No. 27. 



TABLE 10 



Flicker Perception 



Hatched: December 14, 1916. 



Sex: 9 



B 

 1 

 2 



3 

 4 



5 



6 



7 



8 



9 

 10 

 11 

 12 

 13 

 14 



15 

 16 

 17 

 18 

 19 

 20 



21 



22 



23 

 24 

 25 



26 (1) 



27 (2) 



28 (3) 



29 (4) 



30 (5) 



31 (6) 



♦32 

 34 



(7) 

 (8) 

 (9) 



35 (10) 



36 (11) 



37 (12) 



38 (13) 



39 (14) 



40 (15) 



TIME RELATION 



1-3 = 39" - 13' 

 for 50 flashes 



1-3 = 54 

 for 50 



'-18" 

 flashes 



1-2 = 36" - 18" 

 for 50 flashes 



1-2 = 40" - 20" 

 for 50 flashes 



Preliminary; no regular pro- 

 cedure. 



Ibid. 



Ibid. 



Ibid. 



+ source 50; — , 250 



+ , 70; — , 230. Time taken from 

 start to choice. Weak shock. 



+ , 80; -, 220. 



+ , 100 

 + ,120 

 + ,130 



-,200. 

 - , 200. 

 -,200. 



Upper 



Upper 



+ , 160; -,200 



Irregular variation between 150 



and 200. 

 Ibid. 



Right, 160; left, 200. 

 Right, 200; left, 160. 

 Right, 160; left, 200. 

 Ibid. 

 Right, 200; left, 160, 



illumination. 

 Ibid. First 5 choices correct; 



time 12". 

 Irregular variation. 



illumination, 

 Ibid. 

 Ibid. 



Right, 160; left, 200. 

 Right, 200; left, 160. 

 Upper illumination increased 



from 4 to 16 c.p. 4 c.p. 



lamp at top of middle of 



rear end of discrimination 



box. Errors in tests 3 and 



10. 

 Ibid. 



Rear light removed 

 Ibid. Errors in 3, 6, 7. 



Ibid. 



Ibid. 



Ibid. 



Ibid. 



Ibid. 



Ibid. 



Ibid. 



Ibid. Physically weak. 



Ibid. 



1915 

 12/21 



12/22 

 12/23 



12/25 

 12/27 



12/29 



12/29 



12/29 



12/30 



12/31 



12/31 



1/1/16 



1/1 



1/1 



1/1 



1/3 



1/3 

 1/3 



1/4 

 1/4 

 1/5 



1/5 

 1/6 



1/6 

 1/7 

 1/7 

 1/8 

 1/8 



1/8 



1/10 



1/10 



1/12 



1/13 

 1/14 

 1/15 

 1/17 

 1/17 

 1/18 

 1/20 

 1/20 



' Tests for specific or relative stimulus difi^erence; see table 17, page 99, and accompany- 

 ing text. The tests of series 32 (7) for evidence of relativity or specificity were dis- 

 tributed among the tests of subsequent series. 



73 



