Objective: ADHD and autism are complex and frequently co-occurring neurodevelopmental conditions with shared etiological and pathophysiological elements. In this paper, we attempt to differentiate these conditions among the young people in terms of intrinsic patterns of brain connectivity revealed during resting state using machine learning…

Comparison between relational concepts and word definitions coincided with lower levels of thinking, and abstract definitions with the highest level. (Author)

Administered a complex reaction time task to 47 learning-disabled and 41 control children. The preparatory interval between a warning and act light was manipulated for length and regularity. Results indicated that the inability to sustain attention over time, rather than momentary inattentiveness, distinguished the two groups. (Author)

Two studies with 658 white and 353 African-American elementary school children performing reaction time tasks are offered in support of Spearman's hypothesis about the relative size of the mean African-American-white differences on mental tests as a function of the tests' loadings on psychometric "g." (SLD)

The relative math expectancies (RMEs) and math-performance attributions of 122 male and 177 female eighth graders were examined in relation to an Expectancy-Attribution process model of performance. Results from the Mathematics Attribution Scale and a RME rating scale support the model and indicate gender differences in cognitive patterns in…

Six experiments with 42 kindergartners, 190 first graders, and 15 second graders in Germany investigated why arithmetic word problems with an unknown reference set are more difficult for children than are problems with an unknown compare set. Lack of access to flexible language use makes these problems so difficult. (SLD)

Cognitive differences between 987 LD children and 178 EH children in public schools on a psychoeducational assessment battery were studied, and differences in factor structure were investigated. Caution is suggested in interpreting the results of multivariate statistical analyses, which indicated heterogeneity in the matrices of LD and EH…

An age-dependent answer-selection sequence of answers on multiple-choice tests suggested by previous studies was supported using statistical rather than clinical means. Results with 2,810 students aged 88 months through 241 months given a reading comprehension test twice during a 5-month interval support the systematically connected age-dependent…

Testwise responses of grade-school students to multiple-choice science items and the intercorrelations between different testwiseness skills were examined in this document. A total of 134 third-grade, 133 fifth-grade, and 143 sixth-grade students from two elementary schools in a large suburban school district in Utah responded to 60 science items…