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…

The effects of delaying an immediate test, a rehearsal opportunity, or a second presentation on long-term free recall were investigated in an experiment combining features of the Brown-Peterson and free-recall paradigms. A proposed model assumes that both repetitions and tests promote learning. (CHK)

When subjects are tested on ordered information, performance is better on inferences than on information actually presented during training. Humphreys suggested that superiority on inferences derives from differential frequency. This experiment refutes that position, demonstrating that superiority on inferences is observed even when frequency is…

The influence of neurological and demographic variables on neuropsychological test performance was examined in 100 9- to 16-year-old children with traumatic brain injury (TBI). Regression analyses were conducted to determine the relative contributions of coma, neuroimaging findings, ethnicity, socioeconomic status, and gender to variance in…

Subjects were asked to encode and recall lists of words under the influences of marijuana and a marijuana placebo. Free recall was more complete when both encoding and recall were after marijuana use than in the encode-marijuana, recall-placebo state. Recall must depend on restoration of dissociated encoding state. (CHK)

This verbal memory study considers only simple sentences and examines learner performance under the two conditions of audio presentation and printed presentation. Learner performance is compared when required either to recognize sentences identical to those in the original list or, alternatively, to recognize non-identical sentences incorporating…

The effect of verbal labeling in a serial position short term memory task was investigated. Forty female college students were given 16 trials each. Eight trials involved only central items which had to be recalled. The other eight trials involved both central and incidental items. Half of the subjects verbalized the names of the central items as…

THIS COMPARATIVE ANALYSIS OF PRODUCTIVE THINKING IN RETARDED AND NONRETARDED CHILDREN USED DATA FROM A SAMPLE OF 78 PUBLIC SCHOOL CHILDREN DIVIDED INTO THREE GROUPS--(1) MENTALLY RETARDED CHILDREN IN SPECIAL CLASSES, (2) RETARDED CHILDREN IN REGULAR CLASSES, AND (3) NONRETARDED CHILDREN IN REGULAR CLASSES. THE GROUPS WERE SELECTED SO THAT THERE…