The gradient of delay of secondary reward in avoidance learning tested on avoidance trials only

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Using a shuttle-box, delay of CS-termination was varied on avoidance trials only. In one experiment, continued for 100 trials, acquisition of the avoidance response was a declining monotonic function of CS-termination delay through the range from zero to 5 sec., but a 10 sec. delay group did differ significantly from the 5 sec. group. When CS-termination was varied only on the first avoidance trial, the number of escape trials between the first and second avoidance trial was also a monotonic function of CS-termination delay. “The data, demonstrating the effects of a single trial, support the assumption that delay of CS-termination is a delay of secondary reward.” (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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