HUMAN BISECTION AT THE GEOMETRIC MEAN

Theoretical developments have proceeded relatively independently in the human and animal timing literatures, even though many of the issues addressed have been similar. In the animal timing literature, an influential model is Scalar Timing. There have been few direct applications of Scalar Timing to human timing. The main purpose of the present paper is to present human timing data from experiments designed specifically to evaluate Scalar Timing. A human analog of the animal bisection discrimination procedure was used. The human bisection data were consonant with Scalar Timing: bisection was at the GM of the two referent durations and psychometric functions superposed when normalized by the bisection point. © 1991.