Detection Thresholds as a Function of Interval Separation between Two Successive Targets

Detection thresholds for two successive targets varied systematically with the interval between the two puclses. At intervals of 10 to 30 milliseconds, and again at 80 to 200 milliseconds, the threshold was lowered as compared to that for a single target, while at a separation of 50 to 60 milliseconds, the threshold was raised.