Abstract
1. The author repeated the SHEFFIELD & TEMMER's escape-avoidance procedures (6) with one supplemental group (intermittent escape group). On the whole the same results were obtained (see Fig.2).
2. Intermittent escape group (group 3) received electric shock from the begining of land on at the trials in which the paired partner in the avoidance group failed to avoid shock, and were omitted shock entirely at the trials in which the partner succeeded to avoid. As shown in Table 2, group 3 showed faster locomotion than avoidance group at shock trials, and slower at no-shock trials. These differences are significant at 5%, 1% level, respectively (sign test). At shock trials, however, before the beginning of shock 1.5 sec. limited time has elapsed in avoidance procedure only. Values in brackets shows locomotion time from shock, not from land on. Then, locomotion speed becomes greater in avoidance group than group 3 (1% significance level). This implies that the limited time (no-shock) had some effects on locomotion response even at shock trials.
