Features enhance the encoding of geometry

Successful navigation within an environment requires that the traveler establish the correct heading—a process referred to as orienting. Many studies have now shown that humans and non-human animals can use the geometric properties of an enclosure to orient. In the present study, two groups of Clark’s nutcrackers (Nucifraga columbiana) were trained, in a reference memory task, to find food hidden in one of four containers arranged to form a rectangular array. One group had unique objects placed next to each of the containers, whereas the second group had identical objects placed next to each of the containers. Here, I show for the first time that for the Clark’s nutcracker, the distinctive properties of these objects enhanced the encoding of the array’s geometry compared to the learning of geometric properties from an array of identical objects, which remained at chance after substantial amounts of training. Subsequent transformation tests showed that an object not associated with reward, but sharing the same geometric properties as the correct object, may have had inhibitory qualities. Furthermore, by systematically removing objects from the array, I show that although nutcrackers encoded the geometry of the array, they did not encode a complete featural representation of the objects within the array.     

Peer-facilitated cognitive dissonance versus healthy weight eating disorders prevention: A randomized comparison

Research supports the efficacy of both cognitive dissonance (CD) and healthy weight (HW) eating disorders prevention, and indicates that CD can be delivered by peer-facilitators, which facilitates dissemination. This study investigated if peer-facilitators can deliver HW when it is modified for their use and extended follow-up of peer-facilitated CD as compared to previous trials. Based on pilot data, we modified HW (MHW) to facilitate peer delivery, elaborate benefits of the healthy-ideal, and place greater emphasis on consuming nutrient dense foods. Female sorority members (N = 106) were randomized to either two 2-h sessions of CD or MHW. Participants completed assessment pre- and post-intervention, and at 8-week, 8-month, and 14-month follow-up. Consistent with hypotheses, CD decreased negative affect, thin-ideal internalization, and bulimic pathology to a greater degree post-intervention. Both CD and MHW reduced negative affect, internalization, body dissatisfaction, dietary restraint, and bulimic pathology at 14 months.     

Learning about environmental geometry: a flaw in Miller and Shettleworth's (2007) operant model

Many studies have examined how humans and other animals reestablish a sense of direction following disorientation in enclosed environments. Results showing that geometric shape of an enclosure is typically encoded, sometimes to the exclusion of featural cues, have led to suggestions that geometry might be encoded in a dedicated geometric module. Recently, Miller and Shettleworth (2007) proposed that the reorientation task be viewed as an operant task and they presented an associative operant model that appears to account for many empirical findings from reorientation studies. In this paper we show that, although Miller and Shettleworth's insights into the operant nature of the reorientation task may be sound, their mathematical model has a serious flaw. We present simulations to illustrate the implications of the flaw. We also propose that the output of a simple neural network, the perceptron, can be used to conduct operant learning within the reorientation task and can solve the problem in Miller and Shettleworth's model.     

Husserl, Deleuzean Bergsonism and the Sense of the Past in General

Those familiar with contemporary continental philosophy know well the defenses Husserlians have offered of Husserl’s theory of inner time-consciousness against post-modernism’s deconstructive criticisms. As post-modernism gives way to Deleuzean post-structuralism, Deleuze’s Le bergsonisme has grown into the movement of Bergsonism. This movement, designed to present an alternative to phenomenology, challenges Husserlian phenomenology by criticizing the most “important… of all phenomenological problems.” Arguing that Husserl’s theory of time-consciousness detailed a linear succession of iterable instants in which the now internal to consciousness receives prejudicial favor, Bergsonism concludes that Husserl derived the past from the present and cannot account for the sense of the past, which differs in kind from the present. Consequently, everything on Husserl’s account remains present and his theory cannot accommodate for time’s passage. In this paper, I renew the Husserlian defense of Husserl’s theory of time-consciousness in response to the recent movement of Deleuzean Bergsonism. Section one presents Bergsonism’s notion of the past in general and its critique of Husserl’s theory of time-consciousness. Section two presents a rejoinder to Bergsonism’s critique of Husserl, questioning (1) its understanding of the living-present as linearly extended, (2) its conflation of the living-present with Husserl’s early schema-apprehension interpretation, and (3) its failure to grasp Husserl’s revised understanding of primary memory as a result of (2). In conclusion, I suggest that Husserl’s theory of retention might articulate a notion of the past more consistent with Bergson than Bergsonism itself.

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Physician and patient communication training in primary care: effects on participation and satisfaction

OBJECTIVE: To assess the effects of a communication skills training program for physicians and patients. DESIGN: A randomized experiment to improve physician communication skills was assessed 1 and 6 months after a training intervention; patient training to be active participants was assessed after 1 month. Across three primary medical care settings, 156 physicians treating 2,196 patients were randomly assigned to control group or one of three conditions (physician, patient, or both trained). MAIN OUTCOME MEASURES: Patient satisfaction and perceptions of choice, decision-making, information, and lifestyle counseling; physicians' satisfaction and stress; and global ratings of the communication process. RESULTS: The following significant (p < .05) effects emerged: physician training improved patients' satisfaction with information and overall care; increased willingness to recommend the physician; increased physicians' counseling (as reported by patients) about weight loss, exercise, and quitting smoking and alcohol; increased physician satisfaction with physical exam detail; increased independent ratings of physicians' sensitive, connected communication with their patients, and decreased physician satisfaction with interpersonal aspects of professional life. Patient training improved physicians' satisfaction with data collection; if only physician or patient was trained, physician stress increased and physician satisfaction decreased. CONCLUSION: Implications for improving physician-patient relationship outcomes through communication skills training are discussed.     

Psychophysics of perceiving eye-gaze and head direction with peripheral vision: implications for the dynamics of eye-gaze behavior

Two psychophysical experiments are reported, one dealing with the visual perception of the head orientation of another person (the 'looker') and the other dealing with the perception of the looker's direction of eye gaze. The participant viewed the looker with different retinal eccentricities, ranging from foveal to far-peripheral viewing. On average, judgments of head orientation were reliable even out to the extremes of peripheral vision (90 degrees eccentricity), with better performance at the extremes when the participant was able to view the looker changing head orientation from one trial to the next. In sharp contrast, judgments of eye-gaze direction were reliable only out to 4 degrees eccentricity, signifying that the eye-gaze social signal is available to people only when they fixate near the looker's eyes. While not unexpected, this vast difference in availability of information about head direction and eye direction, both of which can serve as indicators of the looker's focus of attention, is important for understanding the dynamics of eye-gaze behavior.     

Stereotype Threat in Applied Settings Re-Examined

Stricker & Ward (2004 ) examined stereotype threat with a national sample of students taking an Advanced Placement (AP) Calculus exam, and a smaller sample taking Computerized Placement Tests (CPT). They inquired about gender either before (traditional) or after the test (which can reduce stereotype threat). They reported no significant effects of question timing. We reanalyze their findings, and argue that their conservative criterion for evidence led them to overlook significant stereotype threat effects with real practical implications. Women benefited substantially on the Calculus test, and on the CPT–Reading when demographics were asked after testing rather than before. This simple, small, and inexpensive change could increase U.S. women receiving AP Calculus AB credit by more than 4,700 every year.     

Collaborative everyday problem solving among same-gender friends in early and later adulthood

To investigate potential age-related differences in performance gains (compensation and optimization) and losses (failure to actualize potential) of collaboration with a familiar partner, the authors compared pairs of older (N = 75; 69% women) and younger (N = 75; 52% women) age-homogeneous same-gender friends who interacted or worked alone to generate strategies for solving interpersonal and instrumental problems. Two indexes of strategy fluency (total and unique number of strategies) and 2 indexes of strategy type (content of strategy repertoires and strategy selected as most effective by older and younger adults) were examined. Strategies generated by interacting pairs were compared with nominal pair scores. Nominal pair scores indexed dyadic potential and were created by pooling the performance of 2 individuals who worked alone. Age differences in strategy fluency and type were largely similar to prior research based on individual problem solvers. Interacting pairs produced fewer strategies than nominal pairs, but there were no differences in strategy type. For interpersonal problems, older adults were relatively more likely to actualize their dyadic potential.     

Relationships Among Religiousness,Spirituality, and Health for Individuals with Stroke

The current study evaluated the relationships among spiritual beliefs, religious practices, physical health, and mental health for individuals with stroke. A cross-sectional analysis of 63 individuals evaluated in outpatient settings, including 32 individuals with stroke and 31 healthy controls was conducted through administration of the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS) and the Medical Outcomes Scale-Short Form 36 (SF-36). For individuals with stroke, the SF-36 General Mental Health scale was significantly correlated with only the BMMRS Religious and Spiritual Coping scale (r = .43; p < .05). No other BMMRS factors were significantly correlated with SF-36 mental or physical health scales. Non-significant trends indicated spiritual factors were primarily related to mental versus physical health. This study suggests spiritual belief that a higher power will assist in coping with illness/disability is associated with better mental health following stroke, but neither religious nor spiritual factors are associated with physical health outcomes. The results are consistent with research that suggests that spiritual beliefs may protect individuals with stroke from experiencing emotional distress.     

Computerised cognitive‐behaviour therapy (cCBT) and older people: A pilot study to determine factors that influence willingness to engage with cCBT

Objective: The aim of this study was to explore whether older people with depression and/or anxiety were potentially willing to engage with computerised cognitive‐behaviour therapy (cCBT). Method: A short questionnaire was sent to 60 service users aged 65+ who were identified as having anxiety and/or depression. Results: There was a 63.3% response rate for the questionnaire. Almost half of the respondents said they would be interested in using cCBT, and would be willing to learn the necessary computer skills. Conclusions: This pilot study suggests that older people with anxiety and/or depression may be willing to engage with cCBT. However, a number of important factors are highlighted that would need to be considered in deciding whether to develop access to cCBT for older people.