カメにおけるt迷路を用いた位置弁別問題での明るさを無関連手掛かりとしかつ運動負荷デバイスを取り付けた場合の逆転弁別学習に及ぼす過剰訓練の効果

Two groups of 11 pond turtles each were trained with right-vs.-left spatial discrimination problem to a criterion of 19/20 correct responses over two consecutive sessions in a T-maze. Then one group (CT) received the reversal, the other (OT) received a total of 150 trials of overtraining followed by reversal. A rubber-made curtain was attached near the choice point of the apparatus to prevent the subject from automatizing their movement, and an irrelevant brightness cue was presented in the goal throughout original and reversal learning. The results showed that Group OT did not reverse faster than Group CT despite of no difference between groups in terms of trials to criterion during original discrimination training, i.e., they did not show the overtraining reversal effect. The data are compared with those from our previous experiment with turtles and discussed in relation to the assumptions about a spatial discrimination derived from the two-process hypothesis.|1群11匹の淡水ガメがT迷路において左右の位置を関連次元とする空間弁別課題で訓練された。学習基準は連続する2セッション(1セッション10試行)で19/20の正反応である。そののち1つの群(CT)