The present study discusses the impact of union and parenthood transitions on individuals' self-esteem and sense of mastery development from midadolescence to young adulthood by using multilevel analyses with longitudinal data of 7,339 individuals between ages 15 and 38. The results show that, first, individuals in marital unions show significantly greater rates of growth in self-esteem and sense of mastery, compared with singles. Therefore, entering into marriage provides greater protections to individuals' self-esteem and sense of mastery. Second, the transition to parenthood brings significant decreases in levels and increases in rates of change in self-esteem and sense of mastery among new parents. The degree of the aforementioned changes differs by new parents' gender, union status, and living arrangement with the child at childbirth. Women are influenced more negatively than men. Living with the child at childbirth reduces the degree of decreases in self-esteem and sense of mastery, especially for mothers. In sum, from midadolescence to young adulthood, the development of individuals' self-esteem and sense of mastery is shaped by their union and parenthood transitions. Moreover, the context where these transitions take place, including the type of union and the living arrangement, moderates the degree of the impact. Our findings have important implications for research and practice in promoting the family transition experience.
The measurement of palmar abduction strength of the thumb (PAST) is often used as a research tool to provide an objective assessment of thenar muscle function in patients with carpal tunnel syndrome (CTS). The purpose of this study is to determine the effect of blocking radial abduction on PAST in a normal population. PAST was measured for both hands of 100 healthy volunteers in two positions. In the first position a vertical board was placed perpendicular to the radial border of the hand to block radial abduction, and in the second position PAST was measured without the board. Men had greater PAST. There was no difference in PAST between the dominant and non-dominant hand for both men and women, when a vertical board was used. Without the board, the values were significantly greater in the dominant hand. Radial abduction should be blocked during measurement of PAST.
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