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Results for “FIGURAL AFTEREFFECT”

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PubMed1976

Differences in the sequential integration of form as a function of age and interstimulus interval.

The sequential integration of visual stimuli was studied in 12 young (18-28 years) and 12 old (51-62 years) men and women. Stimuli were constructed as corresponding word halves and inter-stimulus intervals (ISI's) of varied duration (0-150 msec.) were introduced between the presentation of the two halves. Correct word identification was found to be an inverse function of ISI for both young and old subjects. The number of stimuli correctly identified was significantly lower for the older subjects at all levels of ISI. None of the interactions of age, sex, and ISI was significant. The data appear to question the "stimulus persistence" model as applied to age differences in the temporal organization of form.

Adult↗
PubMed1979

Age differences in dark-interval threshold across the life-span.

The threshold for the dark interval between two flashes was used to examine differences in stimulus persistence in 72 subjects aged 20 to 79 years. The data were then combined with results from two previous studies involving children and adolescents; thus, a cross sectional, adult, life-span view of differences in the dark-interval threshold was presented. Results showed that during childhood and adolescence there is a decline in stimulus persistence as a result of decreased receptor sensitivity. In adulthood, however, the dark-interval threshold remains fairly stable until the 70s where it increases significantly. Two possible explanations for this increase in stimulus persistence in old age are discussed.

Adult↗
PubMedDate not supplied

Figural after-effects in kinesthesis: more data on age differences.

A cross-sectional study of figural after-effects in kinesthesis on 144 subjects ranging in age from 10 to 87 years was carried out. The procedure was nearly identical to one used by Köhler and Dinnerstein (1947). The data show a significant nonmonotonic age trend of the figural after-effect. There is a decline of the kinesthetic after-effect from the youngest to the 35-50-year-old group, followed by an increase in the 51-66-year-olds, and a decrease from this group to the 67-87-year-old group. The pre-test judgments follow a quadratic trend, with a minimal deviation from the objective block size in the group of 35-50-year-old people. The theoretical basis for the relationship between age and figural after-effects is discussed with respect to an age specificity of the attentional capacity, of the cognitive strategy for making successive comparisons, and of stimulus persistence.

Adolescent↗