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Biomedical subjects

B M Atkeson

Publications and source records attributed to B M Atkeson.

7 recordsLinked to original sources
PubMed1989

Victim resistance to rape: the relationship of previous victimization, demographics, and situational factors.

The relationship between degree of resistance to sexual assault and a victim's demographic characteristics, her previous experience with violence, and situational characteristics of the assault were investigated. Victim responses during the assault were characterized as no resistance, verbal resistance, or physical resistance. Demographic characteristics and prior experience with violence did not discriminate degree of resistance. However, victim resistance was significantly predicted by six of the assault characteristics. Victims showed greater resistance if the assailant was a friend or relative, if the assailant made verbal threats, and if he physically restrained or injured her. Greater resistance was also associated with less sexual abuse.

Adolescent↗
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↗
PubMed1979

Differences in the magnitude of the Delboeuf Illusion and Usnadze Effect during adulthood.

The Delboeuf illusion (Type I) and Usnadze Effect (Type II) were used to investigate changes in perceptual processes in 72 female subjects, aged 20-79 years. Unlike other studies, small figures (less than 2 degrees) were presented for brief periods under fixation conditions. The magnitude of the Delboeuf illusion increased in old age, while the magnitude of the Usnadze Effect showed no change.

Adult↗
PubMed1978

Parent behavioral training for problem children: an examination of studies using multiple outcome measures.

The purpose of the present paper was to review parent training studies that have used multiple outcome measures to evaluate treatment effectiveness. Twenty-four studies were identified which used at least two of the following three measures: independent observer-collected data, parent-collected data, and parent-completed questionnaire data. A description of the instruments and procedures used with each assessment technique was presented. The results indicated that all three outcome measures have yielded positive results; however, parent-collected data and parent questionnaire data were associated with more positive outcome results than data collected by independent observers. Limitations of each assessment procedure were discussed and recommendations about which measures to use were made.

Adult↗
PubMed1977

Simultaneous brightness contrast in young and old adults.

The illusion of simultaneous brightness contrast was used to investigate age changes in contrast sensitivity under suprathreshold conditions. Contrary to findings for threshold measures of visual functioning in older adults, the 20 older adults (aged 60-79 yrs.) showed a significantly larger simultaneous brightness contrast effect (p less than .05) than the 20 younger adults (aged 17-26 yrs.). The increase in simultaneous brightness contrast in older adults is attributed to a degeneration of damping fibers in the visual system.

Adolescent↗