When objects lose their meaning: what happens to their use?

The 8 patients involved in this study were impaired on tests assessing knowledge of objects and on the demonstration of their use. The patients' success in object use was significantly correlated with their knowledge about the objects, providing further evidence that conceptual knowledge plays a key role in object use. Having a recipient present improved performance in the moderately impaired patients, suggesting that a certain level of conceptual knowledge must remain for the additional information to be beneficial. Although overall accuracy in using the target objects was not related to our measures of affordance, the specific aspects of use afforded by the objects' structures were relatively impervious to semantic impairment, suggesting a role for affordance information when object-specific knowledge is disrupted. The patients' familiarity with the objects was an important predictor of performance. Finally, despite good performance on tests of mechanical problem solving, the patients showed very little evidence of employing these skills in their interactions with real objects.     

Plasticity for recovery, plasticity for development: cognitive outcome in twins discordant for mid-childhood ischemic stroke.

Cognitive and language profiles in a set of likely monozygotic 13-year-old twins raised together and discordant for an extensive left hemisphere stroke are described 6 years post-stroke. Recovery differed across four skill profiles, created based on a model of plasticity. Full recovery of lost skills and full or partial development of new skills typically involved either semantic memory or right hemisphere lateralized functions such as visual perception skills. Limited development of new skills and full or partial recovery of lost skills took place in either active verbal memory or oral language skills that are left hemisphere lateralized. Language skills concerned with real-time lexical retrieval, or the use and understanding of morphology and grammar, phonological processing skills, and auditory working memory were least likely to recover and continue to develop.     

On the generality and limits of abstraction in rats and humans

In this review, we address the question, central to cognition, of whether nonhuman animals such as rats are capable of extracting and extending information from a given learning situation to a new learning situation without generalizing through a physical dimension of the stimuli. This capacity underlies abstraction, which is a hallmark of human cognition and necessary for complex information processing such as language acquisition. We selectively review recent experiments with rats in which systematic changes in information processing of new stimuli are observed after training with different stimuli. These results strongly suggest that this capacity is present in rats. We also review two articles in which clear limitations to this capacity are detected. We conclude that, within specified limits, rats are capable of using prior experience when faced with a learning situation that involves new stimuli. We interpret this ability as a rudimentary form of abstraction. In the face of these provocative results, new theories of learning should be designed to account for these findings.     

Authenticity at Work: A Matter of Fit?

Authenticity at work refers to the extent to which a worker feels in touch with their true self while at work. At first sight this concept seems to overlap with the concept of person-environment (P-E) fit, that is, the degree to which an individual experiences good fit with their work environment. Drawing on a sample of 867 Dutch gifted workers, structural equation modeling was used to investigate (i) whether authenticity at work and P-E fit can be distinguished, and (ii) how authenticity at work and P-E fit were associated with employee well-being. As expected, confirmatory factor analysis revealed that authenticity at work and P-E fit were distinct from each other. Moreover, the mediated effect of authenticity at work was stronger for two negative forms of well-being (burnout and boredom) than for two positive forms of well-being (work engagement and job satisfaction). The theoretical and practical implications of these findings are discussed, especially focusing on the distinction between authenticity and P-E fit.     

Examining the Clinical Efficacy of Core Transformation: A Randomized Clinical Trial

This randomized clinical trial with a sample of adults (N = 129) from India explored the effects of a single core‐transformation session on symptom experience and psychological growth. The results over the total 8‐week study period indicated significant, moderate overall effect sizes (ds = 0.63 and 0.52) for symptom experience, emotional stability, affect balance, global well‐being, and purpose in life. Implications for research and clinical practice are discussed.     

The Origins of Religious Stratification in Colonial America

Religious stratification occurs when religion is institutionalized in the laws and/or customs of society as a criterion for the allocation of social positions and their attendant rewards. The result is a relatively stable ranking of religious groups in terms of their access to power, privilege, and prestige. In this article, we examine the social processes that contributed to the emergence of religious stratification in colonial America. Following Weber (1946), Lenski (1966), and Noel (1968), we use a "modified fair shares" theory that highlights the importance of three contributing influences: religious prejudice, competition, and differential power. After explaining the role played by each of these factors, we document the existence and enduring nature of religious stratification in the colonies. The evidence includes data on the religious establishments that arose in some colonies, other regulations governing access to scarce resources (such as the right to vote and hold public office), and differential access to economic and political power based on religious adherence. We conclude with observations about the need for further research on religious stratification in America.     

Evaluating the relative effectiveness of three aversion therapies designed to reduce craving among cocaine abusers

Crack cocaine use and dependence has been steadily increasing since the mid‐1980s. Treatment approaches vary from simple psychotherapy to intensive medication regimens. One clear phenomenon that has been implicated in the continued use and abuse of crack cocaine is craving. Craving is believed to be a response that has been conditioned with previous drug using episodes, and is elicited by environmental cues. The current study investigated the use of three aversion therapies (chemical, covert sensitization, and faradic) designed to eliminate craving for cocaine. Seventy subjects were randomly assigned to one of three aversion treatments or a relaxation control condition. Results indicate that aversion therapy reduces crack cocaine craving. The use of aversion therapy as an adjunct to traditional treatment programs for reducing craving is discussed. Copyright © 2004 John Wiley & Sons, Ltd.