Projective invariance and picture perception

Four experiments test the assumption that, in the visual perception of pictures, observers have reliable and direct access to the equivalence of shapes in projective geometry. The assumption is that perception of projective equivalence is the basis of shape constancy ('the projective thesis'). Observers matched or reproduced abstract planar shapes under conditions of rotation in the picture plane, and pictured rotation in depth. Departure from projective equivalence was assessed in each study by measuring the planar analogue of cross ratio. Projective equivalence was not found to be perceived uniformly where Euclidean equivalence was not judged uniformly, either in recognition tasks or in production tasks. When the projective thesis is put to a suitably general test, confidence in the thesis is undermined.     

Subclinical delusional ideation and a self‐reference bias in everyday reasoning

Previous studies (e.g. Moller & Husby, 2000 ; Blackwood et al., 2004 ) have revealed that delusional thinking is accompanied by an exaggerated focus upon the self and upon stimuli that are perceived to be related to the self. The objective was to examine whether those high in subclinical delusional ideation exhibit a heightened tendency for self‐reference. Using a mixed design, healthy individuals, classified into high‐ and low‐scoring groups on the Peters et al. Delusions Inventory ( Peters, Day, & Garety, 1996 ), were compared on everyday reasoning tasks across three experiments. High‐PDI scorers, in contrast to the low‐PDI group, rated self‐referent objections to everyday arguments as stronger than other‐referent objections and formulated more self‐referent assertion‐based objections to everyday arguments. The findings support the notion that subclinical delusional ideation is linked to a self‐reference bias, which is evident in the sort of everyday thinking that people engage in when forming or evaluating their beliefs and which may contribute to delusion formation.     

The role of perceived control in overcoming defensive self-evaluation

Two experiments investigated how perceived control over one’s abilities and one’s perceived standing on these abilities affect feedback seeking. Two aspects of perceived control were studied: Experiment 1 focused on perceived control over the expression of one’s ability in performance, whereas Experiment 2 focused on perceived changeability of the ability itself. The results of the two experiments showed that to the extent that participants’ perceived ability was low, both aspects of perceived control increased interest in negative feedback—feedback that diagnoses weaknesses—and decreased interest in positive feedback—feedback that diagnoses strengths. Mediation analyses showed that the effects of perceived ability and perceived control on feedback seeking were mediated by the subjective informational value of the feedback as well as its esteem-related affective value. These results were interpreted as evidence for pragmatic feedback seeking—a process that flexibly integrates immediate emotional value and long-term usefulness of self-relevant information.     

Physical Attractiveness,Altruism and Cooperation in an Ultimatum Game

Explaining cooperative tendencies through an evolutionary lens has been problematic for theorists. Traditional explanations derive from theories of reciprocity, biological markets, and more recently via partner choice and sexual selection. The sexual selection hypothesis has been tested within game-theoretic frameworks gaining empirical support in explaining the evolution of altruism. Males have been found to be more altruistic towards attractive females. However, previous research has predominantly adopted a design where participants are not engaging with ‘real people’. Instead, participants make decisions when viewing images or hypothetical scenarios without visual cues. The present study aimed to investigate the sexual selection hypothesis using a face-to-face game theoretic framework. One hundred and thirty-eight participants played a 2-round ultimatum game with chocolate coins as the monetary incentive. We find, that physical attractiveness had no influence on generosity and cooperation when participants play a face-to-face ultimatum game. Instead, proposers were fair when allocating stakes, offering an average of half the endowment to responders. This study refutes the link between the sexual selection hypothesis and generosity when playing economic games with real people. Fairness appeared to drive generosity and cooperation.     

Prevalence and Characteristics of Patients with Suspected Inherited Renal Cell Cancer: Application of the ACMG/NSGC Genetic Referral Guidelines to Patient Cohorts

Patients with suspected hereditary renal cell cancer (RCC) are under-referred for genetic evaluation. Characterizing the prevalence and characteristics of suspected inherited RCC is a crucial step toward advancing personalized, genetically-based cancer risk management for patients and their families. To evaluate the prevalence and characteristics of suspected inherited RCC syndromes based on consensus criteria, we performed a cross-sectional analysis of patients with a diagnosis of RCC in SEER (2001–2011, n = 105,754) and in our institutional cancer registry (2004–2013, n = 998). Consensus criteria for referral of patients with RCC for genetic evaluation from the American College of Medical Genetics and Genomics and National Society of Genetic Counselors (ACMG/NSGC) were applied to the two cohorts. The associations between meeting referral criteria with demographic characteristics were assessed with chi-square tests. Overall, 24.0 % of the SEER cohort and 33.7 % of our institutional cohort met ACMG/NSGC referral criteria for genetic counseling. While white patients more commonly met early onset clear cell RCC criteria, black patients met papillary RCC criteria at twice the rate of whites in both cohorts (p < 0.0001). As many as 1 in 5 individuals with RCC meet referral criteria for genetic evaluation based on newly emerging guidelines, with differences in pathology noted by race. Prospective genetic testing studies utilizing emerging referral guidelines should help to refine the genetic spectrum of inherited kidney cancer. This study supports efforts to increase awareness of referral of patients with RCC for genetic counseling particularly among urologic providers.     

How the Dead Live

This paper maintains (following Yougrau 1987; 2000 and Hinchliff 1996) that the dead and other former existents count as examples of non-existent objects. If the dead number among the things there are, a further question arises: what is it to be dead—how should the state of being dead be characterised? It is argued that this state should be characterised negatively: the dead are not persons, philosophers etc. They lack any of the (intrinsic) qualities they had while they lived. The only facts involving the dead are facts about the relations they stand in—including the relations they bear to the qualities they formerly instantiated, and the intentional relations they stand in to us. Given an appropriate conception of qualities the dead can be said to be quality-less objects: bare particulars. The ‘Bare Particular Theory’ of individuals, it is argued, is coherent if and only if it concedes that the bare particulars it allows for don’t exist. The account of the dead and other former existents as bare particulars does justice to the misfortune of death, and points the way to a general theory of nonexistent objects.     

Learning a spatial skill for surgery: how the contributions of abilities change with practice

We examined changes in performance as people learned to use an angled laparoscope, a challenging spatial skill that must be mastered by surgeons who perform minimally invasive techniques. In Experiment 1, novices took tests of spatial and general reasoning ability, and then learned to operate an angled laparoscope, simulated in a virtual environment, over 12 learning sessions. Initial performance showed considerable variability among learners, with performance related to general and spatial abilities. As learning progressed, interindividual variability diminished and all learners attained proficiency; the correlation with general ability diminished but the correlation with spatial ability remained significant. In Experiment 2, performance by highly experienced surgeons on the simulation was excellent from the first session, confirming its ecological validity. The findings contribute to theories of skill acquisition. They also have practical implications for the selection of surgeons and for the potential use of virtual environments in surgical training. Copyright © 2006 John Wiley & Sons, Ltd.     

Stigma as framed on YouTube: Effects of personal experiences videos on students’ beliefs about medicalizing intersex

People with physical intersex characteristics can be subject to medical interventions that risk human rights to bodily integrity and self‐determination. Proponents and opponents of medicalization use personal narrative videos on YouTube to frame intersex as a stigma best understood through a medical or social identity frame. Ninety‐nine psychology students watched one of two YouTube videos with either a medical or social identity frame, or participated in a comparison group who watched no video. Participants extracted the videos’ medical or social identity framing in their own words. The social identity video increased participants’ sense that medicine was more harmful and less beneficial, and the medical video decreased participants’ sense that medicine was harmful. Although the videos aimed at bringing about social understanding of intersex people, neither video impacted stigmatizing beliefs about intersex people as a group. Rather, effects of the videos on beliefs about harms of medicalization were moderated by two stigma measures; social distance and gender binary beliefs. Medical intervention on intersex has been justified, in part, on grounds that stigma is inevitable. While intersex stigma has rarely been empirically examined, the present study shows that people with less propensity to stigmatize see less benefit from medicalizing intersex traits and are more open to learning few framings from personal experience videos.     

The political psychology of reproductive strategies

We argue that several reproductive strategies that parental investment theory suggests are adaptive for men and for women are in fact most adaptive for individuals able and willing to use power in dominance relationships. We tested whether people's support for social dominance mediates their willingness to use these reproductive strategies. We hypothesized that the strategies of multiple simultaneous mating, resistance to caring for children as one's own, and sexual jealousy will be appealing especially to men who approve of social dominance, and that finding a high-status, high-earning mate will appeal especially to women who approve of social dominance. Support for the hypotheses using multiple samples and multiple measures was found, and theoretical issues are discussed.     

Lower level mediation in multilevel models

Multilevel models are increasingly used to estimate models for hierarchical and repeated measures data. The authors discuss a model in which there is mediation at the lower level and the mediational links vary randomly across upper level units. One repeated measures example is a case in which a person's daily stressors affect his or her coping efforts, which affect his or her mood, and both links vary randomly across persons. Where there is mediation at the lower level and the mediational links vary randomly across upper level units, the formulas for the indirect effect and its standard error must be modified to include the covariance between the random effects. Because no standard method can estimate such a model, the authors developed an ad hoc method that is illustrated with real and simulated data. Limitations of this method and characteristics of an ideal method are discussed.