Duration discrimination
From Yost (1994)
¥WeberÕs Law? NO
¥Duration discrimination can be very acute - much better than 50-75 ms.
Duration discrimination thresholds go up as the duration goes up, but not at a constant rate as WeberÕs Law predicts.
Notice that people can discriminate very short differences in duration, much shorter than their performance in temporal integration would lead us to believe.