抄録
In this paper, the mechanism of occurrence of blocking was investigated by examining such items of blocking in serial performance as frequency, occurring position, positional relation to other observations and periodical reaction time delay. One-hundred and eleven students served as subjects. Several measurements were taken in simple color naming (as a comparatively easy task) and competitive color naming (as a complicated task). The results showed; that (a) some blockings occurred even in the former task though fewer than the latter, (b) frequency increased in the later stage of performance, (c) positional relationship to error was observed, and (d) reaction time delay occurred periodically as every fifth or tenth naming. These findings apparently support the present viewpoint that blocking is the manifestation of a rather positive adjusting function.
