Velocity judgments of continuously moving and stroboscopically presented stimuli using magnitude and category scaling.
An experiment was conducted to determine whether perceived velocities of continuously moving targets and stimuli presented stroboscopically (in successively different positions) are processed by two different motion-sensitive mechanisms: one substitutive (metathetic), the other additive (prothetic). Male subjects made category scale and magnitude scale judgments of targets presented continuously and stroboscopically at five different velocities. When the magnitude scale data were plotted against the category scale data, linear relationships emerged, suggesting that in both conditions velocity perception is due to a substitutive process. The results are discussed in view of previous research and theoretical implications.
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