Background: A high prevalence of Developmental Language Disorder (DLD) is reported in the population of Young Offenders (YO). However, little is known about the extent of the association between language and offending behaviour relative to social disadvantage, education attendance and non-verbal intelligence (IQ), and neither has this association…

There is a long-standing controversy over the relationship between psychopathology and creativity. Yet there is a lack of evidence regarding the relationship between common psychopathologies and indicators of little-c, or every day, creativity among laypeople. To make sense of this connection, we conducted a meta-analysis using 89 studies to…

National IQs and measures of technological development given by Comin, Easterly and Gong (2010) are presented for 133 nations for the year 1000 BC, for 134 nations for 0 AD, for 120 nations for 1500 AD and for 133 nations for 2000 AD. It is shown that national IQs are significantly correlated with national differences in technological development…

The present study was intended to provide perspective, albeit less than unequivocal, on the research of Lynn (2010) who reported higher IQs in the northern than southern Italian regions. He attributes this to northern Italians having a greater genetic similarity to middle Europeans and southern Italians to Mediterranean people. Higher regional IQ…

In the present study, speeded tasks with differing assumed difficulties of the trials are regarded as a special class of simple cognitive tasks. Exploratory latent growth modeling with data-driven shape of a growth curve and nonlinear structured latent curve modeling with predetermined monotonically increasing functions were used to analyze…

Beraldo (2010) and Cornoldi, Belacchi, Giofre, Martini, and Tressoldi (2010) (CBGMT) have eight criticisms of my paper (Lynn, 2010) claiming that the large north-south differences in per capita income in Italy are attributable to differences in the average levels of intelligence in the populations. CBGMT give results for seven data sets for IQs in…

The present study provides a preliminary empirical test of [Chamorro-Premuzic, T., & Furnham, A. (2004). A possible model to understand the personality-intelligence interface. "British Journal of Psychology," 95, 249-264], [Chamorro-Premuzic, T., & Furnham, A. (2006a). Intellectual competence and the intelligent personality: A…

This study, with 496 children seeking admission to a special program for gifted preschoolers, found that creativity (as measured by the Thinking Creatively in Action and Movement Scale) was significantly related to intelligence (as measured by standard IQ tests) when IQs were less than 120 but was not related at higher IQ levels. (DB)

Taylor (1980) claims to show that the similarity in IQ between monozygotic twins reared apart found in prior studies is due to similarity in their environments. A reanalysis using Taylor's classification of environments but an alternative IQ measure shows that his findings do not constructively replicate. (Author/RD)

This study investigated the relationship between Jensen's Level I-Level II mental abilities and how they correlate with problem solving in college students. The Level I-Level II correlation was not significant, but intelligence and problem solving were significantly correlated. Results are discussed in relation to prior findings. (Author/RD)

Three experiments are reported investigating experts' and laypersons' conceptions of intelligence. In the first experiment, persons studying in a college library, entering a supermarket, and waiting for trains in a railroad station were asked to list behaviors characteristic of either "intelligence,""academic intelligence,""everyday intelligence,"…

The percentage of variance in achievement accounted for by IQ greatly decreased as the subgroups became more removed from the mean IQ for the sample. Results suggest that definition and placement decisions based on IQ be reconsidered for populations whose mean IQ is substantially above or below the average IQ. (DB)

The purpose of this study is threefold. First, an estimate of state IQ is derived and its strengths and limitations are considered. To that end, an indicator of downward bias in estimating state IQ is provided. Two preliminary causal models are offered that predict state IQ. These models were found to be highly predictive of state IQ, yielding…

It is unclear whether brain mechanisms underlying human intelligence are distributed throughout the brain or mainly concentrated in the frontal lobes. Data are inconsistent possibly due, at least in part, to the different ways the construct of intelligence is measured. Here we apply the method of correlated vectors to determine how the general…

The purpose of this study was to investigate the relationship between auditory discrimination, as measured by the Wepman Auditory Discrimination Test, and reading achievement, as measured by the Woodcock Reading Mastery Tests. After controlling for intelligence, there was little more than a random relationship between auditory discrimination and…