Sensory and Cognitive Factors in the Processing of Visual Velocity

Daniel Algom, Lior Cohen-Raz

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


A symmetrical 6 × 6 factorial design of distances and durations served to produce either 36 different moving stimuli (real movement condition) or 36 static displays separately containing the respective stimulus components (cognitive movement condition). Different metric rules underlay the two types of velocity judgments: Perceptual estimations of real movement obeyed a ratio model, whereas conscious estimations of implied movement obeyed an additive model. Valuation operations differed, too; the scales underlying real velocity were nonlinearly related to the even more compressive scales that underlay cognitive velocity. Implications of these results for velocity research are discussed.

Original languageEnglish
Pages (from-to)3-13
Number of pages11
JournalJournal of Experimental Psychology: Human Perception and Performance
Issue number1
StatePublished - Feb 1987


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