scholarly journals Feature-negative effect in rats’ discrimination learning in the runway

1983 ◽  
Vol 11 (3) ◽  
pp. 367-372 ◽  
Author(s):  
Steven J. Haggbloom
2009 ◽  
Vol 13 (2) ◽  
pp. 219-227 ◽  
Author(s):  
Lucy J. Hopewell ◽  
Lisa A. Leaver ◽  
Stephen E. G. Lea ◽  
Andy J. Wills

1976 ◽  
Vol 28 (4) ◽  
pp. 661-666 ◽  
Author(s):  
R. C. Morris

This experiment was designed to investigate the importance of autoshaping to a signal for reinforcement in the production of behavioural contrast. Two groups of pigeons were given discrimination training on a mult VI-EXT schedule: the stimuli present in the two schedule components shared common attributes, but were distinguished by the presence or absence of a visual feature. For one group (the feature positive group) the feature signalled the availability of reinforcement. For the other group (the feature negative group) the feature signalled nonrein-forcement, and for this group there was no stimulus element which unambiguously signalled reinforcement. The feature positive group showed a higher response rate during the VI component of the mult VI-EXT schedule than the feature negative group. This finding was interpreted as support for the autoshaping explanation of behavioural contrast. The results differed from those of Jenkins and Sainsbury (1969, 1970) in that both the feature positive and the feature negative groups showed discrimination learning.


1986 ◽  
Vol 24 (3) ◽  
pp. 217-218 ◽  
Author(s):  
Steven J. Haggbloom ◽  
Frank K. Sheppard

1974 ◽  
Vol 17 (3) ◽  
pp. 417-425
Author(s):  
Stuart I. Ritterman ◽  
Nancy C. Freeman

Thirty-two college students were required to learn the relevant dimension in each of two randomized lists of auditorily presented stimuli. The stimuli consisted of seven pairs of CV nonsense syllables differing by two relevant dimension units and from zero to seven irrelevant dimension units. Stimulus dimensions were determined according to Saporta’s units of difference. No significant differences in performance as a function of number of the irrelevant dimensions nor characteristics of the relevant dimension were observed.


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