The Psychophysics Toolbox* DAVID H. BRAINARD** Department of Psychology, University of California in Santa Barbara, Santa Barbara, CA 93106, USA Received 4 January 1996; revised 26 August 1996; accepted 26 August 1996 Abstract-The Psychophysics Toolbox is a software package that supports visual psychophysics. Its routines provide an interface between a high-level interpreted language (MATLAB on the Macintosh) and the video display hardware. A set of example programs is included with the Toolbox distribution. 1. INTRODUCTION The attraction of using computer displays for visual psychophysics is that they allow software specification of the stimulus. To provide the required precision, experimental programs are usually written in a low-level language (e.g. C or Pascal). Although these languages provide power and flexibility, they are not conducive to rapid pro- gram development. Interpreted languages (e.g. LISP, Mathematica, or MATLAB) are abstracted from hardware details and provide friendlier development environments. Most interpreted languages are not designed to support psychophysics, however, and do not allow precise stimulus specification. The Psychophysics Toolbox is a software package that adds this capability to the MATLAB application on Apple Macintosh computers. MATLAB is a high level interpreted language with extensive support for numerical calculations (The MathWorks, 1993). The Psychophysics
Spatial Vision (continued as Seeing & Perceiving from 2010) – Brill
Published: Jan 1, 1997
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