[A examination of conversation process in social context].

The purpose was to reveal a set of conversation rule and to examine the effect of social context on the importance of the rule. We collected 51 items concerning conversation rule from 29 male and female undergraduates. Another 128 male and female undergraduates were asked to rate the importance of each item in given social contexts. We manipulated three factors of (a) goal orientation in conversation, (b) intimacy of a dyadic relationship, and (c) combination of sex, in the descriptions of the social contexts. Factor analysis of the rating scores led to identification of six factors of conversation rule: 1) acceptance rule, 2) rule for partner, 3) rule for accomplishment of speech, 4) rule for intention of speech, 5) emotion-directed expression rule, 6) comprehension-directed expression rule. The results of ANOVA indicated that the importance of each factor varies with social context.

Dynamic function of medial foot arch.

The purpose of this study was to analyse the dynamic function of the medical arch in the foot during walking. The change of the medical arch was measured by an "electro arch gauge" (EAG). The change of the medical arch, the angle of first metatarsophalangeal joint, ground reaction force and action potential of the tibialis anterior muscle, peroneus longus muscle, triceps surae muscle, abductor hallucis muscle, and the flexor hallucis muscle were measured simultaneously. In customary gait, the medical arch was stretched rapidly just after heel-strike and become longest at the early period of the foot-flat phase, then shortened gradually until about heel off. After that it was stretched slightly and shortened rapidly just before toe-off. Dynamic change of the medial arch occurred under a complex relationship of body weight, bone structure, ligaments and muscular force.