Spatial attention and audiovisual interactions in apparent motion

In this study, the authors combined the cross-modal dynamic capture task (involving the horizontal apparent movement of visual and auditory stimuli) with spatial cuing in the vertical dimension to investigate the role of spatial attention in cross-modal interactions during motion perception. Spatial attention was manipulated endogenously, either by means of a blocked design or by predictive peripheral cues, and exogenously by means of nonpredictive peripheral cues. The results of 3 experiments demonstrate a reduction in the magnitude of the cross-modal dynamic capture effect on cued trials compared with uncued trials. The introduction of neutral cues (Experiments 4 and 5) confirmed the existence of both attentional costs and benefits. This attention-related reduction in cross-modal dynamic capture was larger when a peripheral cue was used compared with when attention was oriented in a purely endogenous manner. In sum, the results suggest that spatial attention reduces illusory binding by facilitating the segregation of unimodal signals, thereby modulating audiovisual interactions in information processing. Thus, the effect of spatial attention occurs prior to or at the same time as cross-modal interactions involving motion information.     

Tactile “capture” of audition

Previous research has demonstrated that the localization of auditory or tactile stimuli can be biased by the simultaneous presentation of a visual stimulus from a different spatial position. We investigated whether auditory localization judgments could also be affected by the presentation of spatially displaced tactile stimuli, using a procedure designed to reveal perceptual interactions across modalities. Participants made left—right discrimination responses regarding the perceived location of sounds, which were presented either in isolation or together with tactile stimulation to the fingertips. The results demonstrate that the apparent location of a sound can be biased toward tactile stimulation when it is synchronous, but not when it is asynchronous, with the auditory event. Directing attention to the tactile modality did not increase the bias of sound localization toward synchronous tactile stimulation. These results provide the first demonstration of the tactilecapture of audition.     

When does visual perceptual grouping affect multisensory integration?

Several studies have shown that the direction in which a visual apparent motion stream moves can influence the perceived direction of an auditory apparent motion stream (an effect known as crossmodal dynamic capture). However, little is known about the role that intramodal perceptual grouping processes play in the multisensory integration of motion information. The present study was designed to investigate the time course of any modulation of the cross-modal dynamic capture effect by the nature of the perceptual grouping taking place within vision. Participants were required to judge the direction of an auditory apparent motion stream while trying to ignore visual apparent motion streams presented in a variety of different configurations. Our results demonstrate that the cross-modal dynamic capture effect was influenced more by visual perceptual grouping when the conditions for intramodal perceptual grouping were set up prior to the presentation of the audiovisual apparent motion stimuli. However, no such modulation occurred when the visual perceptual grouping manipulation was established at the same time as or after the presentation of the audiovisual stimuli. These results highlight the importance of the unimodal perceptual organization of sensory information to the manifestation of multisensory integration.     

The shapes associated with approach/avoidance words

People prefer curved and symmetrical shapes to their angular and asymmetrical counterparts. While it is known that stimulus valence is central to approach and avoidance motivation, the exact nature of the relationship between curvature/symmetry and approach/avoidance motivation still needs to be clarified. Experiment 1 was designed to investigate whether simple shapes are associated with approach and avoidance words. Participants found it easier to match more symmetrical shapes with approach words. In Experiment 2, symmetry was differentially associated with approach words and was rated significantly higher on the approach dimension than asymmetry. Next, we assessed whether object valence and object curvature (Experiment 3) or symmetry (Experiment 4) would lead to different associations to approach and avoidance words. Only object valence had a significant influence on participants’ ratings, with the positively-valenced objects being more closely associated with approach words than their negatively-valenced counterparts. These results highlight the complex relation between visual properties of objects, their valence, and appetitive and aversive categories.     

Socio-Cultural Determinants of Physical Activity among Latin American Immigrant Women in Alberta,Canada

Acculturation has been associated with decreased physical activity among immigrants. This study assessed the process of changing physical activity patterns within the context of Latin American immigrant women’s migration experiences to Canada. Using the ecological model of health promotion, we applied a mixed methods research design. Thirty-six Latin American immigrant women, 18 recent (<10 years in Canada) and 18 non-recent (>10 years in Canada), participated. Six focus groups and 14 in-depth individual interviews were conducted. The Godin Leisure-Time Exercise Questionnaire was administered. Overall, 86 % of the participants reported gaining weight since coming to Canada. Participants reported becoming more sedentary upon arriving in Canada. Only 27.3 % of recent and 41.7 % of non-recent immigrant women were considered sufficiently physically active. Lack of time, resources, social support, and migration stress were identified as key barriers to physical activity. Migration stress associated with social integration barriers strongly influence physical activity among Latin American immigrant women.     

Likability,Sex-role Congruence of Interest,and Competence: It All Depends on How You Ask1

Subjects were shown one of four videotaped versions of a male or female stimulus person (SP) being interviewed, the SP' s being Competent or Incompetent and Masculine or Feminine in their interests. All S s were asked to rate the SPs' likability on an objective questionnaire, those in one condition (Standard) immediately after viewing the tape, and in another (Projective) after first having responded to a series of open-ended, TAT-like questions about the SP. In the Standard condition, the major results were two highly significant effects-Competent SP s were liked better than Incompetent ones, and the Masculine Competent SP s more than their feminine counterparts. Several changes occurred in the Projective condition. Only profeminist women continued to prefer the Masculine Competent female SP to the Feminine Competent, the other group reversing their ratings. In response to the male SP s, profeminist males in the Projective condition preferred both Masculine SP s to the Feminine ones and, in comparison with other groups, exhibited a reduced competency effect.     

Single subject incomplete designs for nonmetric multidimensional scaling

Monte Carlo procedures were used to investigate the properties of a nonmetric multidimensional scaling algorithm when used to scale an incomplete matrix of dissimilarities. Various recommendations for users who wish to scale incomplete matrices are made: (a) recovery was found to be satisfactory provided that the “degrees of freedom” ratio exceeded 3.5, irrespective of error level; (b) cyclic designs were found to provide best recovery, although random patterns of deletion performed almost as well; and (c) strongly locally connected designs, specifically overlapping cliques, were generally inferior. These conclusions are based on 837 scaling solutions and are applicable to stimulus sets containing more than 30 objects.     

Social skills training with adolescent male offenders: I. Short-term effects

The effect of a social skills training programme consisting of instructions, modelling, role playing, videotaped feedback and social reinforcement, was examined in a multiple baseline design with five adolescent male offenders. Training led to specific improvements in certain target behaviours. It was found that, whereas improvements in the performance of certain skills such as appropriate eye contact could be brought about relatively quickly, certain listening skills proved much harder to train. Where training was effective in producing improvements in the performance of a skill, these changes were generally maintained at two weeks follow-up.