Effect of Novelty on Choices Made by Preschool Children in a Simple Discrimination Task

1964 ◽  
Vol 35 (4) ◽  
pp. 1257 ◽  
Author(s):  
Frances M. Greene
Keyword(s):  
Preschool Children ◽  
Discrimination Task ◽  
Simple Discrimination ◽  
Simple Discrimination Task

scholarly journals RNA induced enhancement of a simple discrimination task

1968 ◽  
Vol 12 (7) ◽  
pp. 295-296 ◽  
Author(s):  
Robert G. Gibby ◽  
David G. Crough ◽  
Samuel J. Twios
Keyword(s):  
Discrimination Task ◽  
Simple Discrimination ◽  
Simple Discrimination Task

The Perky Effect Revisited: Blocking of Visual Signals by Imagery

1969 ◽  
Vol 28 (3) ◽  
pp. 791-797 ◽  
Author(s):  
Sydney Joelson Segal ◽  
Pearl-Ellen Gordon
Keyword(s):  
Discrimination Task ◽  
Visual Signals ◽  
Simple Discrimination ◽  
Mental Images ◽  
Simple Discrimination Task ◽  
External Stimuli

Perky's 1910 observation that mental images were indistinguishable from external stimuli is considered as two issues: (1) description of images which apparently resemble the unidentified stimulus, has been given, but not satisfactorily measured; (2) poorer detection of ambiguous signals while experiencing images, has been consistently demonstrated. While distraction may play some role, the critical finding was with sensitivity ( d′), which was highest in a simple discrimination task, intermediate when Ss were told both to describe imagery and detect the signals, and poorest when they lacked information that signals might be present during imaging and relied on retrospective judgments (Perky replication). In the intermediate task, alerting Ss to the signals by having them project the slides themselves, did not alter sensitivity or bias (Lx).

scholarly journals Narrow Versus Wide Tuning Curves: What's Best for a Population Code?

1999 ◽  
Vol 11 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Alexandre Pouget ◽  
Sophie Deneve ◽  
Jean-Christophe Ducom ◽  
Peter E. Latham
Keyword(s):  
Discrimination Task ◽  
Tuning Curve ◽  
Technical Analysis ◽  
Common Belief ◽  
Simple Discrimination ◽  
Population Code ◽  
Tuning Curves ◽  
Simple Discrimination Task ◽  
Better Than

Neurophysiologists are often faced with the problem of evaluating the quality of a code for a sensory or motor variable, either to relate it to the performance of the animal in a simple discrimination task or to compare the codes at various stages along the neuronal pathway. One common belief that has emerged from such studies is that sharpening of tuning curves improves the quality of the code, although only to a certain point; sharpening beyond that is believed to be harmful. We show that this belief relies on either problematic technical analysis or improper assumptions about the noise. We conclude that one cannot tell, in the general case, whether narrow tuning curves are better than wide ones; the answer depends critically on the covariance of the noise. The same conclusion applies to other manipulations of the tuning curve profiles such as gain increase.

Transfer of Training after Fading and Standard Discrimination Training

1974 ◽  
Vol 39 (2) ◽  
pp. 799-806
Author(s):  
Susan Ilene Taub ◽  
Thomas L. Whitman
Keyword(s):  
Preschool Children ◽  
Discrimination Training ◽  
Transfer Of Training ◽  
Discrimination Task ◽  
Dominant Dimension ◽  
Discrimination Group ◽  
Better Than

Standard discrimination and fading techniques were utilized to teach preschool children a two-choice discrimination task in which their non-dominant dimension (color or form) was relevant for solution. The fading group performed better than the standard discrimination group on both an initial and a later generalization-discrimination task. On the generalization task, the superiority of the fading technique was limited to form-dominant Ss. When retested for dimensional dominance after 1 wk. fading significantly decreased Ss' choices of their previously dominant dimensions while the standard discrimination trained Ss showed no change in preference.

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