TESTING THE SCALAR PROPERTY WITH INTERVAL REPRODUCTIONS
According to the scalar property for time, the variability to time ratio should be constant. The validity of this property was tested in a restricted range of durations (standard values from 1 s to1.9 s) with an interval reproduction method. Time intervals to be reproduced with finger tapping were presented with 2, 4, or 6 brief and successive auditory signals marking 1, 3, or 5 intervals, respectively. The variability to time ratio is not constant across the standard interval conditions (higher at 1.9 than at 1 s), and this violation to scalar timing does not interact with the number-of-interval variable.