Effects of environmental support on overt and covert visuospatial rehearsal

People can rehearse to-be-remembered locations either overtly, using eye movements, or covertly, using only shifts of spatial attention. The present study examined whether the effectiveness of these two strategies depends on environmental support for rehearsal. In Experiment 1, when environmental support (i.e., the array of possible locations) was present and participants could engage in overt rehearsal during retention intervals, longer intervals resulted in larger spans, whereas in Experiment 2, when support was present but participants could only engage in covert rehearsal, longer intervals resulted in smaller spans. When environmental support was absent, however, longer retention intervals resulted in smaller memory spans regardless of which rehearsal strategies were available. In Experiment 3, analyses of participants’ eye movements revealed that the presence of support increased participants’ fixations of to-be-remembered target locations more than fixations of non-targets, and that this was associated with better memory performance. Further, although the total time fixating targets increased, individual target fixations were actually briefer. Taken together, the present findings suggest that in the presence of environmental support, overt rehearsal is more effective than covert rehearsal at maintaining to-be-remembered locations in working memory, and that having more time for overt rehearsal can actually increase visuospatial memory spans.     

E-nabled for E-Learning? The Moderating Role of Personality in Determining the Optimal Degree of Learner Control in an E-Learning Environment

This paper investigates the moderating role of specific Big Five personality traits on the relationship between learner control and training performance in an e-learning environment. Specifically, we examined the role of openness to experience, conscientiousness, and extraversion. Participants completed a video-based e-learning program with either a high or low level of learner control. Results demonstrated that the personality traits of openness to experience and extraversion moderated the relationship between learner control and training performance. Specifically, training performance was higher for trainees higher in openness and extraversion when they were in an environment with high learner control versus low learner control. Conversely, for trainees lower in these traits, performance was higher with low learner control versus high learner control. Future research and practical applications are discussed.     

The effects of venlafaxine and cognitive behavioral therapy alone and combined in the treatment of co-morbid alcohol use-anxiety disorders

The effects of the antidepressant venlafaxine (VEN-225 mg daily) and transdiagnostic cognitive behavioral treatment (CBT) alone and in combination on alcohol intake in subjects with co-morbid alcohol use disorders (AUDs) and anxiety disorders were compared. Drinking outcomes and anxiety were assessed for 81 subjects treated for 11 weeks with one of 4 conditions: 1) VEN–CBT, 2) VEN-Progressive Muscle Relaxation therapy (PMR), 3) Placebo (PLC)-CBT and 4) a comparison group of PLC-PMR. For subjects who reported taking at least one dose of study medication, the Time × Group interaction was significant for percent days of heavy drinking and drinks consumed per day. For the measure of percent days heavy drinking, the paired comparison of PLC-CBT versus PLC-PMR group indicated that the PLC-CBT group had greater drinking reductions, whereas other groups were not superior to the comparison group. In Week 11, the proportion of subjects in the PLC-CBT group that had a 50% reduction from baseline in percent days heavy drinking was significantly greater than those in the comparison group. Of the 3 “active treatment” groups only the PLC-CBT group had significantly decreased heavy drinking when contrasted to the comparison group. This finding suggests that the transdiagnostic CBT approach of Barlow and colleagues may have value in the management of heavy drinking in individuals with co-morbid alcoholism and anxiety.     

Ipsilesional Arm Motor Sequence Performance After Right and Left Hemisphere Damage

Aiming movements are part of daily activities but the brain hemispheres’ role in targeted aiming sequential movements is not fully clear. Start and execution of discrete and sequential tasks toward targets were analyzed in 10 individuals with left-hemisphere damage, 10 right-hemisphere–damaged, and 10 healthy ones. Arm movements were performed over a digitizing tablet, following stimuli on a monitor, from initial position toward right and left-positioned targets. Poststroke individuals used their ipsilesional arm and healthy individuals, both arms. Right-hemisphere–damaged individuals showed higher reaction time and left-hemisphere–damaged individuals, lower smoothness. Due to spatial demand of tasks, the right hemisphere played a major role in movement planning, while the left, in movement execution.     

From One to Two: Can Visual Feedback Improve the Light Touch Effects on Postural Sway?

The postural control is improved by implicit somatosensory information from lightly touching a rigid bar or explicit visual information about the postural sway. Whether these two additional sources provided at the same time further reduce the postural sway is still unknown. Participants stood on a force plate as quiet as possible lightly touching the bar while received or not visual feedback of the center of pressure position on a monitor screen. Postural sway reduced similarly with the light touch regardless of the additional visual feedback. The findings suggested that providing explicit visual feedback of the center of pressure does not increase the light touch effects on the postural sway. The importance of the implicit somatosensory information on postural control is discussed.     

Book Reviews

BRUNO BETTELHEIM : The Empty Fortress: Infantile Autism and the Birth of the Self. The Free Press, New York. 1967. $9.95. (£4 in England).

GERALD O'GORMAN: The Nature of Childhood Autism. (Illustrated, 8 plates)

C. M. HEINICKE and I. J. WESTHEIMER: Brief Separations.     

Perceptual load does not modulate auditory distractor processing

In vision, it is well established that the perceptual load of a relevant task determines the extent to which irrelevant distractors are processed. Much less research has addressed the effects of perceptual load within hearing. Here, we provide an extensive test using two different perceptual load manipulations, measuring distractor processing through response competition and awareness report. Across four experiments, we consistently failed to find support for the role of perceptual load in auditory selective attention. We therefore propose that the auditory system – although able to selectively focus processing on a relevant stream of sounds – is likely to have surplus capacity to process auditory information from other streams, regardless of the perceptual load in the attended stream. This accords well with the notion of the auditory modality acting as an ‘early-warning’ system as detection of changes in the auditory scene is crucial even when the perceptual demands of the relevant task are high.     

Development and Validation of the Affect in Play Scale–Brief Rating Version (APS–BR)

The concurrence of psychiatric and MMPI based diagnoses for 78 consecutively admitted patients was examined. The results suggest diagnostic coincidence for only 21 of the admitted patients, with the majority being in the differentiation of psychoneurosis from psychosis. Patient sex and chronological age did not appear to be factors in either form of diagnosis.     

Cognition and the Planning Process: An Investigation of Stability of Effects and Decision Makers' Insights

According to Hartman, White, and Crino (1986), planning situations differ in environmental volatility, system adaptation, and the nature of planning requirements, different combinations of which can generate 12 distinct planning situations and 8 information processing aids to be used as planning tools. Each information processing aid has been prescribed to be more appropriate for use in some planning situations than in others (Hartman et al.). In the first part of this study, we tested the hypothesis that a planner in a specific situation would prefer to use the information processing aid(s) prescribed for that situation. We developed 12 different cases and used 456 student subjects. Results indicated that preference did not correspond closely to the Hartman et al. theory but that some other form of implicit theory may be operating. The second part of the research replicated the first part and also examined how 57 subjects viewed their planning problems and weighed the factors involved. Part 2 was also designed to determine the nature of any implicit theory the subjects may have used. Results suggest that the pattern of preferences, although not corresponding to available theory, represents a stable phenomenon.     

Evaluation of a Spiritually Based Child Maltreatment Prevention Training Program

The authors empirically evaluated a spiritually based 1‐day child maltreatment training program. Pretest, posttest, and follow‐up results indicated that participants' recognition of hypothetical maltreatment did not increase after training. Furthermore, although participants decreased their use of items known to dissuade decisions to report, they were less likely to report maltreatment posttraining and 1 month later. Focus group data revealed that participants felt more knowledgeable but insufficiently prepared to respond to maltreatment and that they needed opportunities to practice what they had learned. Suggestions for clergy, pastoral counselors, and mental health professionals working within spiritual communities are provided to inform curriculum advancements.