Vision Theory: Spatial and Temporal Factors

Abstract

The psychometric properties of seven temporal factors (TFT) and five spatial factors (SFT) tests were assessed in a sample of 20 undergraduates. Subjects completed six repeated measures sessions of the TFTs and four trials of SFTs. All tests except Neisser's letter search produced stable measures. Reliabilities ranged from .81 to .98 for Simultaneity, Flicker, Search, and Bistable Stroboscopic Motion and from .59 to .71 for Masking, Phi, and Dynamic Visual Acuity. Of the 70 possible correlations between spatial and temporal batteries (7 TFTs X 5 SFTs X 2 distances), only four were significant. The moderate to high retest reliabilities, combined with the negligible correlations between spatial and temporal tests suggest that the two processes are largely independent.