Psypad: A platform for visual psychophysics on the iPad

Abstract

This article introduces PsyPad, a customizable, opensource platform for configuring and conducting visual psychophysics experiments on iPads without the need for any code development for the iPad. Stimuli for experiments are created off-line as a library of images. The PsyPad app (obtainable from the Apple App Store) presents the images according to either built-in, customizable staircase or method of constant stimuli procedures, mapping stimuli levels to images based on the image file names. On-screen buttons for responses are configurable and matched to "correct"using the image file name of any given stimulus. All actions are logged into a text file and sent to a specified server at the en..