Intraindividual variability (IIV) in cognitive speed, or moment-to-moment changes in ability, is a developmental phenomenon indicative of neurological integrity that increases gradually across adulthood. Past research has shown that IIV negatively covaries with cognitive performance, in which higher IIV at one occasion is associated with poorer…

Purpose: The aim of this study was to determine whether the word-learning challenges associated with developmental language disorder (DLD) result from encoding or retention deficits. Method In Study 1, 59 postsecondary students with DLD and 60 with normal development (ND) took the California Verbal Learning Test-Second Edition, Adult Version…

Childhood socioeconomic status (SES), as measured by parental education and family income, is highly predictive of academic achievement, but little is known about how specific cognitive systems shape SES disparities in achievement outcomes. This study investigated the extent to which executive function (EF) mediated associations between parental…

Purpose: Of the three currently recognized variants of primary progressive aphasia, behavioral differentiation between the nonfluent/agrammatic (nfvPPA) and logopenic (lvPPA) variants is particularly difficult. The challenge includes uncertainty regarding diagnosis of apraxia of speech, which is subsumed within criteria for variant classification.…

The purpose of this study was to design an instrument for five- to six-year-old children to help measure their verbal reasoning skills and assess the validity and reliability of the resulting instrument. For this purpose, the researchers have created the Younger Children Verbal Reasoning Test (YCVR-test) and a control instrument, which have been…

One critical step toward to a better understanding of creativity is to unveil its underlying genetic architectures. Recently, several studies have been conducted to investigate the effects of dopamine (DA) and 5-hydroxytryptamine (5-HT) related genetic polymorphisms on creativity. Among DA related genes, dopamine D2 receptor gene…

This research examined whether non-"g" residuals of the SAT and ACT subtests, obtained after removing g, predicted specific abilities. Non-"g" residuals of the verbal and math subtests of the SAT and ACT were correlated with academic (verbal and math) and non-academic abilities (speed and shop), both based on the Armed Services…

In 2 field experiments, we relied on the very features of real testing situations--where both math and verbal tests are administered--to examine whether order of test administration can, by itself, create vs. alleviate stereotype threat (ST) effects on girls' math performance. We predicted that taking the math test before the verbal test would be…

Prenatal and perinatal risk factors, such as low birth weight, have been linked to higher levels of aggressive and destructive behaviours during childhood. Although low birth weight is associated with childhood externalizing behaviour, the mechanisms underlying this relationship remain open to empirical investigation. The current study extends the…

The remote associates test (RAT) is a complex verbal task with associations to both creative thought and general intelligence. RAT problems require not only lateral associations and the internal production of many words but a convergent focus on a single answer. Complex problem-solving of this sort may thus require both substantial verbal…

Stigmatized group membership leads to deleterious consequences for individuals. More specifically, according to stereotype threat literature, the awareness of negative intellectual stereotypes can impair stereotyped group members' performance. Based on this framework, two studies were designed to explain the lower grades obtained by French-Arab…

Turner syndrome (TS) is a relatively common neurogenetic disorder characterized by complete or partial monosomy-X in a phenotypic female. TS is associated with a cognitive profile that typically includes intact intellectual function and verbal abilities with relative weaknesses in visual-spatial, executive, and social cognitive domains. In this…

Mathematical learning difficulties can originate at an early age. However, research on young children's math development, especially those who are at risk, is in its early stages. The current study is the first to examine the effects of an activity with an educational e-book on emergent math with 52 preschoolers at risk for learning disability…

The influence of general and verbal ability on each of 72 verbal analogy test items were investigated with new factor analytical techniques. The analogy items together with the Computerized Swedish Enlistment Battery (CAT-SEB) were given randomly to two samples of 18-year-old male conscripts (n = 8566 and n = 5289). Thirty-two of the 72 items had…

Critics of moral judgment measures question whether the obtained pattern of relationships between moral judgment scores and outcome variables might be better explained by verbal/general ability. To address this concern, we assess the degree to which moral judgment development reduces to verbal ability using the Defining Issues Test (DIT). Our…