Effects of vicarious consequences on imitation and recall: Some developmental findings

Two experiments were conducted using a multiple-item list in which each item consisted of a pair of pictures. The model indicated which member of each pair she preferred and was either positively reinforced, negatively reinforced, or received neutral consequences. The S then indicated his preferences (imitation test). Following the imitation test, each S was asked to recall the model's choices. Age was an independent variable in both experiments. Imitation scores of the children, preschool to sixth-grade age range, were strongly influenced by differential vicarious reinforcement. Vicarious reward increased imitation and vicarious punishment decreased it. College students' imitation scores were only minimally influenced by differential vicarious reinforcement. Within- and between-subjects variations of vicarious reinforcement had similar effects. Recall scores were surprisingly high and were not significantly influenced by differential vicarious reinforcement. Interestingly, age and percentage of correct recall were negatively correlated.     

The effect of self- vs. external-monitoring and locus of control upon the pacing and general adjustment of psychiatric inpatients

Ninety-six psychiatric inpatients with a history of problematic pacing were identified as internal or external (Rotter Internal-External Locus of Control Scale) and assigned to one of four monitoring categories: (1) self-monitoring, in which participants recorded their pacing on wrist counters, (2) external-monitoring, in which ward staff informed participants of their pacing, (3) social demand, in which participants were pressured not to pace, but without specific feedback concerning their pacing and (4) no treatment. Dependent measures included the number of cycles paced, distance paced, and staff rated general social adjustment (MACC scale). As hypothesized, internals showed greater reductions in pacing and increases in general adjustment scores in the self-monitoring condition and externals reducing pacing and improved general adjustment on the external monitoring condition. Both of the treatment conditions created greater positive change than the social demand condition.     

Effects of listener feedback on the messages of kindergarten children in a referential communication task

A referential communication paradigm was employed with kindergarten children to determine the effects of systematically varied feedback following inadequate message production. Feedback conditions included three levels of verbal specificity presented either alone or in combination with visual feedback. Results indicated that kindergarten children formulated more adequate referential messages when provided with either highly specific verbal feedback or a chance to view the listener's incorrect choice of referent. The differential effectiveness of various types of feedback was discussed in terms of the role of comparison activities in the referential communication process, and implications for the communicative competency of kindergarten children were considered.     

Comparisons of learning procedures: Effects of constant and random presentations

The retention interval hypothesis (Izawa 1972) was formulated on the basis of retention interval distributions given in random order to account for inconsistent performance differences between anticipation and study-test procedures, which have been regarded as a puzzle for nearly two decades. Under the anticipation procedure a presentation of the stimulus term of a paired-associate (a test event) is immediately followed by a presentation of both stimulus and response terms of the pair (a study event), whereas under the study-test procedure, study and test events are given on separate cycles. The retention interval hypothesis was specifically tested in a situation without any random distributions of the retention intervals i.e., under a constant item presentation order from cycle to cycle, in addition to random presentation orders, in a paired-associate learning experiment, using 80 college students. As predicted by the theory, significantly superior performances were obtained for the study-test method vis-à-vis the anticipation method also under a constant item presentation order. The constant presentation-order- arrangements significantly outperformed the random ones. Directions for further theoretical elaborations are suggested.     

Effect of sentence structure on stuttering

The elicited speech of 20 adult male stutterers was analyzed to determine the effect of the number, type, and location of relative clause structures on the frequency of stuttering. The selected structures were identified on the basis of transformational grammar. The findings indicate that the frequency of stuttering increases significantly with an increase in the number of relative clauses included in a matrix sentence structure. The results also indicate that the more severe the stuttering is, the more the stutterer is likely to be affected by this variable. Trends toward more frequent stuttering in the postverbal relative clause and the adjectival form of the relative clause were observed.     

Strategic encoding and retrieval processes in verbal recall among middle-aged and older adults

The authors used an analysis of individual differences to examine the role of executive control in strategic encoding and retrieval in verbal recall. Participants enrolled in the Louisiana Healthy Aging Study completed measures of working memory (WM), cognitive status, vocabulary, and free recall of words. Indices of clustering in free recall were calculated to permit inferences on strategic encoding and retrieval processes. We hypothesized that WM would be more strongly associated with strategic encoding and retrieval metrics than vocabulary based on the assumption that successful remembering requires executive control in WM. Regression analyses, together with a variance portioning procedure, confirmed that WM had comparable levels of unique and shared variance with the strategic encoding and retrieval metrics, and both exceeded vocabulary. Theoretical and clinical implications of these data are considered, with the suggestion of future research in lifespan samples as opposed to exclusively young adult or older adult samples.