ON THE RELATIONSHIP BETWEEN PHENOMENAL SPACE AND PHENOMENAL VELOCITY

The hypothesis that changing the phenomenal distance traversed by a moving spot, while keeping the physical distance constant, should affect the phenomenal velocity in a like direction was tested by having the stimulus motion path bounded by Müller-Lyer figures. It was found that while these affected motion path length judgements in the same direction as static length judgements, they did not have a corresponding effect on velocity judgements. The Müller-Lyer figure producing a decreased length judgement was actually found to increase velocity judgements. Two possible explanations of this result were tested and the conclusion drawn that this increase could be due to the enclosing nature of the Müller-Lyer figure in question.