358 H. M. JOHNSON 



TABLE 3 — Continued 



G O 





Date -| „ |^ Remarks 



"0 .3 



> .3 ►jr'tn -7 ox: 



P*" C/3 <4 +3 *c o u 



Mar. 14 2.230 5 5 



" 14 1.561 5 5 



" 15 1.561 5 5 



" 15 1.301 5 5 



" 15 1.115 10 10 



" 16 1.115 5 5 



" 16 1.041 5 5 



" 16 0.975 10 10 



" 17 1.041 5 5 



" 17 0.975 5 5 



"17 0.940 10 9 Not punished. 



" 18 0.975 5 5 



" 18 0.940 5 5 



" 18 0.867 10 9 



" 19 0.940 5 5 



" 19 0.867 5 4 



" 19 0.822 20 17 Light charge on punishment grills. 



" 19 0.781 5 4 Frightened bv falling door; refused to work after 



trial 5. 



"20 2 . 230 5 5 Refused to work when width of striae was reduced. 



" 21 2.230 5 5 



" 21 1.561 5 5 



" 21 0.975 5 5 



" 21 0.867 10 10 



" 22 1.561 5 5 



" 22 0.975 5 4 



" 23 0.975 5 5 



" 23 0.940 5 4 Light charge on grills; not disturbed. 



" 23 0.867 10 8 



" 23 0.822 20 15 



" 23 0.940 5 5 



" 24 0.867 5 4 



" 24 0.822 • 10 9 



" 25 0.940 5 4 



" 25 • 0.867 5 4 



" 25 0.781 10 8 



" 25 0.743 10 7 



" 26 1.115 10 9 



" 26 0.867 5 5 



" 26 0.781 5 5 



" 26 0.710 10 7 



" 27 1.041 5 5 



" 27 0.822 5 5 



" 27 679 10 2 Irregular position choices without hesitation. 



" 27 1.041 5 5 Width of 0.710 taken as threshold value; subtends 



4' 4" of visual arc at distance given — 60 cm. 



