contrast, our experience suggests that flexible online/virtual interviews can overcome pitfalls inherent in the face-to-face interviewing of disabled young people and could therefore be utilised to make their voices heard in a variety of contexts and scenarios after the end of the ongoing pandemic. [ABSTRACT FROM AUTHOR]

In this paper, we examine the use of creative methods for understanding the experience of young adults aged between 16 and 30 years over a year following a cancer diagnosis. Exploring the renegotiation of identity, the narrative, longitudinal research design of the study demonstrated the unfolding process of the narrative work between participants and researcher. We used a combination of visual, spoken and reflexive psychosocial approaches to understand emergent narratives, many of which do not always find symbolisation in language. Our methodological approach focused on the difficult and sometimes 'unspeakable' nature of the young adults' narratives, demonstrating the importance of different modes of communication in articulating complicated relations with uncertain futures. In this respect the links between narrative, social action and the imagining of possible futures are precarious. In this paper, we explore how untellable issues were explored, and the challenges of doing so. [ABSTRACT FROM AUTHOR]

This paper outlines the state of the art in qualitative longitudinal methodology, reflecting on more than 10 years of development since a previous special issue on qualitative longitudinal research was published by theInternational Journal of Social Research Methodologyin 2003. The papers presented in this special issue emerge from a methodological innovation network that brought together an international community of researchers in order to map new frontiers for the method. This paper summarises the development of the method from a design to a sensibility, identifying three new frontiers as part of a future research agenda including: the need for a processual imaginary; experimentation with temporal perspectives and orientations and explicating the temporal affordances of our methods. [ABSTRACT FROM PUBLISHER]

Forming part of the new ‘methodological frontier’ the use of digital communication technologies has become increasingly commonplace in social research. Whilst audio-only online interviews and asynchronous means of communicating online has been discussed for over two decades, video capabilities; being able to see a participant face-to-face online (e.g. via Skype, Face Time, Google Hangouts) is a much more recent phenomenon. Discussion of such new opportunities has tended to centre on the practicalities and technicalities. Alternatively, this paper moves beyond the recent empiricist focus to reflect critically on the implications of using internet video calls on methodological matters of importance to qualitative (longitudinal) researchers. Drawing on a long-standing qualitative longitudinal study following lives of over 50 young people, the paper focuses on the potentials and pitfalls for rapport of using internet video calls for qualitative interviewing. The findings have resonance for short-term studies, and longitudinal endeavours. [ABSTRACT FROM PUBLISHER]

This paper examines the temporal and ethical affordances of commercial social media platforms, such as Twitter, as tools for engaging in social research and knowledge exchange. Drawing on activity that took place during theNew Frontiers in Qualitative Longitudinal Researchseminar series, the article reports on using Twitter and other social media platforms to document, share and archive ‘data’ from a series of research events. It also experiments with new modes of research writing, using fragments of ‘data’ from Twitter to distil research knowledge and ideas, whilst also capturing the pace and form of this live method of social documentation and knowledge exchange. Bringing together conversations within digital sociology about how to ‘do’ time in digital research, with methodological debates among qualitative longitudinal researchers about how to research social and biographical continuity and change, the paper argues that the presentist focus in digital research is far from inevitable. Attending to time in digital media demands that we are alert to questions of authorship, audience and co-production, recognizing the labour of research and the provenance of research knowledge, ‘data’ and ideas. [ABSTRACT FROM PUBLISHER]

Collecting biological data in representative surveys is becoming more common due to their potential to inform research and policy. Nevertheless, using nurses to collect these data can lead to unintended effects. In this paper, we investigate how nurses influence the non-response process by looking at five waves of data coming from two surveys in the UK: Understanding Society and the English Longitudinal Study of Ageing. We find that nurses explain between 5 and 14% of the variance in non-response to biological data collection. We also find that older nurses are more successful in obtaining cooperation and consent to biological data collection and nurses with more survey experience are more likely to successfully collect blood samples. Finally, we show that including nurse characteristics in non-response weighting models leads to modest changes in population estimates of biological markers. [ABSTRACT FROM AUTHOR]

Missing data (attrition and non-response) are a feature of most surveys especially longitudinal/panel studies. And many such studies now have multilevel designs and hence multilevel data structures. Recent advances in imputation methodology now offer social researchers opportunities to address issues of missing data in a statistically principled way. Paradata can offer great insights in understanding the nature and causes of missingness and can be used to construct auxiliary variables to be included in imputation models. In this paper we present multilevel multiple imputation which has recently extended MI to incorporate multilevel data, making it a flexible and robust strategy for many research settings. We illustrate the procedures by analysing data drawn from a longitudinal study of prisoners. We show how paradata of that study was instrumental in guiding our approach and subsequent analysis. [ABSTRACT FROM AUTHOR]

In recent years, the Australian government has encouraged open access to administrative data, providing new opportunities for examining life course pathways and evaluating social policies. This paper demonstrates the importance of establishing partnerships in the use of administrative data for social research. In collaboration with the data custodian, we used administrative welfare data to investigate a policy-relevant topic: the association between income support receipt and relationship separation. Our results provided greater statistical power for detecting associations for minority groups than is possible with panel survey data, highlighting the benefits of administrative data for understanding the outcomes of population groups that are not well represented in surveys. The collaboration between university researchers and data custodians was critical to enable appropriate sharing of data for research and for accurate interpretation of the data and outcomes for relevance to policy. [ABSTRACT FROM AUTHOR]

Issues of time and change are foregrounded in qualitative longitudinal research (QLL1) and are considered here in the context of contemporary fatherhood. From a wider sample of 46 men interviewed as part of the QLL Timescapes network, we draw on two case studies of men who became fathers for the first time in 2000. This paper considers the men's relationship to involvement and the linked concepts of exclusion and redundancy, terms which emerged from the data and changed over time in the men's accounts. We seek to emphasise the value of QLL methods for providing a more complex understanding of the lived experience of life transitions and their longer-term implications, contrasting this with existing studies offering a 'snapshot' approach. [ABSTRACT FROM AUTHOR]

This paper describes a multi-method approach to data collection used in a large-scale seven-year longitudinal study of the effect of class size differences on classroom processes. There were five main types of process and the paper concentrates on the results from one of these: teaching interactions with pupils. It was felt that integration of results from quantitative and qualitative methods would help reconcile inconsistencies and limitations in previous research on this topic. Quantitative information was collected from systematic classroom observations and teacher completed time estimates to address relationships between class size and teacher time allocation, and teacher and pupil behaviour in class. But we also wanted a more qualitative assessment of relationships between class size and teaching through the use of methods that captured practitioners’ experiences, and through detailed case studies. Examples of integrated results from these four methods are given, along with some reflections on lessons learned. [ABSTRACT FROM AUTHOR]

This paper explores the process of going back in qualitative longitudinal research (QLR) to gather later accounts of unfolding personal experiences. The design of interview-based QLR is usually premised on collecting data, over-time, around an unfolding experience or event. This design facilitates the establishment of an on-going research relationship and ‘rapport’ and the accessing of fluid and time-sensitive accounts of individual experiences, leading to more nuanced understandings of temporal subjectivities. However in practice maintaining a sample in QL research, which may span a number of years, can be challenging and the process of going back, complicated. This paper reflects on issues and responsibilities which can arise when researchers try to access and go back to participants, especially where experiences once optimistically narrated and future-oriented have unfolded in unplanned and personally unwelcome ways. Using researcher experiences and the data from later phases of two UK based QLR studies on transition to first-time motherhood and first-time fatherhood, the practical steps of maintaining contact, reconnecting with participants and going back are documented. How does the passage of time and changes in participant’s lives alter research relationships, interpretations of data and researcher responsibilities? [ABSTRACT FROM PUBLISHER]

This paper draws on data from Young Lives, a longitudinal study of childhood poverty, to explore how international development research might be strengthened by including qualitative longitudinal research (QLR). We review three problems in development studies: (a) the relatively low status of qualitative research within the hierarchy of development knowledge, (b) the predominance of cross-sectional research, and, (c) marginality of research with children and young people. We offer examples from Young Lives research on early marriage in Ethiopia, household poverty dynamics in India and Ethiopia, and aspirations and migration in Peru, to highlight the potential of QLR to address these drawbacks. We suggest that QLR illuminates the dynamic complexities of the processes and practices of everyday life, how they are experienced by children and young people, the responses they make, and the shifting trajectories of their lives. [ABSTRACT FROM AUTHOR]

Presents an introduction to the July 23, 2003 issue of the periodical "International Journal of Social Research Methodology."

Collecting multiple perspectives data (e.g. from related individuals) in a qualitative longitudinal design can provide rich understanding of the dynamics at play in complex relational systems, and the different perceptions of people involved. However, such approaches are inherently challenging due to the complexity and volume of data involved. So far, little attention has been paid to the methodological challenges of data analysis in multiple perspectives longitudinal research. This paper contributes to the development of a systematized analysis process for multiple perspectives qualitative longitudinal interviews (MPQLI). We present a framework for handling the complexity and multi-dimensionality of MPQLI, describing discrete steps in such analyses, and related aims and insights. We exemplify the suggested strategies with our own research on the transition to parenthood. The proposed framework can increase both traceability and credibility of analysis of MPQLI, and help to realize the potential of multiple perspectives longitudinal interviews. [ABSTRACT FROM PUBLISHER]

Embedded within quantitative longitudinal panel or cohort studies is narrative potential that is arguably untapped but might enrich our understanding of individual and social lives across time. This paper discusses a methodology to assemble the life history narratives of families using social work by drawing on quantitative data from the British Household Panel Survey. It explores whether this person-centred approach helps us to understand the counter-intuitive results of a parallel multivariate analyses, which suggest that families using social work fare worse than similar others over time. Our findings are tentative, due to the experimental use of this narrative method and the limits of social work information in the data-set. Nonetheless, the life histories presented bring to light complexities, diversity and the non-linear pathways between families’ needs, support and outcomes that the aggregates obscure. We conclude that reconstructing families’ lives in this way, especially in the absence of complementary longitudinal qualitative data, affords the wider opportunity to interrogate and better understand the findings of quantitative longitudinal studies. [ABSTRACT FROM PUBLISHER]

Demographic data, such as highest level of education attained, are often assumed to be relatively free from measurement error. As part of an evaluation of an early childhood parenting intervention, 654 parents reported their highest level of education via telephone interview at baseline and self-directed questionnaire at follow-up 5.7 years later. At follow-up, 14% reported a lower level of education compared to baseline, indicating measurement error in one of the data collections. Comparison with data collected by an external agency for a subsample of participants (n = 261) 3.2 years after baseline indicated error in both the baseline and follow-up data. Probable causes of error included respondent and interviewer confusion regarding the names of post-school qualifications and item construction incorrectly implying linear pathways through education. We make recommendations around question construction and data collection methods for reducing measurement error in self-reported educational attainment. [ABSTRACT FROM AUTHOR]

This paper describes a UK based longitudinal qualitative study following approximately 100 young people over 9 years. It provides an overview of the research design, methods of data collection and analysis as well as reflecting on the strengths and weaknesses of the strategies employed. We focus on the value of a devolved research design, complementary cross-section and temporal analytic approaches and the effects of being involved in a longitudinal study on researchers and participants. The paper aims to contribute to a growing understanding of the practical, ethical and epistemological challenges presented by longitudinal qualitative methods, and highlights those challenges that are specific to this method as well as those which are amplified by this kind of approach. [ABSTRACT FROM AUTHOR]

This paper reviews the utility of the framework offered by Giddens' 1991 work Modernity and Self Identity: Self and Society in a Late Modern Age , for the analysis of longitudinal qualitative studies. Working from two different longitudinal qualitative data sets, the authors explore the extent to which the notion of the 'reflexive project of self' and associated concepts might be operationalized to assist with the analysis and interpretation of empirical data. We first explore the notion of 'fateful moments' in a longitudinal qualitative interview-based study of young people's biographies. We then explore the importance of mechanisms of 'shame' as accompaniment to dramatic life transition, using data taken from a 3-year study of female sex workers in New Zealand. The paper concludes by arguing that although Giddens' work provides us with an interesting starting point and some useful operational tools, in practice the data outgrow the theory. [ABSTRACT FROM AUTHOR]

Multiple imputation (MI), a two-stage process whereby missing data are imputed multiple times and the resulting estimates of the parameter(s) of interest are combined across the completed datasets, is becoming increasingly popular for handling missing data. However, MI can result in biased inference if not carried out appropriately or if the underlying assumptions are not justifiable. Despite this, there remains a scarcity of guidelines for carrying out MI. In this paper we provide a tutorial on the main issues involved in employing MI, as well as highlighting some common pitfalls and misconceptions, and areas requiring further development. When contemplating using MI we must first consider whether it is likely to offer gains (reduced bias or increased precision) over alternative methods of analysis. Once it has been decided to use MI, there are a number of decisions that must be made during the imputation process; we discuss the extent to which these decisions can be guided by the current literature. Finally we highlight the importance of checking the fit of the imputation model. This process is illustrated using a case study in which we impute missing outcome data in a five-wave longitudinal study that compared extremely preterm individuals with term-born controls. [ABSTRACT FROM PUBLISHER]

When performing data linkage, survey respondents need to provide their informed consent. Since not all respondents agree to this request, the linked data-set will have fewer observations than the survey data-set alone and bias may be introduced. By focusing on the role that survey design features play in gaining respondents’ consent, this paper provides an innovative contribution to the studies in this field. Analysing experimental data collected in a nationally representative household panel survey of the British population, we find that interview features such as question format (dependent/independent questions) and placement of the consent question within the questionnaire have an impact on consent rates. [ABSTRACT FROM AUTHOR]

This paper presents a case study to illustrate the range of decisions involved in designing a sampling strategy for a complex, longitudinal research study. It is based on experience from the Young Lives project and identifies the approaches used to sample children for longitudinal follow‐up in four less developed countries (LDCs). The rationale for decisions made and the resulting benefits, and limitations, of the approaches adopted are discussed. Of particular importance is the choice of sampling approach to yield useful analysis; specific examples are presented of how this informed the design of the Young Lives sampling strategy. [ABSTRACT FROM AUTHOR]

The Effective Provision of Pre-school Education (EPPE) project is a longitudinal study of young children between the ages of 3 and 7 years. Research began in 1997 and both quantitative and qualitative methods were used to explore the effects of pre-school education on children’s attainment and social/behavioural development at entry to school, and of any continuing effects on such outcomes at the end of Key Stage 1 (age 7). The sample included over 3,000 children and 141 pre-school centres drawn from six different types of providers. In addition, a home sample of children who had not attended a pre-school centre was included. In order to identify the processes that might influence centre effectiveness, observational data were collected and centre managers interviewed. In-depth case studies of 12 more effective centres were used to explore and illuminate the processes, particularly in relation to pedagogy, associated with better child outcomes. A mixed method approach was adopted to simultaneously answer both confirmatory and exploratory questions, to support user engagement and provide triangulation. The paper argues that the mixed method approach supported the development of stronger research inferences. [ABSTRACT FROM AUTHOR]

This paper discusses a longitudinal, interview-based study of Australian secondary school students that explores the interaction between school ethos and forms of subjectivity. The study was designed to enable prospective and retrospective understandings of identity over time. It is suggested that this methodology encourages a reflexive self-positioning for both participants and researchers and, in the accumulation of an archive of perspectives, responds to poststructuralist critiques of contingency and construction in research interviews. Second, it is argued that the richness of longitudinal research invites more than one kind of analysis, and that working with and across conventionally divergent theoretical approaches can be fruitful. This is discussed with reference to Bourdieu's account of social field and habitus, and Hollway and Jefferson's notion of the 'defended subject'. [ABSTRACT FROM AUTHOR]

In this paper we explore the implications of conducting a longitudinal transitions study based on ethnographic research in secondary schools. The main issue we address is how the ethnographic starting point materialized into a longitudinal exploration of young people's transitions to adulthood. We discuss the process of the research and how the ethnographic study contextualizes the life history research, focusing on 'remembering' and 'imagining'. In our conclusions we address representations, in particular ethics and politics of writing. The article draws from a project Tracing Transitions--Follow-up Study of Post-16 Students in which we trace young people's transitions into further and higher education and the labour market. [ABSTRACT FROM AUTHOR]

The longitudinal Belfast Youth Development Study (BYDS) followed a group of young people from age 11 to 21 years (from 2001 to 2011), charting their experiences of substance use, offending, education, and peer and family relationships. This allowed the investigation of risk and protective factors associated with different types of behavioural patterns and outcomes in adolescence and emerging adulthood. A feasibility study was carried out from 2018 to 2019 to test the success rate of electronically tracing 4,195 participants after almost a decade, in anticipation of carrying out an additional wave of data collection. The projected trace rate obtained using standard and forensic electronic tracing methods was considerably higher (86%) than traditional tracing methods (10%) for getting up-to-date contact details on participants. The electronic tracing methods were also cheaper (£9.72 per person traced) than traditional tracing methods (£20.62 per person traced). These findings will help maximise the potential of longitudinal social research. [ABSTRACT FROM AUTHOR]

Anonymisation processes are an embedded, if contested, element of ethical research practice. Current debates, highlighting various challenges to anonymity, suggest the importance of situated ethics and negotiated solutions. However, the strategies adopted are necessarily mediated by the researcher’s epistemological positions. Longitudinal studies with their extended timeframes and intensive research relationships tend to amplify ethical dilemmas and highlight the contingency and fluidity of ethical processes. Here we explore how temporality intersects with epistemology in a qualitative longitudinal (QL) study of organisations located in a contemporary policy context. We reflect on the confidentiality and anonymity dilemmas that develop and change over time, the strategies adopted and the implications of these for the type of knowledge produced. We suggest that QL studies entail flexibility within epistemological frameworks. These issues have particular resonance and consequences for researchers in light of contemporary pressures around public scrutiny of academic performance and wider debates around public sociology. [ABSTRACT FROM PUBLISHER]

The article discusses various reports published within the issue including one by Ian Plewis on the examination of non-response in the first Millennium Cohort Study (MCS) and another by Kathryn Parkinson, Charlotte Wright and Robert Drewett on their experience in practice of a specialist longitudinal survey on a smaller cohort of children from England.

Participant attrition is a significant challenge for longitudinal studies, particularly those involving disadvantaged populations. We attempted to re-engage n = 990 families in a five-year follow-up of a randomised controlled trial of an early childhood parenting intervention. Tracing was attempted for n = 90/990 (9.1%) uncontactable participants. Evidence for the identification of a matching Facebook profile was classified as strong, moderate or weak. A private message was sent to those with strong evidence (n = 63/90, 70.0%), of which 32 responded, 22 agreed to participate and 19 provided data. Compared to participants engaged using traditional methods, those re-engaged through Facebook were more likely at initial recruitment to have a younger child (p =.02), to be a single parent (p =.04), less educated (p <.001), lower income (p =.01) and in an unemployed household (p <.001). Findings suggest that social media can be an effective engagement tool, helping to minimise overall and selective attrition in longitudinal studies, particularly for hard-to-reach populations. [ABSTRACT FROM AUTHOR]

Mixed methods longitudinal studies continue to be rare, yet have potential for transcending the limits of qualitative and quantitative paradigms. This article compares the life stories of 47 young people generated from a cohort study of 6000 children born in 1995. The cases were sampled through an association between two variables – drug use and leaving school early – generating a four-field table. Comparing the cases within and across each table cells, we question the 'black box' logic that underpins the assumption that cannabis smoking is consequential for educational success. Moving into a qualitative paradigm we reconceptualise the cases as butterflies captured in a net and work deductively to understand the species captured. Culminating with an analysis of a single case over time, we argue that narrative approaches are the starting point for understanding subsequent social action, providing a basis for larger scale quantitative modeling. [ABSTRACT FROM AUTHOR]

This study constitutes the first longitudinal exploration of consent to link survey and administrative data. It examines variations in consent over time and explores the influence of the respondents’ characteristics (both observed and latent) and the impact of the interviewers on consent co-operation. Respondent inclination to consent is modelled as a latent construct. Most respondents behave consistently over time. However, this consistency is not driven by a strong inclination to consent but rather by the circumstances of the respondents at the time of the interview and by the impact of the interviewers themselves. The findings also show that the change in consent behaviour over time is a clear indication that consent should be treated as a dynamic phenomenon at the individual level. [ABSTRACT FROM AUTHOR]

In recent years, the possibilities and pitfalls of qualitative secondary analysis have been the subject of on-going academic debate, contextualised by the growing availability of qualitative data in digital archives and the increasing interest of funding councils in the value of data re-use. This article contributes to, and extends these methodological discussions, through a critical consideration of how the secondary analysis of thematically related qualitative longitudinal (QL) datasets might be utilised productively in qualitative research design. It outlines the re-use of two datasets available in the Timescapes Archive, that were analysed to develop a primary empirical project exploring processes of continuity and change in the context of men’s care responsibilities in low-income families. As well as outlining the process as an exemplar, key affordances and challenges of the approach are considered. Particular emphasis is placed on how a structured exploration of existing QL datasets can enhance research design in studies where there is limited published evidence. [ABSTRACT FROM PUBLISHER]

Attrition represents a significant obstacle to overcome in any longitudinal research project. It is, perhaps, most keenly felt when the data collected are from a qualitative study, since, unlike quantitative longitudinal research, weighting factors cannot be applied to ‘correct’ for any biases in the achieved sample and even a small number of ‘lost’ respondents can equate to a large percentage of the original sample. It is perhaps because of qualitative longitudinal research’s (QLR) reliance on, generally speaking, smaller samples that few have been able to shed much light on which re-contacting procedures are associated with achieving higher rates of retention. In this article, using data from a fifth sweep of a larger but particularly challenging cohort of 199 former probationers, we explore the strategies which helped us maintain high levels of retention in a QLR study. The article contains many practical suggestions which others planning or undertaking similar studies may find useful. [ABSTRACT FROM PUBLISHER]

The Whites Writing Whiteness project is concerned with changes to the racial order in South Africa over a long time-period and connects ‘big numbers’ and work on very large archive collections with close textual analysis of particular documents. It uses longitudinal data within a Qualitative Longitudinal Research methodological approach, combining formal analysis with a sampling process. In operationalizing this, letters from the Findlay Family collection with thousands of documents, a group of around 190 letters by Elizabeth Price, and a small set of Gottlob Schreiner’s letters, are discussed. In doing so, useful conceptual and methodological tools for analysing other large longitudinal datasets are provided. [ABSTRACT FROM PUBLISHER]

Dietary assessment is an important component of longitudinal studies, allowing examination of the role of nutritional factors on health and societal outcomes. Dietary intake can be assessed by a number of methods, varying in respondent and interviewer burden, cost, and detail of type and quantity, as well as frequency of foods consumed. Many longitudinal studies utilise Food Frequency Questionnaires (FFQs) because of ease of administration and low cost, but these lack food detail, rely on good memory and have been questioned in terms of their capability to show diet-disease relationships. Estimated diet diaries are growing in popularity because of lower respondent burden than weighed records yet providing equally valid information, with more detail than FFQs. Costs of coding and translation to nutrients can be built into study budgets; estimated diaries should be considered for longitudinal studies to enable the role of diet in health and lifestyle to be accurately investigated. [ABSTRACT FROM AUTHOR]

The recent establishment of two national, longitudinal studies of contemporary birth cohorts in the UK and USA creates a valuable opportunity for cross-national research on the experiences of young children and their families. This article describes these new datasets and highlights the potential advantages and challenges of their combined use. To illustrate some of the issues involved in comparative research, we describe our study of the patterns and predictors of UK and US mothers' (re)entry into the labour force during infants' first 9 months of life. Similar to previous studies, we find that US mothers engage in paid work much sooner after childbirth than UK mothers. In both samples, greater financial and human capital predict higher rates (and earlier entries) of post-birth employment; however, among the subset of US mothers who were employed pre-birth, it is socioeconomic disadvantage that predicts sooner returns. We consider how different policy environments in the UK and USA help to explain these findings, and discuss directions for future research with these data. [ABSTRACT FROM AUTHOR]

Growing Up in Australia is a national longitudinal study of the development and wellbeing of 10,000 Australian children. The study has been committed since inception to support data linkage to other datasets, to value-add to the primary modes of data collection from parents and others. It can increase the efficiency of data collection by reducing respondent and interviewer burden as well as adding new dimensions to addressing key research questions. The viability of data linkage needs to take into account the relevance of the data for research and policy, as well as data quality and cost, privacy and consent issues and the ease of access. This article documents the various sources for data linkage considered for Growing Up in Australia, including government health and education records, child care accreditation data, and community-level data, and examines the strengths and challenges associated with each. [ABSTRACT FROM AUTHOR]

Longitudinal data are used to explore the reliability of long‐term illness measures using information on ‘long‐term/permanent sickness or disability’ as recorded via the question on economic activity in the Census of England and Wales. Specifically it is asked ‘what evidence is there that individuals answer the item on long‐term sickness or disability in the same way at different time points?’. The research is based on data from the Office for National Statistics Longitudinal Study (LS) and the responses of persons who reported long‐term sickness or disability in 1971 are tracked to see if they also reported long‐term sickness or disability in 1981 and 1991. That a large number of people reported long‐term sickness or disability at three Census points suggests that the measure was reliable. In addition, it is suggested that a degree of content validity has been achieved with respect to the understanding of the concept of ‘long‐termness’. It is concluded that longitudinal data provide a valuable way of investigating the reliability and validity of frequently used categorical measures and can help to distinguish between the extent to which a phenomenon such as long‐term sickness is ‘new’ or ‘ongoing’. [ABSTRACT FROM AUTHOR]

This article discusses the psychosocial perspective in a longitudinal study of transitions to womanhood. Project 4:21 spanned a period of immense transformation in Great Britain and enabled to trace the impact of a transformed industrial landscape as well as educational, social and welfare policies in the 1970s and 1980s. The "Right to Buy" act of 1979, which allowed tenants of public housing to buy the properties they lived in, was a defining piece of legislation politically and personally. Sections of the left at the time were opposed to this policy and highly judgmental of council accommodation tenants who took advantage of it. But by listening to the working-class families' stories it was clear that they did not want to reject the welfare state, nor were they greedy, nor prey to false ideology. Most simply wanted a better life for themselves and their children. It's not surprising that buying a house was not talked about as anything like such a significant event in the middle-class families; after all, property ownership had been for most of them a fact of their family histories. But for working-class families who lived on rundown council estates, this legislation represented their one and only chance to move out of those places which were discursively constructed through notions of deviance, deficit and failure, in an attempt to tell a different story about themselves.

This article discusses issues of methodological warrant in a qualitative, longitudinal study with only a small number of subjects. The 12 to 18 Project was designed to contribute to research on gender, class and schooling. The rationale for a design using only 26 students spread between four schools is explained. It is argued that even with small-number research, issues of selection and comparison are important--but emphasis on techniques of data-treatment and comparison is misplaced. The meaningfulness and contribution of studies of this type lie in multiple acts of design, comparison, reflexive interpretation and dialogue with the broader field, and the more that such studies emphasize technical analytic procedures, the more they undermine their warrant to be anything other than a report on a small sample. Illustrations of interpretations of the data and from the data are given. [ABSTRACT FROM AUTHOR]