Microcomputer-based estimation of psychophysical thresholds: The Best PEST

• DOI: 10.3758/bf03202110
• Publication Date: 2011-01-23T19:42:58Z
• Authors: Harris R. Lieberman; Alex P. Pentland
• Keywords: Micro computer; Psychometric function; Computer program

A new, maximally efficient technique for measuring psychophysical thresholds (Pentland, 1980) has been implemented on the microcomputer. This PEST (parameter estimation by sequential testing) technique is the most efficient sequential parameter estimation technique possible, given that the form of the psychometric function is known. The technique is similar to but faster and more accurate than other staircase procedures and may be applied whenever staircase techniques are applicable. The “Best PEST” is easily implemented on the micro-computer; a BASIC program for the Apple II which does so is presented. The Best PEST is compared with other staircase procedures, including one recently implemented on a micro-computer (Corwin, Kintz, & Beaty, 1979).