The relative efficiency of constant and varied stimulation during learning. II. White rats on a brightness discrimination problem.

1936 ◽  
Vol 22 (3) ◽  
pp. 365-374 ◽  
Author(s):  
W. F. Grether ◽  
D. L. Wolfle
Keyword(s):  
Relative Efficiency ◽  
Discrimination Problem ◽  
Brightness Discrimination ◽  
White Rats

Habit strength as a function of drive in a brightness discrimination problem.

1956 ◽  
Vol 52 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Eugene Eisman ◽  
Adele Asimow ◽  
Irving Maltzman
Keyword(s):  
Discrimination Problem ◽  
Brightness Discrimination ◽  
Habit Strength

Effect of Crowding and Litter Size on Several Behaviors of White Rats

1975 ◽  
Vol 37 (2) ◽  
pp. 599-606 ◽  
Author(s):  
Ellen Robinson
Keyword(s):  
Litter Size ◽  
Home Cage ◽  
Brightness Discrimination ◽  
Activity Wheel ◽  
Living Conditions ◽  
White Rats ◽  
Incentive Value ◽  
Competition For Food ◽  
Main Effects ◽  
Increased Activity

Rats from litters of 4, 7, or 11 were placed 1, 2, 3, or 4/cage till 60 days old. Litters of four were less active in an activity wheel than litters of 7 and 11 ( p < .05) and females were more active than males ( p < .01). Neither cage density nor litter size affected time to begin eating. Although main effects were not demonstrated in a brightness discrimination, there was a cage × sex interaction. Males housed 1/cage were slower to learn than multiply caged Ss. Possible interpretations are facilitative effects of crowding, increased incentive value of food due to home-cage competition for food, or increased activity need generated by crowded living conditions.

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