Three experiments were performed to test the assertion that attractiveness of novel or complex stimuli has confounded experiments on the relative importance of S+ and S- in discrete-trial discrimination. (Editor)

The experiments reported here investigated a developmental change in frequency generalization in the hatchling chicken. (Author)

An analysis of two paradigms suggests that predictions in regard to the effects of stimulus preexposure must take into account not only the novelty of the stimulus, but the relationship of that novelty to that of the environment at the time of testing. (Editor/RK)

A quantitative model is presented for understanding self-control and impulsiveness involving aversive events. Four experiments were conducted to test the model's adequacy in predicting how delay until punishment and duration of punishment affect choice. (Editor)

Analyzes the temporal features of the transient unconditioned stimulus preexposure effect observed by Cannon (EJ 123 672) and attempts to determine whether a preconditioned stimulus toxin presentation can both condition a backward taste aversion and interfere with the development of a forward aversion. (Author/RK)

Three experiments carried out second-order Pavlovian conditioning using either similar or dissimilar first-and second-order stimuli. All three experiments were designed to identify the effects of similarity upon conditioning as distinct from its effects upon sensitization or stimulus generalization. (Editor/RK)

This research used tasks analogous to Delayed Matching-to-Sample tasks to study pigeons' Short Term Memory for responses and reinforcers, as well as for more conventional stimuli. The broad question is whether stimulus, response, and reinforcer memories are all influenced in the same way by the same independent variables. (Author/RK)

Investigates memory capacity in rats for information about spatial location and provides information about some of the characteristics of the storage process used in this memory. (Author/RK)

Four experiments examined the possibility that the outcome of simultaneous and backward fear conditioning procedures might depend upon the number of conditioned stimulus-unconditioned stimulus pairings. (Editor/RK)

These experiments are addressed specifically to the question of whether transituational transfer of immunizing and therapeutic effects will occur when these procedures involve responses and settings which are very different from those used in final testing. (Author/RK)

An internal scale of 17 behavior categories was constructed from data on 120 pairs of rhesus monkeys while they were establishing a social relationship. Data were obtained by a procedure analogous to that used in human psychophysical scaling. (Editor)

A series of 13 experiments employing mice systematically investigated shock-elicited activity in a circular field and escape performance in a shuttle box following exposure to either escapable or inescapable shock. Results show that escape interference induced by inescapable shock may be comfortably interpreted in terms of a decreased tendency for…

Suggests use of the planarian D. Dorotocephala, an animal 20 mm in size, in order to provide inexpensive lab experiences for students in large introductory psychology courses. The animal can be used to study perception, memory, behavior modification, and group processes. (Author/AV)

Psychophysical procedures provide the simplest method for studying time discrimination of animals. This experiment examines the psychological threshold of rats in estimating the time of occurrence of an event and how they adjust their behavior accordingly. Further research may determine the theoretical implications for both animals and people.…

The ventral eye of "Limulus" (horseshoe crab) contains only one type of photoreceptor. Behaviors mediated by the ventral eye provide an unambiguous representation of the function of that single-receptor type. Compares such behaviors with results of acute, single-cell investigations to assay for the contributions of candidate neural codes in the…