The distracting effect of material reward: An alternative explanation for the superior performance of reward groups in probability learning

To determine whether the distraction effect associated with material rewards in discrimination learning can account for the superior performance of reward groups in probability learning, the performance of 144 school children (preschool, second, and fifth grades) on a two-choice successive discrimination task was compared under three reinforcement conditions (material reward, marker, and knowledge of results). The two events in the task had different frequencies of occurrence, as in probability learning, yet they appeared in a constant order to make 100% payoff possible. The subjects in the reward and marker groups learned the task more slowly, and the nonlearners among them used stereotyped alternation patterns to a greater degree than subjects in the knowledge-of-results condition. These findings suggest that a distracting effect of material reward is present in probability learning and may explain the superior performance of reward groups typically found in probability learning studies.     

The psychology of farming: A review of twenty-five years of research

If all of mankind is to have an adequate diet, we must both stabilize world population and increase markedly world food supply. Moreover, attaining any such increase in food supply may be as much a problem in vocational psychology (e.g. the skill, knowledge, openness to change, and motivation of farmers) as in agricultural technology. The purpose of this review is to further psychological work on agricultural productivity by listing and evaluating a cross-section of relevant articles since 1945. Because psychologists have largely ignored agriculture, most reviewed studies were conducted by other behavioral scientists. Studies are grouped according to three broad areas: (1) predictors of choice, success, and satisfaction; (2) adoption of recommended practices; and (3) communal agriculture.     

A two-phase model account of aversive classical conditioning performance in humans and rabbits

A two-phase model was applied to classical conditioning performance in man and rabbits. During phase 1, response probability remained constant. During phase 2, response probability generally increased, although one operator was sufficient for a majority of Ss and two operators were required for a minority of Ss. The latter Ss exhibited increases in responding after a CR trial and decreases in responding after a non-CR trial. The pattern of parameters was similar for man and rabbits. In man, increases in UCS intensity resulted in a decrease in the duration of phase 1 and an increase in the limit of the operators for those Ss requiring more than a single operator to describe performance during phase 2. The value of employing a model to describe the data and understand the effects of independent variable manipulation was discussed.     

The actor's behavioral history,his current role,and the divergence between actor and observer responsibility attributions

The actor's behavioral (High or Low) and role (High, Medium, or Low) respectability were varied in an actor-observer attribution study. A scenario described the actor's background combination of behavioral and role respectability and an event in which the actor participated. Subjects assigned actor and situational responsibilities to the event from their own viewpoint and from their perceptions of the actor's viewpoint. Subjects' awareness of the attributional divergence between actors and observers (Jones, E. E. & Nisbett, R. E. In Attribution: Perceiving the causes of behavior. New York: General Learning Press, 1971) and the information (public versus private) utilized by each were reflected in the results.     

Olfactory dysfunction in man: anatomical and behavioral aspects

We reviewed studies examining the olfaction of patients with brain damage for the purpose of discerning correlations between disordered structure and function. Patient samples included those with neurological disorders and neurosurgical interventions and recording of spontaneous or elicited neuronal activity. Brain areas involved in olfaction include the olfactory bulbs, the orbitofrontal and medial temporal cortices, the thalamus, and the amygdala. Despite recent advances in olfactory anatomy, understanding of how these structures are related to olfactory detection, discrimination, and recognition continues to be limited. Inadequate localization of brain lesions and lack of comprehensive behavioral assessment have thus far prevented a detailed account of the organization of olfaction in the human brain.     

Transfer of conditioned appetitive stimuli to conditioned aversive excitatory and inhibitory stimuli

The transfer of Pavlovian appetitive stimuli to Pavlovian aversive stimuli was examined in three experiments. In Experiment 1, rats received appetitive (Ap) conditioning designed to establish a flashing-light stimulus as either a CS+, CSo, or CS? for food, or to maintain it as a novel stimulus for US-alone subjects. Then, the stimulus was employed as a signal for weak shock in conditioned-emotional-response (CER) training. Both acquisition and extinction results showed that the ApCS+ facilitated and the ApCS? retarded aversive excitatory conditioning relative to the ApCSo and US-alone controls. Experiment 2 replicated the findings of Experiment 1 with both a moderate and a severe shock in CER training. In Experiment 3, different groups received the same appetitive conditioning as before, but to a flashing-light stimulus which was then employed as a signal for no shock in CER training. The ApCS? facilitated and the ApCS+ retarded aversive inhibitory conditioning relative to ApCSo and US-alone controls. Collectively, these findings establish that, in Pavlovian conditioning, transfer of an appetitive CS to an aversive excitor or inhibitor is facilitated by maintaining the initial conditioning contingency.     

An application of Strong's validity criteria to basic interest scales

E. K. Strong, Jr.'s (Vocational interests of men and women, Stanford, Calif.: Stanford Univ. Press, 1943) four propositions for interest-inventory validity andJ. L. Holland's (Making vocational choices: A theory of careers, Englewood Cliffs, N.J.: Prentice-Hall, 1973) hexagonal classification system were synthesized in order to adapt a traditional procedure for determining the construct validity of occupational interest scales to the validation of basic interest scales. The procedure was tested using a sample of 4035 males and 3671 females whose interest inventory results as high school students and whose majors as college seniors could be assigned Holland codes. Results of the study indicate that this procedure can be used to assess the construct validity of inventories using basic interest scales.