Con-fusing contours & pieces of glass

We present a new illusory display in which illusory contours are misaligned with physical contours. In these displays, illusory Kanizsa squares, induced by the so-called pacmen, are positioned on top of a background grid of bars. The misalignment of the illusory contours with respect to physical contours of the grid of bars induces an overall 'restless' appearance and evokes the impression that parts of the grid within the illusory square are shifted. To test this impression, we created stimuli in which illusory squares were superimposed on a grid at different positions, where the grid could consist of either straight bars or indented bars. After briefly flashing these stimuli, observers reported indentations of the background grid for those cases in which physical and illusory contours were misaligned. In a control condition, the pacmen were replaced by crosses (not inducing an illusory square) at the same positions; as expected much less illusory shifts were reported in this condition. In a second experiment, we further tested the direction of the perceived shifts, revealing similar trends as in the first experiment and a consistent result with respect to the reported direction of the shifts. We explore and discuss possible underlying mechanisms with regard to our illusory display.     

Introduction to Michotte's heritage in perception and cognition research

Several decades after Michotte's work was published, it continues to inspire current research in perception, cognition, and beyond. In this special issue we pay tribute to this heritage with a collection of empirical and theoretical papers on amodal completion and the perception of causality, two areas of research within which Michotte's work and ideas have had a lasting influence. As a background to better understand the remaining papers, we briefly sketch Michotte's life and work and the scope (in breadth and in depth) of his impact. We then review Michotte's seminal contributions to the areas covered in this special issue, some of the major research discoveries and themes in the intervening decades, and the major open questions and challenges we are still facing. We also include a sneak preview of the papers in this special issue, noting how they relate to Michotte's work and to each other. This review shows both how much influence Michotte has had on contemporary perception and cognition research, and how much important work remains to be done. We hope that the papers in this special issue will serve both to celebrate Michotte's heritage in this respect, and to inspire other investigators to continue the projects he began.     

The social face of emotion recognition: Evaluations versus stereotypes

The goal of the present paper was to demonstrate the influence of general evaluations and stereotype associations on emotion recognition. Earlier research has shown that evaluative connotations between social category members and emotional expression predict whether recognition of positive or negative emotional expressions will be facilitated (e.g. Hugenberg, 2005). In the current paper we tested the hypothesis that stereotype associations influence emotion recognition processes, especially when the difference between valences of emotional expressions does not come into play. In line with this notion, when participants in the present two studies were asked to classify positive versus negative emotional expressions (i.e. happy versus anger, or happy versus sadness), valence congruency effects were found. Importantly, however, in a comparative context without differences in valence in which participants were asked to classify two distinct negative emotions (i.e. anger versus sadness) we found that recognition facilitation occurred for stereotypically associated discrete emotional expressions. With this, the current results indicate that a distinction between general evaluative and cognitive routes can be made in emotion recognition processes.     

Partner Enabling of Substance Use Disorders: Critical Review and Future Directions

Substance use disorders affect not only the identified client but significant others as well. Dyadic and family dysfunction is typically associated with a family member's alcohol or drug abuse. One area of research interest based on clinical conceptions of these families is that of partner support or coping in response to the addiction. Female partners of male alcoholics have received much of this clinical and research attention, and have alternatively been labeled as codependents, co-alcoholics, or enablers. Broadening the therapeutic emphasis beyond the impaired individual underscores the systemic notion that a loved one's addiction necessarily affects spouses and partners, and that partner responses may in turn affect drinking or drug behaviors. The present article contrasts the enabling and codependency constructs, reviews empirical studies of enabling, and offers a conceptualization of partner responses to addiction that could enhance future research efforts and clinical applications in this area.     

Lateralisation of diffuse positive and negative affect: Ascribing valence to ambiguous stimuli

The available evidence regarding the lateralisation of affect is rather divergent. Interestingly, the common procedure in previous research on affective lateralisation has been to measure hemispheric dominance following exposure to concrete affective stimuli. Therefore, prior research seems to tap primarily into the lateralisation of specific approach–avoidance motivations rather than diffuse affective states. The present research adopted an alternative methodological approach that excluded approach–avoidance motivations and merely studied the lateralised nature of diffuse affect. Participants evaluated ambiguous stimuli presented in either the right or left visual field. Results showed that stimuli presented in the left visual field were significantly more often ascribed a positive meaning compared to information in the right visual field. The present findings are compatible with related lateralised processes and underscore the necessity of distinguishing between specific motivations and diffuse affect.     

Devaluation of distracting stimuli

Previous research has shown that distracting stimuli are evaluated more negatively than new stimuli in a dual task paradigm (Raymond, Fenske, & Tavassoli, 2003). The present research aimed to extend this research by showing that repeatedly selecting targets in a perceptual identification task leads to lower evaluations of distracting stimuli embedded in this task, even when participants are unaware that they will be asked to evaluate the stimuli in a subsequent (separate) task. Results indeed show that repeatedly selecting target stimuli in the presence of distracting stimuli leads to devaluation of these distracting stimuli compared to both target stimuli and new stimuli in a subsequent task. The findings of the present research indicate that devaluation of repeatedly ignored stimuli arises even when stimulus evaluation is not salient during target selection.     

Sport,Girls, Trouble and Humour: Black and Indian Boys Negotiating Gender,Race and Class in a Formerly White Single Sex School in South Africa

This article reports on an interview study conducted by Deevia Bhana and Rob Pattman of Grade 11 (16–17 year old) boys attending different kinds of public schools in the Durban, South Africa. It investigated their accounts personal lives and identities as young men and women in and outside their schools. We conducted semi-structured interviews with the participants to determine how they experienced school and how they presented themselves in the interviews, their interests, aspirations, relations with other boys and girls in and out of school, and the kinds of identifications they made. The data for this are from two interviews conducted with black and Indian boys at Elmsdale, a formerly white boys' high school near Durban with an excellent academic and sporting reputation. We analyzed the data using narrative and discourse analysis. Concerns about being marginalised in school were expressed by both the black and the Indian boys. Issues of gender, race, class, sexuality and power were prominent in the interviews, notably when the boys were discussing sport, trouble, being funny and girls.     

Gender,Interdependent Self-construals,and Collective Self-esteem: Women and Men Are Mostly the Same

Women and men may differ in how they define themselves in reference to their social world. Baumeister and Sommer () suggest that women prefer close relationships whereas men prefer large-group memberships. We examined how this hypothesized gender difference relates to collective self-esteem from three interdependent groups: friends, family, and gender. Study 1 revealed that women and men report equivalent levels of collective self-esteem from both relational and collective groups. Study 2 replicated this finding, and further revealed that the importance of group membership to individuals is more crucial to understanding collective self-esteem than is a gender differences approach. We discuss the implications of these results in terms of contingencies of social self-worth and potential cognitive processes involved in self-construal.     

Acceptance of Genetic Counseling and Testing in a Hospital-Based Series of Patients with Gynecological Cancer

Referral of patients with endometrial (EC) and/or ovarian cancer (OC) for genetic counseling is based on age at diagnosis and family history. Many patients with hereditary cancers are missed by following this strategy. We determined acceptance and mutation detection rate of offering genetic counseling and testing to unselected EC and OC patients. Therefore, in 2007, EC and OC patients were invited for genetic counseling and testing. Patients were asked for their reasons to accept or decline. Nineteen out of fifty-two EC patients (36 %) and twenty-two out of thirty-five OC patients (63 %) accepted genetic counseling, mainly to receive risk assessment for themselves and relatives. Counseling was declined mainly because patients did not want more tests or had no relatives for whom it was relevant. Eighteen out of nineteen EC patients (95 %) and twenty out of twenty-two OC patients (91 %) underwent genetic testing. One EC patient carried an MSH6 mutation (mutation detection rate: 6 %). BRCA1/2 mutations were found in two out of twenty OC patients (10 %). Eleven patients (29 %) received surveillance recommendations for themselves and their relatives. Finally, family history recorded by the gynecologist was compared to that taken by the clinical geneticist. Gynecologists reported family history in ten out of forty-one participants (24 %). In conclusion, genetic counseling and testing are acceptable to patients with OC and/or EC. The 10 % BRCA1/2 mutation detection rate and underreporting of family history by gynecologists warrant referral for genetic counseling for all OC patients, followed by BRCA1/2 testing if indicated. We recommend that microsatellite instability and immunohistochemical analysis be performed in all EC patients, followed by genetic counseling if appropriate. These strategies will lead to better cancer prevention in gynecological cancer patients and their relatives.     

The potentiation of grasp types during visual object categorization

The close integration between visual and motor processes suggests that some visuomotor transformations may proceed automatically and to an extent that permits observable effects on subsequent actions. A series of experiments investigated the effects of visual objects on motor responses during a categorisation task. In Experiment 1 participants responded according to an object's natural or manufactured category. The responses consisted in uni-manual precision or power grasps that could be compatible or incompatible with the viewed object. The data indicate that object grasp compatibility significantly affected participant response times and that this did not depend upon the object being viewed within the reaching space. The time course of this effect was investigated in Experiments 2–4b by using a go-nogo paradigm with responses cued by tones and go-nogo trials cued by object category. The compatibility effect was not present under advance response cueing and rapidly diminished following object extinction. A final experiment established that the compatibility effect did not depend on a within-hand response choice, but was at least as great with bi-manual responses where a full power grasp could be used. Distributional analyses suggest that the effect is not subject to rapid decay but increases linearly with RT whilst the object remains visible. The data are consistent with the view that components of the actions an object affords are integral to its representation.