We examined whether attained socioeconomic status (SES) moderated genetic and environmental sources of individual differences in cognitive performance using pooled data from 9 adult twin studies. Prior work concerning SES moderation of cognitive performance has focused on rearing SES. The current adult sample of 12,196 individuals (aged 27-98…

This paper presents a comprehensive analysis of the link between age and proficiency in information-processing skills, based on information drawn from the Survey of Adult Skills (PIAAC). The data reveal significant age-related differences in proficiencies, strongly suggesting that proficiency tends to "naturally" decline with age. Age…

Several judgment and decision-making tasks are assumed to involve memory functions, but significant knowledge gaps on the memory processes underlying these tasks remain. In a study on 568 adults between 25 and 80 years of age, hypotheses were tested on the specific relationships between individual differences in working memory, episodic memory,…

Measured aspects of problem solving in adult male psychiatric patients (n=9), who were hospitalized after attempted suicide. Controls (n=15) were patients with chronic idiopathic pain and healthy volunteers. Results indicated there were no differences in problem solving or flexibility, although suicidal patients scored significantly lower on…

Presents two studies of thoughts in relation to viewing of expository television programs. Shows a close relationship between comprehension and thoughts, and demonstrates that expository television can engage viewers in deep cognitive activities. Finds different reception profiles among viewers, correlating closely with topic-relevant previous…

Factor analysis of the Swedish version of the Wechsler Adult Intelligence Scale-Revised on 88 adults with dyslexia showed a three-factor structure: a verbal comprehension (VC) factor, a perceptual organization (PO) factor, and a freedom from distractibility (FD) factor. The PO factor had the highest scores and the FD the lowest. (Contains…

This study presents the procedures and results of an experiment conducted in Sweden to assess the relative effectiveness of two methods of teaching the grammatical structures of English as a foreign language to adults. The main objective of the study is to find indications as to which of the two theories (the audiolingual habit theory or the…