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Autokinetic Movement as a Function of Color

The results of Matin and Mackinnon ( 4 ) support the view that autokinetic movement (AKM) is related to involuntary eye movements. They suggest that the directionally sensitive cortical cells identified by Hubel and Wiesel ( 2 ) may be a neurophysiological basis for AKM. Stimulus intensity affects neither movement receptor discharge ( 1 ) nor AKM (6) . Differences between the brightness of the surround affect neither movement receptor discharges ( 5 ) nor AKM (6 ) . Movement receptor discharge is similarly unaffected by stimulus color ( 5 ) as is the latency of AKM ( 3 ) . Latency and extent of AKM, however, are not invariably related (6). The present study was designed to investigate the effects of stimulus color on the extent of AKM. Red, green, blue, and yellow filtered AK light stimuli were randomly presented in a dark room to 18 student Ss with normal color vision who had been "dark adapted" for 10 min. Each S reported any AKM seen by drawing the path of the light on an artist's pad placed before him. However, no reliable differences in the extent of movement were found among the four colors (red, M = 13.36 cm.; green, M = 14.00 cm.; yellow, M = 15.47 cm.; blue, M = 15.90 cm.) when a repeated measures analysis of variance was applied to the data (F = .91, df = 3 / 5 1, p = .50). These findings and those of Marone and Coutu ( 3 ) tend to support the hypothesis of Matin and Mackinnon ( 4 ) .