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This paper argues why children with Mathematical Learning Disabilities (MLD) do not form a unitary group. Instead, they should be regarded as individuals with unique profiles of strengths and weaknesses that explain their mathematical difficulties. To build this argument, we shortly recapitulate the research on MLD, which has mainly been focused on characterizing the group of children with MLD--as compared to control groups. However, these general characteristics are not applicable to all children with MLD. Furthermore, attempts to define separate, relevant subgroups merely failed. Based on some recent studies, we show how individual profiles of strengths and weaknesses might help in understanding the specific mathematical difficulties of a child. We propose a new multidimensional framework of MLD, in which both strengths and weaknesses are recognized. We argue that both research and practice are in need of further research that takes individual differences into account.

The present study investigated the compensatory role of verbal learning and consolidation in reading and spelling of children with (N = 54) and without dyslexia (N = 36) and the role of verbal learning (learning new verbal information) and consolidation (remember the learned information over time) on the response to a phonics through spelling intervention of children with dyslexia. We also took phonological awareness, rapid automatized naming, verbal working memory, and semantics into account. Results showed that children with dyslexia performed better in verbal learning and equal in verbal consolidation compared to typically developing peers. Regression analyses revealed that verbal learning did not predict reading but did predict spelling ability, across both groups; verbal consolidation did not predict reading, nor spelling. Furthermore, neither verbal learning nor verbal consolidation was related to responsiveness to a phonics through spelling intervention in children with dyslexia. Verbal learning may thus be seen as a compensatory mechanism for spelling before the intervention for children with dyslexia but is beneficial for typically developing children as well.

Cultures could influence parents in the way they perceive adverse situations and in how external factors influence resilience, which in turn, may differentially affect the quality of life of a child. The present study aimed to examine the associations between different dimensions of parental resilience and the quality of life of children in Indonesia. The samples consisted of 497 families. This study used the Parenting Resilience Elements and the Quality of Life Questionnaire. Parental resilience consists of three dimensions, knowledge of child's characteristics, positive perception of parenting, and perceived social support. Knowledge of child's characteristics, one of the parental resilience dimensions, significantly related to the Quality of Life dimensions of communication and influence, and development. Positive perceptions of parenting related to socio-emotional well-being. Perceived social support related to material well-being, activity, and socio-emotional well-being. We found that the parental resilience related to Quality of Life of children with developmental disabilities. Some findings could be unique for a collectivist culture and highlight the complexities of the association between different factors of parent resilience and Quality of Life of children with developmental disabilities in Indonesia.

We examined the response to a phonics through spelling intervention in 52 children with dyslexia by analyzing their phonological, morphological, and orthographical spelling errors both before and after the intervention whereas their spelling errors before the intervention were compared with those of 105 typically developing spellers. A possible compensatory role of semantics on the intervention effects was also investigated. Results showed that before the intervention, children with dyslexia and the typically developing children both made most morphological errors, followed by orthographic and phonological errors. Within each category, children with dyslexia made more errors than the typically developing children, with differences being largest for phonological errors. Children with dyslexia with better developed semantic representations turned out to make less phonological, morphological, and orthographic errors compared with children with dyslexia with less developed semantic representations. The intervention for children with dyslexia led to a reduction of all error types, mostly of the orthographic errors. In addition, semantics was related to the decline in phonological, morphological, and orthographic spelling errors. This study implicates that semantic stimulation could benefit the spelling development of children at risk for or with dyslexia.

Background: Executive functions have been proposed to account for individual variation in reading comprehension beyond the contributions of decoding skills and language skills. However, insight into the direct and indirect effects of multiple executive functions on fifth-grade reading comprehension, while accounting for decoding and language skills, is limited. Aim: The present study investigated the direct and indirect effects of fourth-grade executive functions (i.e., working memory, inhibition, and planning) on fifth-grade reading comprehension, after accounting for decoding and language skills. Sample: The sample included 113 fourth-grade children (including 65 boys and 48 girls; Age M = 9.89; SD = 0.44 years). Methods: The participants were tested on their executive functions (working memory, inhibition and planning), and their decoding skills, language skills (vocabulary and syntax knowledge) and reading comprehension, one year later. Results: Using structural equation modelling, the results indicated direct effects of working memory and planning on reading comprehension, as well as indirect effects of working memory and inhibition via decoding (X[superscript 2] = 2.46). Conclusions: The results of the present study highlight the importance of executive functions for reading comprehension after taking variance in decoding and language skills into account: Both working memory and planning uniquely contributed to reading comprehension. In addition, working memory and inhibition also supported decoding. As a practical implication, educational professionals should not only consider the decoding and language skills children bring into the classroom, but their executive functions as well.

We examined the response to a phonics through spelling intervention for children with developmental dyslexia in word and pseudoword reading efficiency and word spelling. Furthermore, we investigated to what extent the response to the intervention is robust across different cognitive profiles (phonological awareness, rapid automatized naming, and working memory). A group of 54 Dutch children, diagnosed with developmental dyslexia, received a phonics through spelling intervention that combined reading and spelling instruction and practice in a systematic way. An equal amount of time was spent on reading and spelling. Compared with norms within a normal population, positive effects were established for word and pseudoword reading efficiency and word spelling from pretest to posttest. The individual variation in phonological awareness, rapid automatized naming, and verbal working memory did not significantly influence the progress in reading and spelling children made during the phonics through spelling intervention. It can thus be concluded that a combined reading and spelling intervention is beneficial for word and pseudoword reading efficiency and word spelling in children with developmental dyslexia notwithstanding their cognitive profiles. Although promising results were found, this study also showed the persistence of spelling but even more so of reading problems after an intervention among children with dyslexia.

Background: The lexical quality hypothesis proposes that successful reading comprehension requires high quality lexical representations, which allow for efficient retrieval. These retrieval operations have however not been specified. Methods: We investigated the contribution of semantic retrieval to reading comprehension in 119 Dutch children in the upper grades of primary school, while taking decoding skills and vocabulary size into account in a longitudinal design. By using verbal fluency tasks, we measured retrieval in line with the structural organisation of the mental lexicon and additionally, a more controlled search through the mental lexicon. Results: Semantic retrieval assessed in grade 5 accounted for variance in reading comprehension in grade 6, in addition to variance accounted for by vocabulary size and reading comprehension in grade 5. Conclusions: The ability to search through the mental lexicon, along the lines of its hierarchical structure, is important for children's reading comprehension development in the upper primary grades.

We examined the role child factors on the acquisition and transfer of learning the control of variables strategy (CVS) via instruction or self-discovery. Seventy-six fourth graders and 43 sixth graders were randomly assigned to a group receiving direct CVS instruction or a discovery learning group. Prior to the intervention, cognitive, scientific, and linguistic child factors were assessed. Acquisition and transfer of CVS knowledge were measured before and after intervention. Outcomes showed that CVS acquisition and transfer learning gains were higher for the instruction group than for the discovery group. Variation in CVS acquisition learning gains was explained by CVS pretest, verbal reasoning skills, and reading comprehension in the discovery group only. Variation in transfer gains were explained by vocabulary in the instruction group and by CVS prestest, verbal reasoning, vocabulary, and reading comprehension in the discovery group. It can be concluded that instruction provides a more effective method for learning CVS since individual differences in the instruction group played a marginal role explaining CVS posttest. However, since individual differences in linguistic ability account for variation in CVS learning gains discovery learning, these should be taken into consideration when teaching CVS in a more discovery-based manner.

The home numeracy environment (i.e., parents' numeracy expectations and activities), is related to early numeracy in young children. As recent studies have shown that both cognitive and linguistic factors play an important role in predicting numeracy development, it may be assumed that rather than the home "numeracy" environment, the home "literacy" environment predicts early numeracy. The present study examined this hypothesis by focusing on the specificity of the home numeracy environment. In a sample of 60 kindergartners, we assessed cognitive (nonverbal reasoning, working memory) and linguistic abilities (phonological awareness, grammatical skills), as well as early numeracy skills, while exploring their home literacy environment and home numeracy environment from parent questionnaires. We found that home numeracy environment predicted early numeracy skills, after controlling for child factors and home literacy environment. The home numeracy environment can be seen as a unique factor in the home environment in predicting numeracy outcomes.

The present study investigated the role of both cognitive and linguistic predictors in basic arithmetic skills (i.e., addition and subtraction) in 69 first-language (L1) learners and 60 second-language (L2) learners from the second grade of primary schools in the Netherlands. All children were tested on non-verbal intelligence, working memory, phonological awareness, grammatical ability as well as basic arithmetic skills. The L2 learners scored lower than L1 learners on phonological awareness, grammatical ability, and basic arithmetic skills (i.e., addition and subtraction), but not on non-verbal intelligence and working memory. For both groups, the same precursors applied to the variation in basic arithmetic skills. In addition to non-verbal intelligence and working memory, both phonological awareness and grammatical ability predicted basic arithmetic skills, indicating that assessment of arithmetic problems in L1 learners and L2 learners should take into account the cognitive and linguistic abilities that children bring to the classroom.

The present study examined the relations between home numeracy experiences (i.e., parent-child numeracy activities and parents' numeracy expectations) and basic calculation skills (i.e., addition and subtraction) of children with Specific Language Impairment (SLI) and their peers with Normal Language Achievement (NLA), while taking into account their cognitive and linguistic capacities. Fifty children with SLI and 100 children with NLA were tested on cognitive, linguistic, and basic calculation skills, and their parents filled in questionnaires on home numeracy activities and numeracy expectations. The results showed parents of children with SLI report engaging in fewer numeracy-related activities and have lower numeracy expectations for their children than parents of children with NLA. Furthermore, parent-child numeracy activities were more strongly associated with addition and subtraction for children with SLI. It is thus especially important that parents of children with SLI are made aware of their important role in the development of their child's basic calculation skills. (Contains 4 tables.)

The present study investigated the influence of home numeracy experiences on early numeracy skills in kindergarten after controlling for cognitive and linguistic precursors. Eighty-nine children (mean age=6.1 years) were tested on cognitive, linguistic, and early numeracy skills, and their parents completed a questionnaire on home numeracy practices and expectations. The results showed a unique contribution of parent-child numeracy activities and parents' numeracy expectations on early numeracy outcomes next to individual child factors (i.e., early literacy skills and grammatical ability), stressing the importance of home numeracy experiences on early numeracy skills. (Contains 4 tables.)

The present study investigated the role of naming speed in predicting the basic calculation skills (i.e., addition and subtraction) of kindergartners with Specific Language Impairment (SLI), when compared to a group of Normal Language Achieving (NLA) children. Fifty-three kindergartners with SLI and 107 kindergartners with NLA were tested on cognitive, linguistic and basic calculation skills. The results showed that phonological awareness, grammatical ability, general intelligence and working memory accounted for the variation in the basic calculation skills of both groups. However, an additional effect of naming speed on both addition and subtraction was found for the group of children with SLI, suggesting that naming speed may act as a clinical marker in identifying those children who are likely to develop problems in basic calculation skills. (Contains 1 figure and 2 tables.)

The present study investigated the role of cognitive and linguistic precursors to early numeracy skills to examine the interrelations between the development of linguistic and numeracy skills. General intelligence, working memory, phonological awareness, grammatical ability, and early numeracy skills were assessed in 75 first (mean age 6.1) and 55 second language learners (mean age 6.2). The second language learners scored lower than the first language learners on both linguistic and early numeracy tasks. However, the same precursors accounted for the variation in the early numeracy of both groups as no structural differences were found between the two groups. A more elaborate model of the acquisition of early numeracy is presented indicating that in the earlier years of childhood the acquisition of early numeracy skills is highly related to linguistic skills. (Contains 4 figures and 4 tables.)

The present study investigated the differences in learning gain when performing a WebQuest with a well-defined versus an ill-defined assignment. Twenty boys and twenty girls (mean age 11; 10), attending a special primary education school, performed two WebQuests. In each WebQuest, they performed either a well-defined or an ill-defined assignment. Knowledge acquisition was assessed by means of a concept map (ie, associative knowledge) and a knowledge test, based on facts concerning the subject (ie, factual knowledge). Results indicated that the learning gain on both WebQuests was higher for participants who worked on the ill-defined assignments. In the long term, factual knowledge remained intact. The results of this study indicated that the use of WebQuest can be a valuable tool to enrich the educational curriculum in special education.

The present study investigated to what extent children with specific language impairment (SLI) differ in their early numeracy skills, when compared to normal language achieving (NLA) children. It was also explored which precursors were related to the early numeracy skills in both groups. Sixty-one children with SLI (6; 1 years) and 111 NLA children (6; 2 years) were assessed on general intelligence, working memory, naming speed, linguistic ability and early numeracy skills. The results showed lower scores for the children with SLI on logical operations and numeral representations but not on numeral estimations. The variance in numeral estimations was explained by children's intelligence and visual spatial memory. Phonological awareness and grammatical ability explained the variance in logical operations and numeral representations whereas naming speed turned out to be an additional factor in predicting these early numeracy skills of children with SLI. (Contains 4 tables.)

The present study explored the direct and indirect contribution of semantic abilities to the levels of phonological and orthographic abilities in children with dyslexia. The semantic abilities of fifty‐five 9‐year‐old Dutch children diagnosed with dyslexia were associated with their phonological abilities (phonological awareness, rapid naming, and verbal working memory) and their word decoding and pseudoword decoding efficiency scores. It was found that children's semantic abilities predicted both word decoding efficiency and pseudoword decoding efficiency indirectly via phonological awareness and rapid naming. These results can be explained in terms of a lexical restructuring account of early reading development; strong semantic abilities provide children with dyslexia with a boost to strengthen their phonological skills and naming skills, which indirectly facilitate their reading development. [ABSTRACT FROM AUTHOR]