[Sequential dependencies in judgments of horizontal line lengths: application of attention band theory]

The experiment of category judgments of horizontal line lengths was performed in three conditions of stimulus presentation sequence, in order to examine whether the sequential dependencies of this type might be explained with the attention band theory which Green & Luce (1974) proposed. Nine undergraduate students served the experiment as a subject, three for each condition. The multiple regression analyses presented that in all conditions the sequential dependencies extended over at least four trials, and the coefficient of variation of response ratio Rn/Rn-k (k = 1-4) also showed the same results. Although Jesteadt, Luce, & Green (1977) stated that the attention band of loudness continued only one trial, the results of this experiment suggested that the attention band of horizontal line lengths continued four trials.