Prism Exposure Aftereffects and Direct Effects for Different Movement and Feedback Times

The effects of movement time and time to visual feedback (feedback time) on prism exposure aftereffects and direct effects were studied. In Experiment 1, the participants' (N = 60) pointing limb became visible early in the movement (.2-s feedback time, and eye-head aftereffects increased with increasing movement time (.5 to 3.0 s), but larger hand-head aftereffects showed little change. Direct effects (terminal error during exposure) showed near-perfect compensation for the prismatic displacement (11.4 diopters) when movement time was short but decreasing compensation with longer movement times. In Experiment 2, participants' (N = 48) eye-head aftereffects increased and their larger hand-head aftereffects decreased with increasing movement time (2.0 and 3.0 s), especially when feedback time increased (.25 and 1.5 s). Direct effects showed increasing overcompensation for longer movement and feedback times. Those results suggest that aftereffects and direct effects measure distinct adaptive processes, namely, spatial realignment and strategic control, respectively. Differences in movement and feedback times evoke different eye -hand coordination strategies and consequent direct effects. Realignment aftereffects also depend upon the coordination strategy deployed, but not all strategies support realignment. Moreover, realignment is transparent to strategic control and, when added to strategic correction, may produce nonadaptive performance.     

Adaptation to a Nonlinear Visuomotor Amplitude Transformation With Continuous and Terminal Visual Feedback

The control of a cursor on a computer monitor offers a simple means of exploring the limits of the plasticity of human visuomotor coordination. The authors explored the boundary conditions for adaptation to nonlinear visuomotor amplitude transformations. The authors hypothesized that only with terminal visual feedback during practice, but not with continuous visual feedback, humans might develop an internal model of the nonlinear visuomotor amplitude transformation. Thus, 2 groups were engaged in a sensorimotor adaptation task receiving either continuous or terminal visual feedback during the practice phase. In contrast to expectations, adaptive shifts and aftereffects observed in visual open-loop tests were linearly related to target amplitudes for both groups. Although the 2 feedback groups did not differ with respect to adaptive shifts and aftereffects, terminal visual feedback resulted in stable visual open-loop performance for an extended period, whereas movement errors increased after continuous visual feedback during practice. The benefit of continuous visual feedback, on the other hand, was faster closed-loop performance, indicating an optimization of visual closed-loop control.     

Discordance in Recovery Between Altered Locomotion and Muscle Atrophy Induced by Simulated Microgravity in Rats

Exposure to a microgravity environment leads to adverse effects in motion and musculoskeletal properties. However, few studies have investigated the recovery of altered locomotion and muscle atrophy simultaneously. The authors investigated altered locomotion in rats submitted to simulated microgravity by hindlimb unloading for 2 weeks. Motion deficits were characterized by hyperextension of the knees and ankle joints and forward-shifted limb motion. Furthermore, these locomotor deficits did not revert to their original form after a 2-week recovery period, although muscle atrophy in the hindlimbs had recovered, implying discordance in recovery between altered locomotion and muscle atrophy, and that other factors such as neural drives might control behavioral adaptations to microgravity.     

Visual and Proprioceptive Adaptation of Arm Position in a Virtual Environment

The authors examined the resolution of a discrepancy between visual and proprioceptive estimates of arm position in 10 participants. The participants fixed their right shoulder at 0°, 30°, or 60° of transverse adduction while they viewed a video on a head-mounted display that showed their right arm extended in front of the trunk for 30 min. The perceived arm position more closely approached the seen arm position on the display as the difference between the actual and visually displayed arm positions increased. In the extreme case of a 90° discrepancy, the seen arm position on the display was very gradually perceived as approaching the actual arm position. The magnitude of changes in sensory estimates was larger for proprioception (20%) than for vision (< 10%).     

Acculturation,Adaptation and Saudade Among Portuguese Migrants

Saudade is a psychological reaction to the absence of significant others and familiar places. This investigation examined differences in saudade in a sample of 227 Portuguese adults without migratory experience, and 202 Portuguese migrants living in Switzerland. Within the migrant group, the relation between saudade and acculturation and adaptation factors was also examined. Results indicate that migrants experienced higher levels of saudade than did non-migrants. Length of residence abroad influenced the level of saudade: the longer the time spent abroad the less saudade was felt. Acculturation and adaptation factors accounted for 44% of the explained variance in saudade. Among acculturation factors, higher Portuguese proficiency and separation, and lower assimilation predicted more saudade. Among the adaptation factors, higher sociocultural adaptation problems and lower migration satisfaction also predicted higher saudade. It is hoped that investigation on saudade continues, and suggestions are made for further research.     

Exploring Sensory Integrative Treatment in Chronic Schizophrenia

An investigation of the efficacy of sensory integrative treatment of the psychiatric status and physical functioning of patients with chronic schizophrenia is reported. Patients were involved in sequenced sensory integrative treatment over a seventeen week period. Significant improvement was found in scores of the NOSIE-30 as well as on some of the usual idicators of sensory integrative status: thumb-finger opposition, diadochokinesis, eye pursuits and balance. Length of treatment time was linearly related to amount of improvement.     

Brief Sensation Seeking Scale for Chinese – Cultural adaptation and psychometric assessment

International behavioral research requires instruments that are not culturally-biased to assess sensation seeking. In this study we described a culturally adapted version of the Brief Sensation Seeking Scale for Chinese (BSSS-C) and its psychometric characteristics. The adapted scale was assessed using an adult sample (n = 238) with diverse educational and residential backgrounds. The BSSS-C (Cronbach alpha = 0.90) was correlated with the original Brief Sensation Seeking Scale (r = 0.85, p < 0.01) and fitted the four-factor model well (CFI = 0.98, SRMR = 0.03). The scale scores significantly predicted intention to and actual engagement in a number of health risk behaviors, including alcohol consumption, cigarette smoking, and sexual risk behaviors. In conclusion, the BSSS-C has adequate reliability and validity, supporting its utility in China and potential in other developing countries.     

Review of "The Cultural Context of Sexual Pleasure and Problems: Psychotherapy With Diverse Clients," edited by Kathryn S. K. Hall and Cynthia A. Graham

A content and thematic analysis was conducted using forum messages from websites developed for wives of online gamers who play World of Warcraft. Blog posts from 50 women describing conflict in their marital relationship involving their husband's online game play were analyzed. Four overarching themes were identified and discussed in terms of the impact of online gaming on family functioning and relationships, emotional outcomes, and coping mechanisms. Results of ensuing issues arising from excessive gaming as perceived by the non-gaming spouse and ways in which they cope with these issues are shared.     

Strategy instruction for writing composition at school and at home

Abstract

The objectives of this study are 1) to analyze the effectiveness of a writing composition intervention program aimed to increase children's writing performance and other personal variables; 2) to analyze whether implementation in the environment (school and home) or responsible figures (parents and teachers) produced different effects in program effectiveness; and 3) to check whether increasing parental involvement in doing homework was sufficient to improve children's outcomes or whether prior family training is required to enable them to be efficient. The sample consisted of 112 students (5th-6th grade) and their families. 26 of them made up the EFP group (mothers implementing a writing program), 25 of them were assigned to the PAD group (mothers increasing help with writing homework), 35 to the PRO group (teachers applying a writing program) and 26 to the OC group (ordinary curriculum). We analyze the results and present and discuss our conclusions.     

Internet pornography and paedophilia

Various indices of use of Internet pornography have drawn attention to the extent of adult sexual interest in children; clinical experience and now research evidence are accumulating to suggest that the Internet is not simply drawing attention to those with existing paedophilic interests, but is contributing to the crystallisation of those interests in people with no explicit prior sexual interest in children. Drawing on clinical experience in a specialist NHS outpatient psychotherapy service, the author argues that a dichotomous notion of paedophilia is no longer tenable, and any model of paedophilia needs to take account of eruptions of a sexual interest in children in those who appear not to be consistently paedophilic and who have had adult-to-adult sexual relationships. This phenomenon is analysed in two ways: first, by considering how it is that the adult sexual adaptation might ‘unravel’ under the influence of Internet sex to reveal underlying paedophilic currents and second, by revisiting general and psychoanalytic theories of paedophilia and by considering how predisposing factors to paedophilia might be amplified through access to Internet pornography.