BACKGROUND We recently demonstrated that decline in fluid intelligence is a substantial contributor to frontal deficits. For some classical 'executive' tasks, such as the Wisconsin Card Sorting Test (WCST) and Verbal Fluency, frontal deficits were entirely explained by fluid intelligence. However, on a second set of frontal tasks, deficits remained even after statistically controlling for this ...

The performance on a learning-set task of 20 normal and 20 brain-damaged 5s of comparable verbal intelligence was contrasted. An analysis of variance showed that the normals were superior to the brain damaged in improvement over repeated trials of the same problem and over blocks of similar problems. The normals made fewer errors of perseverative type, repetitive type, and made fewer incorrect ...

The research psychologist interested in studying the behavior of neuropsychiatric (NP) patients is almost always faced with the task of eliminating from his study those Ss who may perform poorly, not because of any problems associated with patient status but, rather, because of intellectual deficiency. One very brief self-administered multiple-choice test of verbal intelligence has been develop...

Turner syndrome (TS) is associated with a characteristic neurocognitive profile which includes average to low full scale intelligence quotient (FSIQ) with a significant discrepancy between verbal IQ (VIQ) and performance IQ (PIQ) [1].They have average verbal skills but weaker non verbal skills like visuospatial, perceptual, processing speed and executive functioning leading to problems in acade...

Although there is clear evidence that low verbal ability is a risk factor for conduct disorder (CD), some researchers have questioned whether this association is due to the common comorbidity between attention-deficit/hyperactivity disorder (ADHD) and CD. The present study examined the association among verbal ability, ADHD, and CD in a genetically informative sample in order to examine the rol...

Montreal high school students studying French as a second language completed a battery of tests including measures of linguistic aptitude. verbal intelligence, and various attitudinal and motivational characteristics. Analysis of the intercorrelations of these tests yielded two orthogonal factors equally related to ratings of achievement in French: a linguistic aptitude and a "motivational" fac...

Schizophrenia-spectrum risk alleles may persist in the population, despite their reproductive costs in individuals with schizophrenia, through the possible creativity benefits of mild schizotypy in non-psychotic relatives. To assess this creativity-benefit model, we measured creativity (using 6 verbal and 8 drawing tasks), schizotypy, Big Five personality traits, and general intelligence in 225...

years or more is suggestive of mental deficiency witil I.Q. below 70. There are educational achievement tests which are easy to give in tile office, and which are of some assistance in estimating 110w retarded the (lefective child is. They are especially valuable in differentiating reading disability. If it is necessary to know more accurately at what level of intelligence the defective child i...

For a prospective study of lead exposure and early development, we recruited pregnant women from a lead smelter town and from an unexposed town in Yugoslavia and followed their children through 7 years of age. In this paper we consider associations between lifetime lead exposure, estimated by the area under the blood lead (BPb) versus time curve (AUC7), and intelligence, with particular concern...