Ten dyslexic boys and 10 matched controls were asked to draw a person and write a composition. The two groups are compared on time spent on tasks, number of words written, and proportions of spelling and grammatical errors. (SJL)

An expectancy hypothesis of the psychological refractory period (PRP) was tested as an alternative to an arousal hypothesis to explain retarded persons' longer reaction times, using 24 retarded adolescents, 24 nonretarded adolescents matched for chronological age, and 24 nonretarded children matched for mental age (MA). (Author)

Investigates performance of 8, 10, 12 year olds and adults on cognitive tasks in terms of several processing-speed measures, each of which may change independently with age. Results underscore the complexity of developmental change in processing efficiency. (Author/RH)

The notion that elderly adults respond more slowly than younger adults in order to ensure accuracy was investigated. The Matching Familiar Figures Test was administered to 10 males and 10 females from each of the following age groups: 30-39, 40-49, 50-59, 60-69, and 70-79 years old. (Author/SS)

Second-grade children, third-grade children, and adults judged whether pictures were members of a positive or negative memory set while trying to ignore irrelevant words printed inside the pictures. (JMB)

Subjects read a passage and were questioned about the location or content of certain items in the passage. Performance was measured by monitoring response latencies and eye fixations. Apparently the locative information provides an index to the spatial distribution of sentences in the passage. (Author/RC)

When shown a pair of digits and asked to select the larger of the two, subjects make their choice more quickly as the numerical difference between the digits increases. Presents and tests a semantic coding model that can explain this and all previous results. (Editor)

If intentional forgetting is to be understood, research must focus on the specification of exactly how memory search and decision processes are altered when a subject is instructed to forget. This research addresses that problem. (Author/RK)

The results of this test indicate that at certain levels of stimulus intensity a sensory set is more efficient; at other levels of stimulus intensity, a motor set is more efficient. (JD)

Ninety-eight participants from 5 age groups with mean ages of 6, 8, 10, 22, and 72 years were tested in a series of speeded number discriminations. Found that response time slope as a function of number size decreased with age for numbers in the 1-4 range. (MDM)

Examined the effect of attention on infants' responses to briefly exposed visual stimuli. Found that the duration of stimulus exposure in the familiarization phase was positively correlated with the preference for the novel stimulus in the paired-comparison procedure, and processing of briefly presented visual stimuli differed depending on the…

Seven- to 12-year-old boys with attention deficit hyperactivity disorder (ADHD) and a control group of non-ADHD boys performed a videogame task that required response inhibition at a signal. Results showed that ADHD boys performed well and showed appropriate psychophysiological changes. Inhibition latencies were longer for ADHD boys than non-ADHD…

Cognitive processes underlying the empirical correlation between IQ and choice reaction time (CHRT) were examined using the Culture Fair Intelligence Test and nine CHRT tasks (N=50 university students). IQ predicted well for simple control tasks and available attention, but not for attention flexibility, feature extraction, or response choices…

Theoretical/empirical foundations on which reaction times are measured and interpreted are discussed. Models of human information processing are reviewed. A hybrid procedure and analytical framework are introduced, using a speed-accuracy decomposition technique to analyze the intermediate products of rapid mental processes. Results invalidate many…

Skills in the visual encoding of words were tested by comparing the performances of fourth-grade children with those of adults. In each experiment, adults responded more rapidly to the stimuli than did children. Using a masking procedure, the study determined that the variance in response times was caused by levels of motor skill development…