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Direct linkJohnson, Wendy; Deary, Ian J. – Intelligence, 2011
The idea that information processing speed is related to cognitive ability has a long history. Much evidence has been amassed in its support, with respect to both individual differences in general intelligence and developmental trajectories. Two so-called elementary cognitive tasks, reaction time and inspection time, have been used to compile this…
Descriptors: Intelligence, Reaction Time, Cognitive Processes, Cognitive Ability
Major, Jason T.; Johnson, Wendy; Deary, Ian J. – Intelligence, 2012
Three prominent theories of intelligence, the Cattell-Horn-Carroll (CHC), extended fluid-crystallized (Gf-Gc) and verbal-perceptual-image rotation (VPR) theories, provide differing descriptions of the structure of intelligence (McGrew, 2009; Horn & Blankson, 2005; Johnson & Bouchard, 2005b). To compare these theories, models representing them were…
Descriptors: Intelligence, Achievement Tests, Factor Structure, Models
Calvin, Catherine M.; Fernandes, Cres; Smith, Pauline; Visscher, Peter M.; Deary, Ian J. – Intelligence, 2010
General cognitive ability ("g") does not explain sex differences in academic test performance by the end of compulsory education. Instead, individual differences in specific reasoning abilities, after removing the effects of "g," may contribute to the observed gender gaps. Associations between general or specific cognitive…
Descriptors: State Schools, Females, Compulsory Education, Academic Achievement
Intelligence and Persisting with Medication for Two Years: Analysis in a Randomised Controlled Trial
Deary, Ian J.; Gale, Catharine R.; Stewart, Marlene C. W.; Fowkes, F. Gerald R.; Murray, Gordon D.; Batty, G. David; Price, Jacqueline F. – Intelligence, 2009
The study examined whether verbal intelligence is associated with persisting to take medication for up to two years. The design is a prospective follow-up of compliance with taking medication in high-risk individuals participating in a randomised, placebo-controlled trial set in Central Scotland. Participants were 1993 people aged between 50 and…
Descriptors: Outcomes of Treatment, Measures (Individuals), Intelligence Quotient, Foreign Countries
Deary, Ian J.; Strand, Steve; Smith, Pauline; Fernandes, Cres – Intelligence, 2007
This 5-year prospective longitudinal study of 70,000+ English children examined the association between psychometric intelligence at age 11 years and educational achievement in national examinations in 25 academic subjects at age 16. The correlation between a latent intelligence trait (Spearman's "g"from CAT2E) and a latent trait of…
Descriptors: Academic Achievement, Intelligence, Longitudinal Studies, Children
