Thomas W. Pierce

Abuse by Siblings and Subsequent Experiences of Violence Within the Dating Relationship

The present study examined the association between abuse by siblings and subsequent experiences of dating violence, comparing this to the relationship between parental abuse and dating violence. For males, dating violence was associated with abuse by older and younger brothers and sisters. For females, dating violence was associated with abuse byolder siblings but not by younger siblings. Dating violence among males was more strongly associated with sibling abuse than with parental abuse. In contrast, for females, dating violence was more strongly associated with abuse by parents. Examination of the type of violence revealed that emotional and physical aggression received from parents and siblings were associated with expressed emotional dating violence among males and with expressed physical dating violence among females. The findings support the hypothesis that abuse by siblings, like abuse by parents, may contribute to a cycle of violence in the lives of persons victimized by sibling abuse.

Polyvictimization, Childhood Victimization, and Psychological Distress in College Women

Two studies examined the relationships among polyvictimization (i.e., high cumulative levels of victimization), six categories of childhood victimization (i.e., property crime, physical assault, peer/sibling, witnessed/indirect, sexual, and child maltreatment), and current psychological symptomatology in college females. Results indicated that exposure to multiple types of childhood victimization is common. Regression analyses revealed that polyvictimization accounted for a significant proportion of variability in scores for psychological distress beyond that accounted for by any victimization category alone. Moreover, the six categories separately accounted for little to no variability beyond that accounted for by polyvictimization. Finally, polyvictimization accounted for a significant proportion of variability in scores for psychological distress, beyond that already accounted for through the simultaneous entry of all six categories of victimization. Findings reiterate the importance for clinicians and researchers to comprehensively assess multiple categories of childhood victimization and polyvictimization and provide preliminary evidence that the total number of lifetime victimizations is at least as important, if not more important, than individual categories of victimization in predicting psychological distress.

Adult age differences in attentional allocation during memory search.

Young and older adults performed a memory search task in which, before probe onset, a cue indicated which of 4 memory-set items the probe was most likely to be. The results were consistent with an attentional allocation model in which performance represents a weighted combination, across trials, of focused (i.e., selective) versus distributed attention. The model significantly underestimated the reaction time required by miscued trials, probably because of the response inhibition occurring on these trials. The degree to which Ss relied on focused attention was significantly greater for older adults than for young adults. The estimated time required to shift attention between memory-set items was equivalent for the 2 age groups.

Age-related slowing and the time course of semantic priming in visual word identification

In 4 experiments, the authors investigated the time course of semantic priming effects during 2 forms of visual word identification, lexical decision and pronunciation. On each trial, a target letter string was preceded by a single-word priming context. The effects of varying the stimulus onset asynchrony between the prime and the target indicated that the time course of semantic priming was equivalent for young and older adults. There were no consistent differences between lexical decision and pronunciation in the time course of semantic priming. The age differences associated with response selection were greater than would be predicted by generalized age-related slowing. The semantic priming effects were also inconsistent with a generalized slowing model, but the reliability of these effects was substantially lower than the reliability of the other task-related variables.

Hypertension affects neurobehavioral functioning

&NA; This study compared the neurobehavioral performance of hypertensive and normotensive men and women using neuropsychological, information‐processing, and psychometric assessments. One hundred subjects, including 68 hypertensive and 32 normotensive individuals, completed a test battery that yielded scores on measures of speed of information processing, verbal and figural memory, psychosocial functioning, Type A behavior, and locus of control. Results showed that, compared with the normotensive individuals, the hypertensives performed more poorly on a set of tasks that measure speed of information processing and short‐term memory (Digit Symbol, Digit Span (Backwards), and Reaction Time (slope)). The hypertensives also reported higher levels of state anxiety relative to their normotensive counterparts. The effects of hypertension on neurobehavioral functioning could not be accounted for on the basis of age or education.

Adult age differences in the use of distractor homogeneity during visual search

Previous research has suggested that an age-related decline may exist in the ability to inhibit distracting information during visual search. The present experiments used a conjunction search task in which the within-item features of the target (an upright L) and the distractors (rotated Ls) were identical. In each of 2 experiments, both young and older adults searched the display significantly more rapidly when the distractors were all rotated in the same direction (homogeneous) than when the distractors were rotated in different directions (heterogeneous). The concept of a generalized, age-related slowing was able to account for many aspects of the data, although the degree of relative improvement associated with distractor homogeneity was greater for young adults than for older adults.

Adult age differences in shifting focused attention

Young and older adults performed a choice response task in which 1 of 2 target letters was presented visually at 1 of 4 display locations. In 2 experiments, the validity of a target location cue and the presence of nontarget characters (distractors) were varied. With target-only displays and 40% cue validity (Experiment 1), the estimated time to shift attention between display locations was essentially 0 ms for both age groups. With 70% cue validity, Experiment 2 demonstrated significant increases in the attention shift time as a function of both increased age and the presence of distractors (asterisks). The results suggest that age-related changes in the shifting of focused attention are minimal except when the processing of nontarget information is required.

Searching from the top down: Ageing and attentional guidance during singleton detection

Previous investigations of adult age differences in visual search suggest that an age-related decline may exist in attentional processes dependent on the observers knowledge of task-relevant features (top-down processing). The present experiments were conducted to examine age-related changes in top-down attentional guidance during a highly efficient form of search, singleton detection. In Experiment 1 reaction times to detect targets were lower when target features were constant (feature condition) than when target features were allowed to vary between trials (mixed condition), and this reaction time benefit was similar for younger and older adults. Experiments 2 and 3 investigated possible interactions between top-down and bottom-up (stimulus-driven) processes. Experiment 2 demonstrated that search times for both age groups could be improved when targets varied on an additional feature from distractors (double-feature condition) but only when top-down control was available (feature search). In Experiment 3, the availability of top-down guidance enabled both younger and older adults to override the distracting effects of a noninformative spatial location cue. These findings indicate that top-down attentional control mechanisms interact with bottom-up processes to guide search for targets, and that in the context of singleton detection these mechanisms of top-down control are preserved for older adults.

Effects of aerobic exercise on cognitive and psychosocial functioning in patients with mild hypertension.

The effects of 16 weeks of physical exercise training on the psychological functioning of 90 patients with mild hypertension were examined. At baseline and after 16 weeks of training, patients completed a psychometric test battery that included objective measures of neuropsychological performance and standardized self-report measures of psychosocial functioning. Patients were randomly assigned to one of three groups: aerobic exercise, strength training and flexibility exercise, or a waiting list control group. After training, there were no group differences on any of the psychological measures, even though patients who engaged in exercise perceived themselves as functioning better in a number of psychological domains.

Cognitive function and cardiovascular responsivity in subjects with a parental history of hypertension.

College-age subjects with and without a parental history of hypertension completed a battery of tests of cognitive function on two separate occasions. Pulse rate and blood pressure were measured during performance of each task. In one session, subjects were told that their performance was being evaluated and videotaped from behind an observation mirror (Evaluation Condition). In the other session, subjects were told that their performance was not being observed (Nonevaluation Condition). Regardless of Evaluation Condition, Parental History subjects exhibited slower search of short-term memory than Non-Family History subjects during the first but not the second testing session. Parental History subjects displayed greater elevations in pulse rate than Nonparental History subjects during task performance. The results were interpreted as providing evidence that pathophysiological mechanisms associated with essential hypertension are not the only viable explanations of lower levels of cognitive performance exhibited by hypertensive subjects.