Increase in retention of a taste aversion by weanling rats after a long interval

Weanling rats were tested for retention of an aversion to a novel flavor (chocolate milk) that had been conditioned as a single-element conditioned stimulus (CS) or in compound with a novel ambient odor (banana). The presence of the ambient odor during conditioning had no effect on flavor aversion shortly thereafter, confirming previous results. The flavor aversion observed 21 days after conditioning, however, was significantly stronger for pups conditioned with the single-element CS than for those given the flavor-odor compound as the CS. This retention effect was due to a surprisingincrease in the conditioned aversion observed 21 days after conditioning with the single-element CS. A second experiment confirmed this paradoxical increase in retention of the aversion to chocolate milk. This experiment also verified that no such increase occurred in retention of the conditioned aversion to a different flavor (saccharin), whether the initial aversion was strong or weak. The results may be explained in terms of generalized latent inhibition from consumption of mother’s milk.     

Concept learning by pigeons: Matching-to-sample with trial-unique video picture stimuli

Pigeons were trained to match-to-sample with several new methodologies: a large number of stimuli, computer-drawn color picture stimuli, responses monitored by a computer touch screen, stimuli presented horizontally from the floor, and grain reinforcement delivered onto the picture stimuli. Following acquisition, matching-to-sample concept learning was assessed by transfer to novel stimuli on the first exposure to pairs of novel stimuli. One group (trial-unique), trained with 152 different pictures presented once daily, showed excellent transfer (80% correct). Transfer and baseline performances were equivalent, indicating that the matching-to-sample concept had been learned. A second group (2-stimulus), trained with only two different pictures, showed no evidence of transfer. These results are discussed in terms of the effect of numbers of exemplars on previous failures to find concept learning in pigeons, and the implications of the positive finding from this experiment on abstract concept learning and evolutionary cognitive development.     

New Technology and Educational Television

The first part of the article provides a historical account of the broad phases of development that educational television has passed through as a result of social and technological influences:

• its beginnings in broadcasting in the fifties and sixties;

• its development through the video age in the seventies and eighties, with widening scope and opportunity as a result of developments in production and reception/recording equipment and an expansion of communication channels;

• its present potential, at the dawn of the interactive age, as a result of the influences of new technology.

The article then examines the problems of integrating new television‐related technologies into the educational system and draws attention to:

• the frequent past failures of the educational system to fully exploit new technologies, resulting in superficial integration and ineffectual use;

• the current tensions between the traditional educational technology approach and the drives behind much new technology;

• the need for appropriate systems and structures to ensure that the evaluation of such new technologies is properly resourced and effectively carried out.

     

Development of the attitude toward science in school assessment and its use to investigate the relationship between science achievement and attitude toward science in school

There is much interest in science courses in high school and student attitudes toward those courses. A valid and reliable instrument that measures such attitudes is not available. This study first developed and validated the Attitude toward Science in School Assessment (ATSSA). The instrument was used to evaluate the relationship between such attitude and achievement in science. A low correlation was found between attitude and various achievement tests. A moderate correlation was found between attitude and achievement that included an evaluation of the quality of work, as in a course grade.     

Incidence and situational factors surrounding sexual assault against delinquent youths

This study reports the results of extensive interviews with an intact sample of moderately delinquent adolescents concerning their sexual assault histories. Findings indicate a surprisingly high incidence of victimization among the females interviewed which, the authors suggest, may characterize the larger population of delinquent females. The behavioral-situational contexts of reported victimization experiences are examined for salient commonalities and the following composite rape scenerio can be cast from the data: An unsupervised, 14-year-old female, who has been consuming alcohol or marijuana, is sexually assaulted, following threat and/or force, to the point of penile-vaginal penetration, by an older male friend or acquaintance (who has also consumed alcohol or marijuana) in his home or vehicle or other place where she is inherently unprotected. Some comments are offered concerning the requirements of an effective technology of child rape prevention.