Volltext: Discrimination of Shades of Gray for Different Intervals of Time (19)

Discrimination of shades of gray for different intervals of time. 
21 
not infrequent use of the note »forgot«, i. e. he cannot deliver a 
judgment because the norm 
has passed out of mind. 
He has 69 of 
these »forgots« distributed as follows: 
V-= 160° 
170° 180° 
190° 
200° White 
Order N—V. . . 5 
12 15 
5 
6 
» Y—N. . . 4 
4 9 
7 
2 
total »forgot« 9 
16 24 
12 
8 
His forgotten norms follow accordingly the inverse order of the 
physical brightnesses, and as is to be expected, are more numerous 
in the t. o. N—V. 
With reagents who maintained practically fairly like conditions of 
relaxation or tension for all time intervals, we should expect different 
results, so far as the »like« cases are concerned. But in general, the 
writer would explain the results obtained in the above and in similar 
experiments: 
1. from the presence of contiguous reproduction, usually verbal, 
coming from the formation of a scale of values; 
2. from the presence of free judgments resulting also from the 
formation of a scale of values; 
3. from the relatively large number of judgments of »like« for 
the shorter intervals resulting from the maintenance of com¬ 
mon conditions during the periods of exposure of norm and 
comparison. 
In conclusion the writer desires to express his thanks to Prof. 
Külpe, Dr. Kinkel and Mr. Borgquist for their patient and valuable 
services as reagents, and to Mr. Thompson for his skillful manip¬ 
ulation of the apparatus.
	        
Waiting...

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