Developmental and contextual risks of social physique anxiety among female athletes

In the present study, we examined developmental and contextual factors that may increase the odds of reporting higher social physique anxiety (SPA) among 404 adolescent athletes 11 to 16 years old. Findings showed older, later maturing athletes past peak height velocity and with greater body mass index (BMI) reported higher SPA. Individual aesthetic sport athletes were older at menarche, had lower BMI, and reported higher SPA. The odds of reporting higher SPA were 4.5 times higher (odds ratio = 4.61) for individual aesthetic sport athletes than for nonaesthetic sport athletes. Team aesthetic sport contexts were not implicated in SPA risk. Results are discussed in terms of self-selection away from individual aesthetic sports and the relevance of physical size and puberty in the SPA construct.     

Innovation and network structural dynamics: Study of the alliance network of a major sector of the biotechnology industry

We study the large-scale topology and dynamics of maps of alliances in a major segment of the biotechnology industry. The results point to the joint dynamics of network and innovation. The study demonstrates that the network is scale-free. Competition for links translates into a dynamic exponent that seems to follow the fitter-get-richer model of network growth, with preferential attachment to firms holding key technologies. This network also shows a small-world effect. This work highlights the strategic importance of understanding the growth dynamics and structure of collaboration networks for the building of leading positions in industries led by sustained radical change.     

Alternate eye suppression and reading ability: little or no effect

The relationship between visual disorders and reading disability has been a source of controversy. Although much has been written, few clear relationships have been established. This study examined a particular visual disorder, alternating the use of the eyes. It has been generally assumed in the professional literature that eye alternation has a negative impact on a child's ability to read and perform visual-motor tasks. To date, however, this assumption is without scientific validation. The purpose of this study was to determine whether alternating the use of the eyes does in fact have a negative effect on reading ability and on timed visual-motor tasks. Forty school-aged children, aged six to 14, were selected from the patient population of four ophthalmologists. Twenty alternators, whose ocular conditions were verified by ophthalmologic examination, were obtained. The control group was obtained by matching children with normal eye exams to the alternators. All subjects were given the WISC-R (Wechsler, 1974) and the Woodcock Reading Mastery Tests, Form B (1973). Results of the study indicated that the reading achievement of eye alternators was no different than it was for visually normal children. Also, alternators are no more likely to have difficulty with the visual-motor tasks. Although alternators may score poorly on vision screening tests, there is no indication that their visual problems will affect their school achievement.