Constraints on Pavlovian conditioning of the pigeon: Relative conditioned reinforcing effects of red-light and tone CSs paired with food

Recent Pavlovian conditioning experiments presented all possible CS-US combinations of red-light and tone CSs and food and shock USs to separate groups of pigeons. Pigeons receiving shock USs demonstrated conditioned head raising followed by prancing to both CSs, but CRs were acquired more rapidly to tone than to red light. Although pigeons receiving food USs rapidly acquired a conditioned response of pecking to the red-light CS, there was no evidence of conditioned responding in groups receiving tone-food pairings. This outcome left open the possibility that Pavlovian pairings of tone and food may have resulted in association formation that was not revealed in performance. The present series of experiments attempted to reveal that association, using an indirect method of assessment, conditioned reinforcement. Experiment 1 demonstrated that both red light and tone paired with food became positive conditioned reinforcers, suggesting that an association between tone and food was formed in the same number of Pavlovian conditioning trials that previously failed to yield any direct evidence of conditioning. Experiment 2, which presented fewer conditioning trials, revealed that the tone-food association was formed less rapidly than the red light-food association. Experiment 3 demonstrated that the observed outcomes were not attributable to unconditioned, rather than conditioned, reinforcing effects of the Css.     

Extinction of the context and latent inhibition

The hypothesis that latent inhibition could be reduced by extinguishing the experimental context, that is, exposing the rats to the context between exposure to the conditional stimulus (CS) and conditioning, was tested. All experiments used the conditioned emotional response procedure. In Experiment 1, extinction was not effective when the animals were exposed to the clicker 40 times off the baseline of responding for food and when the clicker CS was partially reinforced with shocks during the test phase. In Experiments 2 and 3, latent inhibition could be reduced by extinction if the animals were exposed to the CS 24 or 16 times on-baseline, and if continuous reinforcement was used during the test. In Experiments 4, 5, and 6, we attempted to determine which variable was responsible for the discrepant results. In Experiment 4, extinction was effective with 20 or 40 on-baseline exposures to the CS, using continuous reinforcement during the test. In Experiment 5, extinction was not effective with exposure on- or off-baseline, using 24 exposures and partial reinforcement. Finally, in Experiment 6, extinction reduced latent inhibition using continuous, but not partial, reinforcement with 40 exposures off-baseline. From these results, we concluded that Wagner's model of habituation was not sufficient to account for latent inhibition and that a hybrid model, using both associative and cognitive representational processes, was necessary.     

The vocational side of a new start in life: A career model of immigrants

The research tests a career model of immigrants with the following stages: crystallization, vocational retraining, job entry and trial, establishment, and maintenance. Two samples of immigrants, one consisting of 89 newcomers and another consisting of 60 white-collar workers with an average seniority of 5 years in the country, are followed up during a period of 2 years, after initially taking a test battery measuring vocationally relevant traits. Dependent criterion variables are occupational government examinations and adjustment to the job. Smallest space analysis is used to construct the career space of the newcomer cohort, and multiple regression of criterion variables on success predictors was performed. Both methods confirmed the model. The need arose to reconsider the duration of career stages of immigrants and their link to certain ages in comparison to the models in use. The research brought into focus the continuity of the process of career reconstruction after the interruption of vocational activity caused by emigration.     

Congruence between personality type and environment type as a predictor of stay in an environment

Following Holland's (Making Vocational Choices: A Theory of Careers. Englewood Cliffs, N.J.: Prentice-Hall, 1973) congruence hypothesis, the independent variable in this study is the level of congruence between the personality type of the subjects and the modal personality type in their environment. This variable is hypothesized to predict the two criteria of the study—the inclination to stay and the social acceptance of 71 couples from three settlements. Results show that (a) in each settlement the modal personality type of males is not similar to the modal personality type of females; (b) the correlation between congruence level and inclination to stay in the settlement is .44 (n = 142, p < .01); and (c) the correlations between congruence level and social acceptance are low and not significant. Theoretical and practical implications of the findings are discussed.     

Sequential consistency and subjective clustering in the multitrial free recall of children

The organization imposed by children on lists presented in a multitrial free recall task was investigated in two experiments. In the first, 6 and 9 year olds were tested for multitrial free recall of an unstructured noun or mixed list, followed by two sorting trials. Organization was quantified using two structurally comparable indices. One was an index of subjective clustering, based on individual word groupings determined in the sorting trials, and the other was an index of the sequential consistency of recall order over successive trials. The older children had significantly higher scores on recall and subjective clustering but there was no age effect on sequential consistency. In the second experiment 6, 8 and 10 year olds were tested for multitrial free recall of line drawings of common objects. Two sorting trials followed and organization was quantified using the subjective clustering and sequential consistency indices. Recall and subjective clustering scores again showed significant increases with age. As before, no age effect on sequential consistency was found. The results were interpreted in terms of a differential sensitivity of the two indices to an age-related qualitative change in the basis of organization.     

Word age-of-acquisition and lexical decision making

This paper reports two experiments concerning the effects of word age-of-acquisition and other word attributes on speed of lexical decision. Analyses of group average data indicated that word length, frequency and familiarity were the major determinants of decision speed. Previous reports of age-of-acquisition effects on lexical decision are attributed to failures to control for word familiarity.     

Information availability,goodness of outcome,and attributions of causality

H. H. Kelley's (American Psychologist, 1973, 28, 107–128) framework for studying attribution processes is introduced as a means of accounting for characteristic asymmetries in success/failure attributions. It is argued that while success/failure asymmetries should occur in the presence of single-observation information, asymmetries should be eliminated when individuals are allowed to observe the covariation between their own actions and outcomes. Subjects participated in a 15-trial stock market simulation in which type of information (single-observation or covariation) and goodness of outcome (relative success or failure) were manipulated. The obtained results supported the experimental hypotheses. Given single-observation information, subjects were more likely to accept personal responsibility for good than for poor outcomes. However, subjects' attributions were not affected by goodness of outcome when they were provided with covariation information. The implications of these findings are discussed in terms of the current debate between motivational and information-processing explanations of asymmetries in success/failure attributions.     

The effects of a salient self-schema on the evaluation of proattitudinal editorials: Top-down versus bottom-up message processing

The effects of a salient self-schema on message evaluation were studied. Subjects were identified who characterized themselves using trait adjectives that reflected the prototype of either a “religious” or a “legalistic” person. Equally persuasive sets of proattitudinal messages were developed empirically using weak arguments. Half of the messages were developed to reflect a “religious” perspective on the issue (capital punishment, abortion) whereas half were developed to reflect a “legalistic” perspective on the issue. Religious and legalistic subjects were then exposed to religious or legalistic arguments supporting an equally acceptable position (e.g., eliminating capital punishment). Afterward, subjects evaluated the persuasiveness of the communication and listed their thoughts as part of a “curriculum development project.” Results suggested that subjects when exposed to a schema-relevant message arguments for a position in which they believed were more positive about the quality of the message arguments and in their cognitive responding. These data extend the heuristic value of selfschemata to the area of attitudes and suggest that cognitive responses in persuasion are subjectively rather than objectively rational.