Table 2.

Estimates of image angular velocity under different stimulus conditions

Experimental conditionTunnel width (cm)Pattern velocity (cm s-1)Mean flight speed (cm s-1)Estimated image angular velocity (deg. s-1)
Stationary patterns (data averaged over all spatial frequencies and contrasts except 0% contrast)22045.8239
Stationary patterns (random dots, data from the static region in Experiment 3)22054.5284
Stationary pattern (random dots, data from Experiment 1)32074.3265
Stationary pattern (random dots, data averaged from both conditions in Experiment 2)32060.1215
Stationary pattern (random dots, data averaged from both conditions in Experiment 3)32070.0251
Moving pattern (random dots, data from Experiment 1)327 (against flight direction)74.0287
Moving pattern (random dots, data from Experiment 1)3230 (against flight direction)59.7320
Moving pattern (random dots, data from Experiment 1)3237 (in flight direction)101.9227
Moving pattern (random dots, data from Experiment 1)3252 (in flight direction)123.4254