Variety‐Seeking and Perceived Expertise

People often infer expertise from the choice of unique, rare, or sophisticated options. But might mere variety‐seeking also serve as a signal of expertise, and if so, how? Six studies show that the relationship between variety‐seeking and perceived expertise is not unidirectional and depends on the perceiver's own level of expertise. Category experts perceive lower variety‐seeking as indicative of discernment, which in turn increases perceived expertise in that category. Consequently, experts choose less variety to portray themselves as experts. In contrast, novices perceive high variety‐seeking as indicative of category breadth knowledge, which in turn increases their perception of category expertise. Consequently, novices choose more variety to portray themselves as experts. The findings make novel theoretical contributions to research on variety‐seeking, consumer expertise, and social perception, as well as practical contributions for marketers of product assortments and bundles.     

Do Occupational Performance and Social Support Predict Health and Well-Being Among Mothers of Preterm Infants?

Journal of Child and Family Studies - Giving birth to a preterm infant has significant implications on the mother’s life. The purpose of this study was to compare occupational performance...     

Dyadic Listening in Teams: Social Relations Model

Listening has powerful organizational consequences. However, studies of listening have typically focused on individual level processes. Alternatively, we hypothesized that perceptions of listening quality are inherently dyadic, positively reciprocated in dyads, and are correlated positively with intimacy, speaking ability, and helping-organizational-citizenship behavior, at the dyadic level. In two studies, teammates rated each other on listening and intimacy; in one, they also rated speaking ability, and helping-organizational-citizenship behavior, totaling 324 and 526 dyadic ratings, respectively. In both studies, social relations modeling suggested that the dyad level explained over 40 percent of the variance in both listening and intimacy, and yielded the predicted positive dyadic reciprocities. Furthermore, as predicted, listening perceptions correlated with intimacy, speaking ability, and helping behavior as reported by other workers, primarily at the dyadic level. Moreover, rating of listening, but not of speaking, by one dyad member, predicted intimacy reported by the other dyad member, and that intimacy, in turn, predicted helping-organizational-citizenship behavior. Counterintuitively, listening quality is more a product of the unique combination of employees than an individual difference construct. We conclude that perceived listening, but not perceived speaking, appears to be the glue that binds teammates to each other dyadically, and consequently affects helping.     

Predictors of anxiety and depression among newly diagnosed people living with HIV: A longitudinal study

This longitudinal study examined whether past resilience and internalized stigma predicted anxiety and depression among newly diagnosed Spanish-speaking people living with HIV (PLWH). We also analyzed whether coping strategies mediated this relationship. Data were collected at two time points from 119 PLWH. Approximately a third of participants had scores indicative of anxiety symptoms, the same result was found for depressive symptoms. Structural equations modeling revealed that 61% of the variance of anxiety and 48% of the variance of depression 8 months after diagnosis was explained by the proposed model, which yielded a good fit to data. Anxiety and depressive symptoms were significantly and negatively predicted by positive thinking, thinking avoidance, and past resilience, and positively predicted by self-blame. Additionally, anxiety was positively predicted by internalized stigma. Past resilience negatively predicted internalized stigma, self-blame, and thinking avoidance and it positively predicted positive thinking. Internalized stigma positively predicted self-blame. Moreover, internalized stigma had a significant indirect effect on anxiety symptoms through self-blame, and past resilience had significant indirect effects on anxiety symptoms and depressive symptoms through internalized stigma and coping. The results point to the need for clinicians and policy makers to conduct systematic assessments and implement interventions to reduce internalized stigma and train people living with HIV to identify and use certain coping behaviors.     

Rear negativity: Verbal messages coming from behind are perceived as more negative

Many studies have explored the evaluative effects of vertical (up/down) or horizontal (left/right) spatial locations. However, little is known about the role of information that comes from the front and back. Basing our investigations on multiple theoretical considerations, we propose that spatial location of sounds is a cue for message valence, such that a message coming from behind is interpreted as more negative than a message presented in front of a listener. Here we show across a variety of manipulations and dependent measures that this effect occurs in the domain of social information. Our data are most compatible with theoretical accounts which propose that social information presented from behind is associated with uncertainty and lack of control, which is amplified in conditions of self-relevance.     

Are three-sample tasks less sensitive than two-sample tasks? Memory effects in the testing of taste discrimination

In order to provide insights into why discrimination protocols with three stimuli sometimes tend to be less sensitive than protocols with two stimuli, two experiments were conducted. In these experiments, the relative effects of memory decay and memory interference were investigated. Both experiments involved purified water and/or solutions of low NaCl concentration. In Experiment 1, three protocols were compared: the traditional same-different test (Protocol 1), the same protocol with a rinse between the two samples (Protocol 2), and Protocol 2 with an added time delay between the first sample and the intermediate rinse (Protocol 3.) The decrease in measured d' values as time delay increased indicated that memory decay might be a factor for tests with three stimuli, such as the triangle method, rendering it less sensitive than tests with two stimuli, such as the same-different method. In Experiment 2, four protocols were compared: the traditional same-different test, the two-rinse same-different test, the triangle test, and what will be called duo same-different test. The experimental design allowed the individual consideration of memory decay and interference effects. From this last experiment, the substantial effect of memory interference was uncovered. Further experimentation will be necessary to estimate the exact relative effects of memory interference and memory decay.     

Dissociating mere exposure and repetition priming as a function of word type

The mere exposure effect is defined as enhanced attitude toward a stimulus that has been repeatedly exposed. Repetition priming is defined as facilitated processing of a previously exposed stimulus. We conducted a direct comparison between the two phenomena to test the assumption that the mere exposure effect represents an example of repetition priming. In two experiments, having studied a set of words or nonwords, participants were given a repetition priming task (perceptual identification) or one of two mere exposure (affective liking or preference judgment) tasks. Repetition priming was obtained for both words and nonwords, but only nonwords produced a mere exposure effect. This demonstrates a key boundary for observing the mere exposure effect, one not readily accommodated by a perceptual representation systems (Tulving & Schacter, 1990) account, which assumes that both phenomena should show some sensitivity to nonwords and words.     

Magnetic stimulation studies of foveal representation

The right and left visual fields each project to the contralateral cerebral hemispheres, but the extent of the functional overlap of the two hemifields along the vertical meridian is still under debate. After presenting the spatial, temporal, and functional specifications of Transcranial Magnetic Stimulation (TMS), we show that TMS is particularly suitable to study the question of foveal representation as it allows one to study the effects of selective disruption of left or right hemisphere functions on the processing of centrally presented stimuli. Future strategies for the use of TMS in further tests of visual word recognition are suggested.     

The biochemical bases of the placebo effect

A great variety of medical conditions are subject to the placebo effect. Although there is mounting evidence to suggest that the placebo effect is related to the expectation of clinical benefit, little is still known about the biochemical bases underlying placebo responses. Positron emission tomography studies have recently shown that the placebo effect in Parkinson’s disease, pain, and depression is related to the activation of the limbic circuitry. The observation that placebo administration induces the release of dopamine in the ventral striatum of patients with Parkinson’s disease suggests a link between the placebo effect and reward mechanisms. In addition to Parkinson’s disease, the placebo-reward model may also apply to other disorders. However, the relative contribution of the different neurotransmitters and neuropeptides that are known to be involved in modulating the activity of the limbic system may be disease-specific. Thus, while the placebo-induced clinical benefit observed in Parkinson’s disease would mostly reflect the release of dopamine in the dorsal striatum, the activation of opioid and serotonin pathways could be particularly implicated in mediating placebo responses encountered in pain and depression, respectively. An earlier version of this paper was presented at an international conference, “Placebo: Its Action and Place in Health Research Today,” held in Warsaw, Poland on 12–13 April, 2003.     

A Defence of Jury Nullification

In both Great Britain and the United States there has been a growing debate about the modern acceptability of jury nullification. Properly understood, juries do not have any constitutional right to ignore the law, but they do have the power to do so nevertheless. Juries that nullify may be motivated by a variety of concerns: too harsh sentences, improper government action, racism, etc. In this article, I shall attempt to defend jury nullification on a number of grounds. First, I discuss the use of general verdicts and reject their replacement in criminal trials by special verdicts. Second, I examine verdicts based upon mistakes and racial prejudice, turning my attention to perverse verdicts and the question of whether or not juries are guilty of legislating when nullifying the law. Finally, I look at the problem of the awarding of excessive damages by juries. My goal will be to provide a sound theoretical defence of the practice of jury nullification.R. Pound, Law in Books and Law in Action, American Law Review 44 (1910),18.The term jury nullification is synonymous with jury equity. The use of jury nullification has been suspected of playing a role in the infamous trials of O. J. Simpson and Rodney King in the last decade. See People v Simpson, No. BA097211 (Cal. Super. Ct. 1995); People v Powell, No. BA035498 (Cal. Super. Ct. 1991).