Theoretical and empirical observations generally support Darwin's view that sexual dimorphism evolves due to sexual selection on, and deviation in, exaggerated male traits. Wallace presented a radical alternative, which is largely untested, that sexual dimorphism results from naturally selected deviation in protective female coloration. This leads to the prediction that deviation in female rath...

The spatial and temporal aspects of movement variability have typically been studied separately. As a result the relationship between spatial and temporal variabilities remains largely unknown. In two experiments we examined the evolution and covariation of spatial and temporal variabilities over variations in the duration of reciprocal aiming movements. Experiments differed in settings: In Exp...

OBJECTIVE To develop and determine the reliability of a newly -designed resistance-enhanced dynamometer for muscle strength measurement, and to test the hypothesis that enhancing the examiner's resisting force improves the reliability of manual muscle strength measurements. DESIGN An intra-examiner, inter-examiner, intra-session and inter-session reliability study. SUBJECTS Twenty-five men ...

Voice pitch (the perceptual correlate of fundamental frequency, F0) varies considerably even among individuals of the same sex and age, communicating a host of socially and evolutionarily relevant information. However, due to the almost exclusive utilization of cross-sectional designs in previous studies, it remains unknown whether these individual differences in voice pitch emerge before, duri...

OBJECTIVE To evaluate the effect of colporrhaphy on sexual problems of women with pelvic organ prolapseis. METHODOLOGY Sixty patients with pelvic organ prolapse (cystocele - rectocele) in a quasi-experimental study before and after treatment were included. Presence of pelvic organ prolapseis was assessed by examination in the lithotomy position. Degree of prolapse was determined according to ...