Floral guidance of learning a preference for symmetry by bumblebees

This study examines the mechanism underlying one way in which bumblebees are known to develop a preference for symmetric patterns: through prior non-differential reinforcement on simple patterns (black discs and white discs). In three experiments, bees were given a choice among symmetric and asymmetric black-and-white non-rewarding patterns presented at the ends of corridors in a radial maze. Experimental groups had prior rewarded non-discrimination training on white patterns and black patterns, while control groups had no pre-test experience outside the colony. No preference for symmetry was obtained for any of the control groups. Prior training with circular patterns highlighting a horizontal axis of symmetry led to a specific subsequent preference for horizontal over vertical symmetry, while training with a vertical axis abolished this effect. Circles highlighting both axes created a general avoidance of asymmetry in favour of symmetric patterns with vertical, horizontal or both axes of symmetry. Training with plain circles, but not with deformed circles, led to a preference for symmetry: there was no evidence that the preference emerged just by virtue of having attention drawn away from irrelevant pattern differences. Our results point to a preference for symmetry developing gradually through first learning to extract an axis of symmetry from simple patterns and subsequently recognizing that axis in new patterns. They highlight the importance of continued learning through non-differential reinforcement by skilled foragers. Floral guides can function not only to guide pollinators to the source of reward but also to highlight an axis of symmetry for use in subsequent floral encounters.     

Brooding rumination and attentional biases in currently non-depressed individuals: an eye-tracking study

Both rumination and attentional biases have been proposed as key components of the RDoC Negative Valence Systems construct of Loss. Although theorists have proposed that rumination, particularly brooding rumination, should be associated with increased sustained attention to depression-relevant information, it is not clear whether this link would be observed in a non-depressed sample or whether it is specific to brooding versus reflective rumination. To address these questions, the current study examined the link between brooding rumination and attentional biases in a sample of non-depressed individuals (n?=?105). Attentional biases were assessed using eye tracking during a passive viewing task in which participants were presented with 2?×?2 arrays of angry, happy, sad, and neutral faces. In line with predictions, higher levels of brooding rumination were associated with greater sustained attention to sad faces and less sustained attention to happy faces. These results remained significant after controlling for participants’ prior history of major depression and current nonclinical level of depressive symptoms, suggesting that the link between brooding rumination and attentional biases is at least partially independent of current or past depression.     

Stress and depression of facing death: Investigation of psychological symptoms in patients with mesothelioma

Cancer often results in psychological impairment, and lung cancer has been associated with greater morbidity and higher levels of psychological distress than any other form. Chronic exposure to asbestos is a significant risk factor for development of lung cancer, called mesothelioma. Few have studied the psychological consequences of chronic asbestos exposure and mesothelioma. This study investigated stress and depression symptoms in 49 men (M = 51.1 years, SD = 6.0) diagnosed with mesothelioma. Participants completed traumatic stress, depression and general psychological health questionnaires. All participants reported significant levels of traumatic stress symptoms, which was associated with increased symptoms of depression, anxiety, somatic complaints and social dysfunction. The results provide important suggestions for clinicians treating such terminally ill patients.     

Individual differences in online spoken word recognition: Implications for SLI

Thirty years of research has uncovered the broad principles that characterize spoken word processing across listeners. However, there have been few systematic investigations of individual differences. Such an investigation could help refine models of word recognition by indicating which processing parameters are likely to vary, and could also have important implications for work on language impairment. The present study begins to fill this gap by relating individual differences in overall language ability to variation in online word recognition processes. Using the visual world paradigm, we evaluated online spoken word recognition in adolescents who varied in both basic language abilities and non-verbal cognitive abilities. Eye movements to target, cohort and rhyme objects were monitored during spoken word recognition, as an index of lexical activation. Adolescents with poor language skills showed fewer looks to the target and more fixations to the cohort and rhyme competitors. These results were compared to a number of variants of the TRACE model (McClelland & Elman, 1986) that were constructed to test a range of theoretical approaches to language impairment: impairments at sensory and phonological levels; vocabulary size, and generalized slowing. None of the existing approaches were strongly supported, and variation in lexical decay offered the best fit. Thus, basic word recognition processes like lexical decay may offer a new way to characterize processing differences in language impairment.     

Everyday Victimization of Adolescent Girls by Boys: Sexual Harassment, Bullying or Aggression?

School-based sexual harassment of adolescent girls by boys appears commonplace, yet aggression and bullying studies rarely yield sexualized material. This qualitative Australian study with 72 14- to 15-year-olds and 7 teachers aimed to discover whether interviewer use of neutral language in gender-segregated focus groups and interviews would yield material indicating that the victimization of girls by boys is sexualized. Verbal and indirect victimization were reported to be everyday occurrences, and almost entirely sexual. Findings are discussed in the light of definitions of sexual harassment, bullying and aggression. It is concluded that the term “sexual bullying” appropriately captures the gendered power structure underlying these behaviors. As such, they need to be understood, and become visible, more broadly than in terms of individual pathology.     

Gender-Differentiated Associations among Objectified Body Consciousness, Self-Conceptions and Physical Activity

The nature of relationships among objectified body consciousness (OBC), a model of physical self-conceptions, and self-reported physical activity were examined in a cross-sectional study with U.S. undergraduate women (n?=?231) and men (n?=?163). As hypothesized, women reported significantly higher levels of OBC body surveillance and body shame than men with no significant difference in OBC appearance control beliefs levels between women and men. Canonical correlation analysis revealed significant and different relationships between the set of OBC variables and the set of physical self-concept variables for women and men. The strength of association between the two sets of variables accounted for 48% of the shared variance for women and 29% for men. The multivariate relationship between OBC and physical activity was non-significant.     

Moral disengagement in ethical decision making: a study of antecedents and outcomes

This article advances understanding of the antecedents and outcomes of moral disengagement by testing hypotheses with 3 waves of survey data from 307 business and education undergraduate students. The authors theorize that 6 individual differences will either increase or decrease moral disengagement, defined as a set of cognitive mechanisms that deactivate moral self-regulatory processes and thereby help to explain why individuals often make unethical decisions without apparent guilt or self-censure (Bandura, 1986). Results support 4 individual difference hypotheses, specifically, that empathy and moral identity are negatively related to moral disengagement, while trait cynicism and chance locus of control orientation are positively related to moral disengagement. Two additional locus of control orientations are not significantly related to moral disengagement. The authors also hypothesize and find that moral disengagement is positively related to unethical decision making. Finally, the authors hypothesize that moral disengagement plays a mediating role between the individual differences they studied and unethical decisions. Their results offer partial support for these mediating hypotheses. The authors discuss the implications of these findings for future research and for practice.     

Abrupt onsets capture attention independent of top-down control settings

Previous research using a spatial cuing paradigm in which a distractor cue preceded the target has shown that new objects presented with abrupt onsets only capture attention when observers are set to look for them (e.g., Folk, Remington, & Johnston, 1992). In the present study, we used the same spatial cuing paradigm as Folk et al. (1992) to demonstrate that even when observers have an attentional set for a color singleton or a specific color feature, an irrelevant new object presented with an abrupt onset interfered with search. We also show that the identity of the abrupt-onset distractor affects responses to the target, indicating that at some point spatial attention was allocated to the abrupt onset. We conclude that abrupt onsets ornew objects override a top-down set for color. Abrupt onsets or new objects appear to capture attention independently of top-down control settings.