Effects of naloxone on acquisition and extinction of jump-up avoidance behavior in rats

Two experiments were carried out to assess the effects of the opioid antagonist, naloxone, on the acquisition and extinction of shock avoidance by rats in the jump-up apparatus. In Experiment 1 naloxone pretreatment facilitated acquisition but had no effect on extinction of avoidance behavior. In the second experiment the effect of naloxone on acquisition was replicated and in addition, it was shown that naloxone enhanced freezing when a response prevention or flooding procedure was introduced. Again naloxone failed to alter the course of extinction, nor did it interact with the effects of flooding which, by itself, facilitated extinction. The results suggest that naloxone's effects are limited to increasing the functional intensity of the US, and provide further support for the dissociation between extinction of avoidance behavior and other indices of fear.     

Short-term homogeneous group therapy for schizophrenic inpatients: A questionnaire evaluation

Traditional, insightoriented group therapy with a heterogeneous patient population has not been effective in the short-term inpatient setting. We have experimented with a homogeneous group therapy format where all of the patients have been acutely psychotic schizophrenics. Clinically, this approach has been found to be useful. Questionnaires filled out by the patients at the time of discharge have supported this conclusion. The patients valued the group more as a place to express their feelings and learn ways of interacting with others than as a place to test reality or receive advice on practical issues.     

Outpatient alcoholics view group therapy

Eight chronic alcoholic outpatients who completed six months of a biweekly therapy group returned questionnaires based on Yalom's concepts of group therapy curative factors. The questionnaire data revealed that the most helpful factors were instillation of hope, altruism, group cohesiveness, interpersonal output and universality. These results are discussed with reference to other studies using Yalom's technique.Supported by Biomedical Research Support Grant Number 2-0570260-30102, Langley Porter Psychiatric Institute, San Francisco, California.     

Stroop interference: An input and an output phenomenon

Three theories of Stroop interference are considered: perceptual conflict theory (Hock and Egeth, 1970), response competition theory (Morton, 1969) and conceptual encoding theory (Seymour, 1977). The first two fail to provide a full explanation of the available data, and Seymour's evidence is incomplete. Two experiments are reported. In the first, typical Stroop interference occurs in naming colour patches. In the second, subjects responded to colour patches with learned letter name responses. Both stimulus-related (incongruent colour names) and response-related (incongruent letters) distractors produced interference. These results indicate that any theory which assumes only a single locus for interference is incomplete. Conceptual encoding conflict and a modified form of response competition are suggested as possible dual mechanisms for Stroop interference effects.     

Why manifold substantivalism is probably not a consequence of classical mechanics

This paper develops and defends three related forms of relationism about spacetime against attacks by contemporary substantivalists. It clarifies Newton's globes argument to show that it does not bear on relations that fail to determine geodesic motions, since the inertial effects on which Newton relies are not simply correlated with affine structure, but must be understood in dynamical terms. It develops remarks by Sklar and van Fraassen into relational versions of Newtonian mechanics, and argues that Earman does not show them to trivialize the debate.     

Developing algorithms to enhance the sensitivity of cancellation tests of visuospatial neglect

We describe a set of algorithms that enhance the sensitivity of cancellation tests used in assessing visuospatial neglect. The algorithms can be readily implemented on a computer and can provide temporal and nontemporal data on strategies used during cancellation. We also present preliminary results from a group of 68 right-hemisphere brain-damaged patients and 12 age-matched control participants, which demonstrate the clinical significance of the measures we have defined.     

DOUGHNUTS AND DICKIE

In this paper, I assess Dickie's institutional theory of art. I compare the earlier and later forms of the theory, and I point to various problems of detail with these accounts. I then proceed by arguing that Dickie's definition excludes Krispy Kreme doughnut boxes from possessing the status of being works of art, and it excludes those who made them from possessing the status of being artists. The intention is not to offer a counter example to Dickie's account. Rather, the complaint is that there could be no philosophical point or interest in a concept of art which excludes these doughnut boxes. The best way to see this is by contrast with a concept of art that includes them. Thus I outline what I call a ‘creative’ account. What we want is a concept of art which helps us understand a certain phenomenon in the world – the phenomenon that we call ‘art’. In this light, I argue that Dickie's institutional theory tells us nothing about why people want to make art and nothing about why they want to experience it. By contrast, the creative theory, which embraces both doughnut boxes and things in galleries, is more explanatory.     

Peer group processes and adolescent health-related behaviour: More than ‘peer group pressure’?

This paper argues that ‘peer group pressure’ conveys an individualistic and hence inadequate account of the group processes involved in adolescents' adoption of health-related behaviours such as smoking and drinking. We describe traditional analyses of adolescent peer processes, illustrate how these contain a series of individualistic assumptions about peer interactions/social influence processes, and describe how these structure the analysis of adolescent health-related behaviour and health education interventions. We highlight the inadequacies of these analyses, outline an alternative and draw out its implications for health education.     

Won't you be my neighbor? Local community identification predicted decreased stress over the first year of the COVID-19 pandemic

Social identities are an important resource, especially during times of crisis. They provide shared meaning, as well as access to social and instrumental support. The COVID-19 pandemic, although global in nature, was experienced very locally; many people stopped traveling and were often confined to their homes and neighborhoods. We reasoned this would make American residents' local community identities especially important. We collected data at five time points between April 2020 and March 2021 and measured American adults' social identification with their local community, identification with a self-nominated important group, and stress. We found that stress decreased over the first few months of the pandemic, then leveled out. Importantly, this decrease was more pronounced among people who strongly identified with their local communities. Furthermore, community identities were stronger predictors of stress decreases than social groups that respondents themselves nominated as highly important to them (e.g., family, friends). These results held controlling for age, gender, political conservatism, and other variables. This research provides important insights into the importance of social identities, and specifically local communities, during times of crisis.