The absence of depth constancy in contour stereograms

Stereoscopic surfaces constructed from Kanizsa-type illusory contours or explicit luminance contours were tested for three-dimensional (3-D) shape constancy. The curvature of the contours and the apparent viewing distance between the surface and the observer were manipulated. Observers judged which of two surfaces appeared more curved. Experiment 1 allowed eye movements and revealed a bias in 3-D shape judgment with changes in apparent viewing distance, such that surfaces presented far from the observer appeared less curved than surfaces presented close to the observer. The lack of depth constancy was approximately the same for illusory-contour surfaces and for explicit-contour surfaces. Experiment 2 showed that depth constancy for explicit-contour surfaces improved slightly when fixation was required and eye movements were restricted. These experiments suggest that curvature in depth is misperceived, and that illusory-contour surfaces are particularly sensitive to this distortion.     

Set-Theoretic Absoluteness and the Revision Theory of Truth

We describe the solution of the Limit Rule Problem of Revision Theory and discuss the philosophical consequences of the fact that the truth set of Revision Theory is a complete 1/2 set.     

Risk as feelings

Virtually all current theories of choice under risk or uncertainty are cognitive and consequentialist. They assume that people assess the desirability and likelihood of possible outcomes of choice alternatives and integrate this information through some type of expectation-based calculus to arrive at a decision. The authors propose an alternative theoretical perspective, the risk-as-feelings hypothesis, that highlights the role of affect experienced at the moment of decision making. Drawing on research from clinical, physiological, and other subfields of psychology, they show that emotional reactions to risky situations often diverge from cognitive assessments of those risks. When such divergence occurs, emotional reactions often drive behavior. The risk-as-feelings hypothesis is shown to explain a wide range of phenomena that have resisted interpretation in cognitive-consequentialist terms.     

The Spiritual Well-Being of Elderly People: A Study of a French Sample

The aim of our research was to identify predictors of the spiritual well-being of elderly people. More specifically, we postulated that subjective well-being and its components would be predictors of spiritual well-being, and more so than age and health status. We invited 133 people aged 60–95 to complete a questionnaire that included the French adaptation (Velasco and Rioux in Revue Canadienne des Sciences du Comportement 41(2):102–128, 2009) of Paloutzian and Ellison’s (Loneliness: A sourcebook of current theory, research and therapy, Wiley-Interscience, New York, 1982) Spiritual Well-Being Scale, Ryff and Essex’s (Psychol Aging 7:507–517, 1992) Psychological Well-Being Scale (translated by Lapierre and Desrochers 1997), Salamon and Conte’s (Meas Eval Guid 15(3):194–200, 1982) Life Satisfaction in the Elderly Scale (validated by Rousseau and Dubé in 1993), and the French version (Blais et al. in Can J Behav Sci 21:210–223, 1989) of Diener et al. (J Pers Assess 49:71–75, 1985) Satisfaction with Life Scale. The results only partially confirm our hypothesis, because only satisfaction with life as a whole and two items in “Life Satisfaction in the Elderly Scale” make it possible to predict the spiritual well-being of elderly people. Moreover, neither health status nor age was found to be a significant predictor of spiritual well-being. This research helps understand better the links between the concept of spiritual well-being and that of subjective well-being of elderly people and could contribute to the development of a tool that could take into account the spiritual well-being of elderly people, whether they be believers, agnostic, or atheist.     

The Centrality of Schools in the Lifecourse: The Case for Focusing on School-Related Influences in Developmental Theory and Research

While the strength of the lifecourse/developmental (LCD) perspective in the examination of antisocial behavior has been clearly demonstrated, this work has given little attention to schools and education as salient influences. By contrast, there is much research using other theoretical frameworks to examine school-related risk factors of deviance. Given what we know about the importance of schooling and education on individual development and subsequent implications for behavior, we contend that academic influences should be more prevalent in LCD theories of deviance and that research using an LCD theoretical perspective should embrace non-LCD work examining school-related risk factors of antisocial behavior.     

The Effect of Anxiety on the Conditioning Rate and Stability of the PGR

Two separate experiments were completed to test the effect of valence on performance of kindergarten Ss on a conservation task. Forty-eight Ss in Experiment I, with a mean age of 5.5 years, were asked to conserve a volume of liquid. A significant number of Ss failed to conserve the volume (p < .001), but when valence—desirability of the liquid to drink—was added, a significant number of Ss changed their choices (p < .02) to show conservation. Thirty-eight Ss in Experiment II, with a mean age of 5.5 years, were asked to conserve volume of liquid with valence attached to the first choice. A significant (p < .01) number of Ss showed conservation of volume. The results of the two experiments were compared and discussed in relation to valence and language development as relevant variables in conservation tasks.     

Systematic Review of the Clinical Presentation of Schizophrenia in Intellectual Disability

Schizophrenia and intellectual disability (ID) co-occur three times more than would be expected by chance. This has led to speculation that a particular form of schizophrenia may give rise to both the symptoms of schizophrenia and the intellectual impairment. If this was the case, one may expect the presentation of schizophrenia in an ID population to differ from that in a population with average/high IQ. A systematic review and meta-analysis was undertaken of studies comparing the clinical presentation of schizophrenia in people with mild/borderline ID to that in people with average/high IQ. Five studies were eligible for inclusion. Four reported more negative symptoms in the ID population, while two reported more positive symptoms. Meta-analysis demonstrated that the ID population experienced more negative symptoms. The available evidence supports the proposal that the clinical presentation of schizophrenia in an ID population differs from that in a population with normal IQ.     

Frequent Social Comparisons and Destructive Emotions and Behaviors: The Dark Side of Social Comparisons

Social comparisons may seem to serve several positive functions, including self-enhancement. Frequent social comparisons, however, have a dark side. Two studies examined the relationship between frequent social comparisons and destructive emotions and behaviors. In Study 1, people who said they made frequent social comparisons were more likely to experience envy, guilt, regret, and defensiveness, and to lie, blame others, and to have unmet cravings. In Study 2, police officers who said they made frequent social comparisons were more likely to show ingroup bias and to be less satisfied with their jobs. The dark side of frequent social comparisons was not associated with self-esteem. Results are discussed in terms of the role of individual differences in social comparison processes.