Figure	
  S1.	
  Gaze	
  in	
  two	
  representative	
  trials. 
Distance between the ball image and the point of gaze as a function of time. A)	
  Gaze	
  for	
  a	
  
participant	
  who	
  successfully	
  caught	
  the	
  projected	
  9ly	
  ball	
  (after	
  2.64	
  s);	
  B)	
  Gaze	
  for	
  a	
  
participant	
  who	
  indicated	
  that	
  the	
  projected	
  9ly	
  ball	
  was	
  uncatchable	
  for	
  her	
  (after	
  1.37	
  
s).	
  See	
  also	
  Movies	
  S1	
  and	
  S2,	
  which	
  show	
  scene	
  camera	
  recordings	
  of	
  these	
  trials. 
!!
0
75
150
225
0
0.5
1
1.5
2
2.5
3
Caught
Tracking
Other
Distance (pixels)
Time to catch (s)
0
0.5
1
1.5
2
2.5
3
Judged to be uncatchable 
Time to 'no' (s)
A
B

Keeping your eyes continuously on the ball while running for catchable and uncatchable fly balls.
Postma, Dees B W,den Otter, A Rob,Zaal, Frank T J M