Abstract
Skill is a kind of behavior obtained by means of exercise, and is composed of diversified abilities. The difference in skill between an expert and a novice stems from a variability in each component ability. The variability is considered to be related to changes in apportionment of attention, and further work is in progress to elucidate the cause of variability from the information processing viewpoint such as attentional fucus or prediction of attention. This review also deals with problems and applicability of researches on motor skill of experts.
