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Poor response rate, self-selection bias, and item noncompletion negatively impact the generalization of results from surveys. This study examined differences in these factors between a paper and online survey among allied health clinicians. Clinicians within a large local health district were initially invited to complete the Research Capacity in Context Tool online via an e-mail link. Following a lower-than-expected response rate, potential selection bias, and item noncompletion, the survey was readministered in paper form to the same cohort of clinicians 6-12 months later. The response rate to the paper survey was higher than to the online survey (27.6% vs. 16.5%). Selection biases were evident, characterized by seniority and discipline: Junior clinicians responded at rates significantly less than expected to the online survey but as expected to the paper survey. Occupational therapists, speech pathologists, and podiatrists responded more highly to the online survey, while other disciplines responded more highly to the paper survey. The rate of item noncompletion was higher for online than paper survey (6.72% vs. 3.8% questions not completed, respectively), with patterns of noncompletion also differing. These data suggest paper surveys are likely to produce less biased and more generalizable data from allied health clinicians. [ABSTRACT FROM AUTHOR]

Background: Previous research has found that a "web-push" approach to data collection, which involves contacting people by mail to request an Internet survey response while withholding a paper response option until later in the contact process, consistently achieves lower response rates than a "paper-only" approach, whereby all respondents are contacted and requested to respond by mail.Method: An experiment was designed, as part of the Millennium Cohort Family Study, to compare response rates, sample representativeness, and cost between a web-push and a paper-only approach; each approach comprised 3 stages of mail contacts. The invited sample (n = 4,935) consisted of spouses married to U.S. Service members, who had been serving in the military between 2 and 5 years as of October, 2011.Results: The web-push methodology produced a significantly higher response rate, 32.8% compared to 27.8%. Each of the 3 stages of postal contact significantly contributed to response for both treatments with 87.1% of the web-push responses received over the Internet. The per-respondent cost of the paper-only treatment was almost 40% higher than the web-push treatment group. Analyses revealed no meaningfully significant differences between treatment groups in representation.Conclusion: These results provide evidence that a web-push methodology is more effective and less expensive than a paper-only approach among young military spouses, perhaps due to their heavy reliance on the internet, and we suggest that this approach may be more effective with the general population as they become more uniformly internet savvy. [ABSTRACT FROM AUTHOR]

Historic parchment is a complex biological material, and due to various methods of production or inks used, unknown environmental histories of objects and heterogeneous nature of animal skin, it represents a particular analytical challenge. Due to the number of variables it is likely that patterns in degradation of these historic objects can only be revealed by surveying the material properties of a significant number of real objects. In this work, a sacrificial collection of ca. 100 historic parchments (fifteenth to twentieth century) was characterized using a range of techniques available to conservation practitioners that can usefully be used to reliably and rapidly characterize parchment. We focused on micro-destructive methods, such as shrinkage temperature ( Ts), as the most widely used indicator of parchment degradation. Lipid content, roughness, and ink pH were additionally measured, while a limited number of samples containing iron gall ink were also examined using scanning electron microscopy (SEM) and SEM-EDX, to explore the distribution of ink components. Even in the absence of detailed environmental histories, it is possible to acknowledge the significance of the effect of iron gall ink and its acidity, and of lipids on parchment degradation, as measured using Ts. This research reports valuable reference data, while the collection remains accessible for further research. [ABSTRACT FROM AUTHOR]