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3 groups of 36 Ss each made size judgments under objective, apparent, or projective instructions at different distances on different days. The variable test object was located 10 ft. from S, the standard test object at 10, 20, 30, or 40 ft. When the means for different Ss at the 20-, 30-, and 40-ft. locations of the standard were compared, there was no statistical evidence for a trend with distance, in spite of clear trends in the nonindependent means within the same Ss. In a similar experiment utilizing a much larger range of standard-to-variable distance ratios, Epstein (1963) found significant trends with distance in the independent means. We have previously suggested that systematic deviations from size constancy arise from a tendency on the part of Ss to make their size judgments conform to an assumed perspective relationship between the test objects. This hypothesis requires a steeper slope in the size-distance function for nonindependent size judgments as compared with the independent values and is not at variance with Epstein's results.

Gait classification is a developing research area, particularly with regards to biometrics. It aims to use the distinctive spatial and remporal characteristics of human motion to classih differing activities. As a biometric, this extends to recognising differentpeople by the heterogeneous aspects of their gait. This researrh aims to use a modijied deformable model, the temporal PDM, to disringuish the movements of a walking and running person. The movement of 2Dpoints on the moving form is used to provide input into the model and classih the type of gait present.

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