This study sought to determine to what extent learners can grasp the movement processes in a given exercise after seeing a sequence of photographs. The study subjects consisted of 360 students ranging from elementary school grade 1 to senior high school grade 1, who were tested for their ability to discriminate the movements of horizontal bar exercises by observing photographic sequences and motion video illustrating these exercises, in order to determine the effects of items 1 to 5 below on their rate of correct response to testing. The results were as follows: 1. Many or few pictures: The rate of correct responses of group A's subjects who observed sequential photographs which have many pictures, was significantly higher than that of group B's subjects. 2. Age of the subjects: The rate of correct responses rose rapidly up to elementary school grade 3. It continued to increase thereafter, but more slowly. 3. Movement structure observed: In responses based on live movements, rates of correct response to "kip" were significantly lower than for the other two movements, suggesting that the movement structure of "kip" is more complex than that of the others. 4. Repeated observation: Comparisons of the rates of correct response to first and second observations of exercise showed that the difference in the rate of correct responses to "kip" obtained from the first to the second observations was significantly higher than for the other exercises. This may imply that the other two exercises were too easy to produce significant differences in relation to the number of observation times. 5. Experience and skill: There was a complementary relationship between "sports experience" and "skill in forward upward circling" among the subjects. More specifically, a positive response to either "experience" or "skill" was associated with a higher likelihood of a positive response for the other factor. This may imply that the rate of correct response was influenced by "observation experience" proportional to previous movements experience or skills training. The results above suggest that the ability to grasp the flow of movements from sequence of still pictures, are compositely formed by various abilities, that "acquisition of the skill" and "sports experience", "observation experience", "development of the recognition ability", and so forth.