Intentional Switching Between Bimanual Coordination Patterns

Previous theoretical and empirical work indicates that intentional changes in a bimanual coordination pattern depends on the stability of the bimanual coordination pattern (Kelso, Schotz, & Schöner, 1988; Scholz & Kelso, 1990). The present experiments retest this notion when online Lissajous displays are provided. Switching to and from in-phase and antiphase and to and from 90° and 270° were tested in Experiment 1. Participants were able to very effectively produce the 180°, 90°, and 270° coordination patterns although performance of the in-phase coordination task was even more stable. The data indicated that switching to in-phase from antiphase was more rapid than vice versa and that switching times between 90° to 270° were similar. Experiment 2 investigated switching between 1:2 and 2:1 bimanual coordination patterns. The results indicated that switching time was similar between the 2:1 and 1:2 coordination tasks and that increases in stability over practice resulted in additional decreases in switching times. This provides additional evidence that the attractor landscape is fundamentally different dependent on the type of information provided the performer. What remains to be done is to reconcile these results with the various theories/perspectives currently used to describe and explain bimanual coordination.     

Self-reported sources of stress in senior high school students

The main sources of stress reported by 423 Australian final-year high school students using the Academic Stress Questionnaire were school-related as expected. The highest sources of this stress were examinations and outcomes, too much to do, worry over future, making choices about career, studying for examinations, amount to learn, need to do well imposed by others, and self-imposed need to do well.     

Immediate breast reconstruction and psychological adjustment in women who have undergone surgery for breast cancer: a preliminary study

Current debate exists regarding the timing of reconstructive surgery following mastectomy for breast cancer, with research pointing in favour of immediate reconstruction. This cross-sectional study sought to compare the psychological outcome of breast cancer treatment in women who had either received mastectomy and immediate reconstruction using autogenous tissue (n?=?30), or mastectomy alone (n?=?34), and also determine adjustment factors in this population as a whole. Participants completed measures of depression, anxiety, body image, self-esteem, coping and perceived social support at a time point 3?-?15 months after initial surgery. No significant differences were revealed between the two groups on any of the outcome measures. Poor body image, low self-esteem, and a tendency to use coping strategies characterized by helpless/hopelessness and anxious preoccupation, rather than fighting spirit, were highly predictive of distress. Reasons for the lack of differences between the two groups are explored.     

Development of an abstract category representation for the spatial relation between in 6- to 10-month-old infants

Nine experiments examined the formation of an abstract category representation for the spatial relation between by 6- to 10-month-old infants. The experiments determined that 9- to 10-month-olds, but not 6- to 7-month-olds, could form an abstract category representation for between when performing in an object-variation version of the between categorization task. The results also demonstrated that 6- to 7-month-olds could form category representations for between in the object-variation version of the between categorization task but that such representations were specific to the particular objects presented. The evidence confirms that representations for different spatial relations emerge at different points during development, and suggests that each representation undergoes its own period of development from concrete to abstract.