Attempts to evaluate the hypothesis that rats are more hesitant to ingest novel-flavored substances while they are under the influence of a toxic agent than in the normal state. (Author/RK)

Article investigated the pattern of results for three series of tests in which monkeys were deprived of sight of their limbs from birth. (Author/RK)

Visual memory in monkeys was examined under four different conditions, each with a separate group. (Editor)

Predictions of two-stage learning theories were evaluated by measuring observing responses which produced the discriminative stimuli for .5 sec. (Editor)

This study is concerned with the transfer of learned helplessness from one aversive motivator, shock, to another, frustration. (Author)

While responses permitting no change in location are learned very slowly, responses that allow unambiguous flight from a dangerous location are learned very rapidly. Two experiments examine the possible reinforcing properties of the flight response in avoidance acquisition. (Author/RK)

Whether a stimulus compound is separable or integral has predictable consequences for several human information processing tasks. The purpose of these experiments was to explore the implications of this distinction for research in animal learning and the development of learning theory. (Author/RK)

Rats performed an intermittently reinforced operant response and received periodic presentations of a visual conditioned stimulus (CS) located either very near or far from the operant manipulandum. Findings suggest there are deficiencies in the general accounts of conditioned suppression that stress the motivational or emotional effects of…

The negative-contrast effect occurs when animals that are shifted from large to small reward temporarily drop below small reward control groups. The basic question asked here in three experiments was whether animals tested under a specific drive level will behave as though they expect a reward magnitude previously received, depending on the reward…

Assesses the validity of physiological versus learning interpretations of illness-preexposure effects. (Author/RK)

Demonstrates that preexposure to uncorrelated presentations of noises and shocks when rats are not permitted to respond interferes with the acquisition of both conditioned emotional response and signaled punishment suppression. (Author/RK)

If animals receive inescapable electric shocks, their subsequent avoidance-escape learning is poor. This phenomenon, which can be called "the interference effect", was studied in four experiments. (Editor)

Investigates how the inhibition and latency-reduction effects interact with each other and how they change with changes in the intensity of the startle-eliciting stimulus. (Author/RK)

Comments on Maier and Seligman's research (EJ 138 911) on learned helplessness, specifically on their analysis of alternatives to the learned helplessness hypothesis. (Author/RK)

Four experiments, all employing the conditioned suppression of licking in thirsty rats, examined the extent to which reinforcement of one component, A, of a compound conditioned stimulus, AB, would "block" conditioning to the other element, B, on the first compound trial. (Editor)