Postpartum exuberance: Not all women in a highly positive emotional state in the postpartum period are denying depression and distress

The question addressed in this study was whether or not mothers who scored low on self-report depression scales—so-called “deniers”—were denying their symptoms and suffering from an illusion of mental health. The findings did not support the interpretation that low-scoring mothers were denying other symptoms. Rather, low-scoring mothers: 1) experienced a wide range of emotions and similar levels of positive emotions compared to mid-symptom mothers; 2) changed their reported levels of depressive symptoms over the course of the study; 3) reported a variety of symptoms at levels similar to those of mothers in the mid symptom range; and 4) were affected negatively by having a diagnosis of depression, in a manner similar to mothers in the mid and high symptom groups. Furthermore, low symptom mothers consistently reported the most positive profiles of maternal adaptation with higher levels of maternal self-esteem and a high ratio of self-reported positive to negative affect. Thus, they appeared to be experiencing a heretofore underdescribed highly positive normal postpartum state that we have labeled “postpartum exuberance.” Postpartum exuberance, as well as a compromise of affective functioning associated with any lifetime diagnosis of depression regardless of the mothers' current level of depressive symptoms, highlights the complexity of emotional reactivity during the postpartum period. © 1997 Michigan Association for Infant Mental Health     

Gender Roles,Power Strategies,and Precautionary Sexual Self-Efficacy: Implications for Black and Latina Women's HIV/AIDS Protective Behaviors

This cross-sectional study tested a conceptual model of women's HIV/AIDS protective behaviors using gender roles, relationship power strategies, and precautionary sexual self-efficacy as predictors in a predominantly Black and Latina community sample of heterosexual women (N = 125). Results revealed no support for the full model, but partial confirmation for several components of the model. Education significantly predicted gender roles, and gender roles and use of direct power strategies were significant predictors of sexual self-efficacy. Most of the participants were married or partnered and were unconcerned about contracting HIV, suggesting that if women perceive that they are at low or no risk, their gender roles, power strategies, and precautionary sexual self-efficacy will be inconsequential to their HIV/AIDS risk reduction practices.     

An Alternate Method for Content-Oriented Test Construction: An Empirical Evaluation

This study empirically evaluates the relationships between rationally and empirically estimated item indices used in the development of a test of land navigation knowledge for the US Marine Corps. Three land navigation instructors provided ratings on three item indices (item content validity ratios [CVRs], difficulty, and discrimination). These ratings were correlated with empirically derived item indices (difficulty, discrimination, and item-criterion correlations) obtained from the scores of 359 Marines on measures of land navigation knowledge, skill, and performance. Contrary to previous research, item CVRs were significantly correlated with all three empirically determined item indices. The increased effectiveness of rational item indices obtained in the present study over those from previous research appears to be related to the following areas: qualifications of expert raters, match of raters to the rating task, and the nature of the rating task. The implications for content-oriented test design and for judgmental test validation strategies are discussed.     

Crossover by Line Length and Spatial Location

It is well known that line length has a systematic influence on line bisection error in neglect. Most patients with neglect misbisect long lines on the same side of true center as their brain lesion but then cross over on short lines, misbisecting them on the opposite side (i.e., crossover by line length). What is less recognized is that the spatial location of lines relative to the viewer can similarly induce a crossover effect when one considers line bisection error scores that have been averaged across individual line lengths. Patients with right hemisphere injury and neglect classically make averaged line bisection errors that fall right of true center on lines located either at midline or to the left of the viewer; however, we observed that the averaged line bisection error can fall left of true center when lines are located to the right of the viewer (i.e., crossover by spatial location). We hypothesized that crossover by both line length and spatial location stem from systematic errors in magnitude estimation, i.e., perceived line length. We tested predictions based on this hypothesis by examining how the crossover effect by line length is altered by the spatial location of lines along a horizontal axis relative to the viewer. Participants included patients with unilateral lesions of the right and left cerebral hemispheres and age-appropriate normal subjects. All groups demonstrated a crossover effect by line length at the midline location but the effect was altered by placing lines to the right and left of the viewer. In particular, patients with right hemisphere injury and neglect crossed-over across a broader range of line lengths when the lines were located to the right of the viewer rather than at either midline or left of the viewer. It is proposed that mental representations of stimulus magnitude are altered in neglect, in addition to mental representations of space, and that traditional accounts of neglect can be enhanced by including the psychophysical concept of magnitude estimation.     

Processing demand modulates the effects of spatial attention on the judged duration of a brief stimulus.

How does attention influence the judged duration of a brief stimulus? In the four experiments reported here, we show that the effect of spatial attention on duration judgment depends on the processing demand of the concurrent nontemporal task. When participants had to perform a speeded letter discrimination task in addition to duration rating, the judged duration was longer at a cued location than at an uncued location, regardless of whether the cue was exogenous or endogenous. However, when the same stimuli were presented but no concurrent nontemporal task was required, duration was judged to be shorter at the cued location, as compared with the uncued locations. Furthermore, although spatial attention influenced duration judgment, no object-based attentional effects were found. These findings suggest that, although spatial attention plays an important role in the judged duration of a briefly presented stimulus, its effect is mediated by the processing demand of the task.     

Walking While Memorizing: Age-Related Differences in Compensatory Behavior

This study investigated predictions of the life-span theory of selection, optimization, and compensation, focusing on different patterns of task priority during dual-task performance in younger and older adults. Cognitive (memorizing) and sensorimotor (walking a narrow track) performance were measured singly, concurrently, and when task difficulty was manipulated. Use of external aids was measured to provide another index of task priority. Before dual-task testing, participants received extensive training with each component task and external aid. Age differences in dual-task costs were greater in memory performance than in walking, suggesting that older adults prioritized walking over memory. Further, when given a choice of compensatory external aids to use, older adults optimized walking, whereas younger adults optimized memory performance. The results have broad implications for systemic theories of cognitive and sensorimotor aging, and the costs and benefits of assistive devices and environmental support for older populations.     

The development of functional response units: the role of demarcating stimuli.

An experiment with rats examined the roles of demarcating stimuli and differential reinforcement probability on the development of functional response units. It examined the development of units in a probabilistic, free-operant situation in which the presence of demarcating stimuli was manipulated. In all conditions, behavior became organized into two-response sequences framed by changes in local reinforcement probability. A tone demarcating the beginning and end of contingent response sequences facilitated the development of functional response units, as in chunking, but the same units developed slowly in the absence of the tone. Complex functional response units developed even though reinforcement contigencies remained constant. These findings demonstrate that models of operant learning must include a mechanism for changing the response unit as a function of reinforcement history. Markov models may seem to be a natural technique for modeling response sequences because of their ability to predict individual responses as a function of reinforcement history; however, no class of Markov chain can incorporate changing response units in their predictions.