The theory of planned behaviour and exercise: An investigation into the role of prior behaviour,behavioural intentions and attitude variability

This paper reports a prospective study which applied the Theory of Planned Behaviour (TPB) to the prediction of exercise behaviour over a six-month period. The study addressed a number of issues which have been identified in the literature on the TPB; these being the role of prior behaviour in the TPB, the distinction between desires and self-predictions, and the question of attitude variability. The findings showed prior behaviour to be the strongest predictor of exercise behaviour at six months. Contrary to expectations, the self-prediction measure was not found to be a better predictor of behaviour than the desire measure. Attitude variability was found to be related to perceptions of control. However, attitude variability was not found to moderate relationships between components of the TPB. The implications of the results for the development of the TPB are discussed.     

The correlation of feature identification and category judgments in diagnostic radiology

Expert and novice radiologists were given films accompanied by clinical histories that supported a diagnosis either of bronchiolitis or of normal. To provide a plausible task context, some films were radiologically unambiguous and were accompanied by histories consistent with them. For a set of radiologically difficult films from confirmed normal or bronchiolitis patients, fictitious normal or abnormal histories were counterbalanced with the films. The clinical histories affected ratings both of diagnosis and of features present on the difficult films. Thus, uncertainty about individual features evidently was affected by history, and features did not act as an independent source of information. The dependence of feature calls on an overall judgment was also suggested by intra-observer agreement in another study in which an explicit diagnosis was not requested. It is unclear whether the history increased discrimination between normal and abnormal films, or indiscriminately added evidence for or against the disease. Factors are discussed that make it appropriate for feature identification to be partially dependent on category identification.     

Interactionism revisited: Reflections on the continuing crisis in the personality area

The current status of the personality area is critically examined with the view that problems in the discipline voiced two decades ago are still prevalent. Recurring problems in the personality area have important ramifications for much of contemporary theoretical and applied psychology. The interactional approach to personality came to the fore in the 1970s and early 1980s as an explicit attempt to resolve a number of perceived weaknesses in the personality area. While it has become common for researchers to publicly advocate an interactional position, in practice little interactional research has been conducted recently. The historical developments of the trait and situationism models of personality research and relevant assessment issues are outlined. This history is of interest because it helps to illuminate why and how many current personality researchers continue to perpetuate problems in the personality area. The interactional model of personality is also examined. Finally, the development of an interactional model for the study of anxiety is examined as a specific example of the theoretical, research, and practical benefits of this approach.     

Coping with coping assessment: A critical review

The recent literature on self-report measures of coping reactions and strategies is reviewed and critically evaluated. Most of the coping research has focused on assessing several basic coping behaviours or reactions. These include dimensions such as task-oriented coping, emotion-oriented coping, and avoidance-oriented coping. In general, most of the coping scales that have been developed have a variety of psychometric inadequacies. This state of affairs has created at least two major problems in the coping literature: (1) The proliferation of problematic coping scales, sometimes measuring different constructs, makes it difficult to generalize from one population and/or one health problem to another. (2) Since psychometrically sound instruments are a precondition for studying the relationships among coping, personality, and health, scales with psychometric problems preclude obtaining valid and generalizable information about coping behaviour. Methodological problems in the area have seriously restricted the development of a systematic body of theory and empirical knowledge about coping.     

Unresolved Childhood Sexual Abuse: Are Older Adults Affected?

This article presents case studies and discussions regarding three observed characteristics of unresolved childhood sexual abuse in adult survivors over 65 years of age. Specifically, chronic depression, elder abuse, and the misdiagnoses of residual abuse trauma as dementia or mental illness are compared to parallel issues identified by researchers in younger adult survivors. A brief overview of the childhood abuse literature and recommendations regarding professional training, the development of new services, and additional research are included.     

Behavior analysis and education: An unfulfilled dream

This paper presents the author's view of why the promise for education visualized by early behavioral researchers is as yet unrealized. It points out that behavior analysis has had an important impact on special education but has had much less influence on teaching practice in regular classrooms. This is not seen as the fault of educators who have failed to embrace procedures developed by behavior analysts. Rather, the author contends, behavior analysts have failed to develop procedures that fit the ecology of the regular classroom. Those developed often require too much additional effort thereby punishing those who attempt their use. Another factor hindering widespread adoption is that behavior analysts have failed to disseminate their procedures and have not participated widely in undergraduate training of teachers. The paper concludes by noting that our success in special education provides a model for behavior analysts interested in regular education. By developing procedures that result in increased academic performance for entire classrooms without punishing the teachers who implement them, by making those procedures available commercially and by publishing in journals teachers read, and finally by participating more widely in undergraduate training, the unfulfilled dream of what behavior analysis has to offer education can be achieved.     

The perceptual analysis of structure from motion for rotating objects undergoing affine stretching transformations

In two experiments, we evaluated the ability of human observers to make use of second-order temporal relations across three or more views of an apparent motion sequence for the perceptual analysis of three-dimensional form. Ratings of perceived rigidity were obtained in Experiment 1 for objects rotating in depth that were simultaneously subjected to sinusoidal affine stretching transformations along the line of sight or in a direction parallel to the image plane. Such transformations are theoretically interesting because they cannot be detected by analyses that are restricted to first-order temporal relations (i.e., two views), but they can be detected by more conventional analyses of structure from motion in which second-order temporal relations over three or more views are used. The current results show that human observers can perceive stretching transformations of a rotating 3-D object in a direction parallel to the image plane but that they fail to perceive stretching transformations along the line of sight. This result suggests that human observers can make use of some limited second-order temporal information. This finding was confirmed in Experiment 2, in which we investigated the effects of several specific optical consequences of sinusoidal stretching transformations applied in different directions. The results indicate that observers may be sensitive to the sign of acceleration, but that. they cannot make use of the precise magnitude of second-order relations necessary to recover euclidean metric structure.     

The Influence of Retention Interval on the US Preexposure Effect: Changes in Contextual Blocking over Time

A number of studies manipulating the length of the interval between conditioning and testing indicate spontaneous recovery from overshadowing, suggesting that certain instances of overshadowing represent a deficit in memory retrieval rather than a failure of animals to form an association between the overshadowed stimulus and the US. The present series of experiments examined the influence of lengthening the retention interval on blocking, another stimulus selection phenomenon that is typically interpreted as an acquisition deficit. The results indicated that when subjects were tested shortly (3 days) after training conditioning to a taste blocked subsequent conditioning to an odor conditioned in compound with that taste (Experiment 1), whereas prior conditioning to an odor did not block subsequent conditioning to a taste conditioned in compound with that odor (Experiment 2). This pattern of results was essentially unchanged when testing occurred at a longer (21-day) retention interval. However, there was evidence of a US preexposure effect in Experiment 2 when subjects in the US ONLY control condition were tested at the 3-day retention interval, but not when testing occurred 21 days after conditioning. Experiments 3 and 4 examined whether this loss of the US preexposure effect over time might actually represent a change in the degree of contextual blocking as the retention interval is lengthened. Exposure to the conditioning context either during the interval between Phase 1 and Phase 2 of conditioning (Experiment 3) or prior to Phase 1 of conditioning (Experiment 4) alleviated this US preexposure effect suggesting that the loss of the US preexposure effect as the retention interval is lengthened observed in Experiment 2 is due to changes in the degree of blocking by contextual stimuli over time. The results are discussed in terms of differential susceptibility of forgetting of two functional roles played by a contextual stimuli in the current situation-context as a CS and context as a retrieval cue for other CS-US associations.