Speed 



Reciprocal of speed 



Speed 



Reciprocal of speed 



Speed 



Reciprocal of speed 



Fig. 1: Reaction distance (m) 

 as a function of speed of model 

 approach for different models. 

 A: medium white ellipse, 4 days 

 data lumped, mean = 1.23 +.13 m 

 (907c. confidence limits). Lines 

 are Bartlett regression lines 

 in all figures. 



B: small circle, 2 days data, 

 mean = 0.79 + 0.08 m 

 C: small square, 1 day. 

 mean = 0.94 + 0.04 m 



Fig. 2: Reaction time (sec) as a 



function of reciprocal speed of 



model approach for the same data 



as in Fig. 1. If reaction distance 



is independent of speed, the slopes 



of these lines should be equal to 



the mean reaction distances of fig. 1, 



and intercepts should be zero. 



A: medium white ellipse, 4 days 



mean slope = 0.77 + 0.35 m (90% limits) 



B: small circle, 2 days 



mean slope = 0.95 + 0.24 m 



C: small square, 1 day. 



mean slope = 0.97 + 0.10 m 



VI-205 



