Abstract

56 males and 56 females (18-32 yrs.) were assigned to one of four treatment groups for each gender. Subjects were administered 100 trials using a Bassin Anticipation Timer with the stimulus runway approaching directly from the front. Subjects were blocked into near (NO), middle (MO), far occluded (FO), and unoccluded groups (UO). The NO group viewed all but the first 20 to 65 L.E.D.s on the stimulus runway. Lights 21-40 and 41-60 respectively were occluded from the view of the MO and FO groups. The UO group viewed all L.E.D.s. Subjects were also assigned to receive stimuli at 268 cm/sec (6 mph) or 402 cm/sec (9mph) within their NO, MO, FO, or UO groups. All runway sections were occluded for 330 or 220 msecs for the 268 and 402 cm/sec velocity respectively. This design enabled the analysis of the main effect of gender, velocity, and location of stimulus occlusion. Data were converted to absolute, variable, and constant error. A three factor (2X2X4) analysis of variance was performed on each of the three error type distributions, absolute, constant, and variable error (AE, CE, VE). The AE and VE analysis yielded significant findings for all three main effects. Males performed with less error than females. Significantly less error resulted under faster velocity conditions and error increased from UO to FO, MO, and NO conditions respectively. The AE and VE analysis also yielded significant interactions for gender by location of stimulus occlusion and velocity by location of stimulus occlusion interactions were significant. V.-Ref. (gek.)