Generalization of prism adaptation

Prism exposure produces 2 kinds of adaptive response. Recalibration is ordinary strategic remapping of spatially coded movement commands to rapidly reduce performance error. Realignment is the extraordinary process of transforming spatial maps to bring the origins of coordinate systems into correspondence. Realignment occurs when spatial discordance signals noncorrespondence between spatial maps. In Experiment 1, generalization of recalibration aftereffects from prism exposure to postexposure depended upon the similarity of target pointing limb postures. Realignment aftereffects generalized to the spatial maps involved in exposure. In Experiment 2, the 2 kinds of aftereffects were measured for 3 test positions, one of which was the exposure training position. Recalibration aftereffects generalized nonlinearly, while realignment aftereffects generalized linearly, replicating Bedford (1989, 1993a) using a more familiar prism adaptation paradigm. Recalibration and realignment require methods for distinguishing their relative contribution to prism adaptation.     

Age effects on social cognition: faces tell a different story

The authors administered social cognition tasks to younger and older adults to investigate age-related differences in social and emotional processing. Although slower, older adults were as accurate as younger adults in identifying the emotional valence (i.e., positive, negative, or neutral) of facial expressions. However, the age difference in reaction time was largest for negative faces. Older adults were significantly less accurate at identifying specific facial expressions of fear and sadness. No age differences specific to social function were found on tasks of self-reference, identifying emotional words, or theory of mind. Performance on the social tasks in older adults was independent of performance on general cognitive tasks (e.g., working memory) but was related to personality traits and emotional awareness. Older adults also showed more intercorrelations among the social tasks than did the younger adults. These findings suggest that age differences in social cognition are limited to the processing of facial emotion. Nevertheless, with age there appears to be increasing reliance on a common resource to perform social tasks, but one that is not shared with other cognitive domains.     

Memory self-efficacy predicts memory performance: results from a 6-year follow-up study

The purpose of this study was to examine the relationship between memory self-efficacy (MSE) and a 6-year follow-up assessment of memory functioning in a sample of Dutch older adults. MSE was assessed by a Dutch abridged version of the Metamemory in Adulthood questionnaire (MIA; R. A. Dixon, D. F. Hultsch, & C. Hertzog, 1988; C. Hertzog, D. F. Hultsch, & R. A. Dixon, 1989; R. W. H. M. Ponds & J. Jolles, 1996). The total MSE score predicted memory performance at 6 years, as measured by the Visual Verbal Learning Task (VVLT; N. Brand & J. Jolles, 1985). A separate analysis of the different MSE subscales indicated that the MIA Change score was the most salient domain-specific MSE predictor of subsequent memory performance after 6 years. An extreme groups analysis of the MIA Change score revealed a pattern of performance for those who perceived that their memory was worsening, performing less well on the 3 trials of the VVLT when these were readministered at the 6-year follow-up.     

False assumptions about psychopathology, hysteria and the MMPI-2 Restructured Clinical Scales

The MMPI-2 Restructured Clinical scales rest on the common behavioral assumption that consistent items can be added to assess all psychopathologies. This may be the case for some unitary symptoms such as anxiety or anger, but not for complex diagnostic conditions such as Hysteria, Post Traumatic Stress Disorder, and Borderline Personality Disorder. These are better understood with a psychodynamic formulation. Psychodynamic theory assumes that internal conflicts and contradictions are a significant feature of many psychopathologies. For example, the new MMPI-2 Restructured Clinical scales eliminated a measure of hysteria. The RC3 Cynicism scale is not an improvement over the MMPI-2 Hysteria scale, as the new scale serves as an example of a failure of the behaviorism to account for complex psychopathology. Making scales more internally consistent and distinct from each other has not produced more external validity and useful measures for many of the psychopathologies found in clinical practice.     

Lost in virtual space: studies in human and ideal spatial navigation

The authors describe 3 human spatial navigation experiments that investigate how limitations of perception, memory, uncertainty, and decision strategy affect human spatial navigation performance. To better understand the effect of these variables on human navigation performance, the authors developed an ideal-navigator model for indoor navigation whose optimizing algorithm uses a partially observable Markov decision process. The model minimizes the number of actions (translations and rotations) required to move from an unknown starting state to a specific goal state in indoor environments that have perceptual ambiguity. The authors compared the model's performance with that of the human observer to measure human navigation efficiency. Experiment 1 investigated the effect of increasing the layout size on spatial way-finding efficiency and found that participants' efficiencies decreased as layout size increased. The authors investigated whether this reduction in navigation efficiency was due to visual perception (Experiment 2), memory, spatial updating strategy, or decision strategy (Experiment 3).     

Relationships between dissatisfaction with specific body characteristics and the Sociocultural Attitudes Toward Appearance Questionnaire-3 and Objectified Body Consciousness Scale

Body dissatisfaction was studied in 123 predominately European-American college women. Desired changes in body characteristics were associated with scores on the Sociocultural Attitudes Toward Appearance Questionnaire (SATAQ-3) and the Objectified Body Consciousness Scale (OBCS). All SATAQ-3 measures were associated with desired changes in bust size and height, but were not related to desired upper body size. In contrast, the OBCS Surveillance and Body Shame Scales were related to desired upper body size, but were not related to desired bust size or height. As hypothesized, the SATAQ-3 Pressure and Internalization-General Scales and the OBCS Surveillance and Body Shame Scales were related to desired weight and lower body size. Results indicate body dissatisfaction is a complex construct and different aspects of this construct are related to different dispositional measures. Results also indicate that the OBCS is a more narrowly focused measure than the SATAQ-3.     

The impact of client race on clinician detection of eating disorders

Eating disorders are thought to occur less among African-American women than among women of other ethnic groups. Ninety-one clinicians read 1 of 3 passages (differing only with regards to the girl’s race: African-American, Caucasian, or Hispanic) describing disturbed eating patterns of a fictional character named Mary. Participants were then asked to indicate if they thought Mary had a problem and to rate her anxiety, depression, and eating disorder symptoms based upon the passage they had read. The results suggest that clinicians may have race-based stereotypes about eating disorders that could impede their detection of symptoms in African-American girls.     

Parallel response selection in dual-task situations

Semantic priming and response priming were studied in a dual-task procedure. In two experiments, reaction times to the first and second stimuli were faster when the finger required for the Task 1 response was the same as the finger required for the Task 2 response. Such priming suggests that Task 2 response information was generated prior to the completion of Task 1 response selection. These data pose a potential challenge to the response-selection bottleneck (RSB) theory of dual-task performance, since they may indicate a violation of the discrete-stage processing assumption on which the underlying locus-of-slack logic depends. Accommodating these data while preserving the essential bottleneck character of RSB theory may be possible but may also alter the very nature of the bottleneck itself.     

Maternal employment and child development: a fresh look using newer methods

The employment rate for mothers with young children has increased dramatically over the past 25 years. Estimating the effects of maternal employment on children's development is challenged by selection bias and the missing data endemic to most policy research. To address these issues, this study uses propensity score matching and multiple imputation. The authors compare outcomes across 4 maternal employment patterns: no work in first 3 years postbirth, work only after 1st year, part-time work in 1st year, and full-time work in 1st year. Our results demonstrate small but significant negative effects of maternal employment on children's cognitive outcomes for full-time employment in the 1st year postbirth as compared with employment postponed until after the 1st year. Multiple imputation yields noticeably different estimates as compared with a complete case approach for many measures. Differences between results from propensity score approaches and regression modeling are often minimal.