Development and maintenance of choice in a dynamic environment

Four pigeons were exposed to a concurrent procedure similar to that used by Davison, Baum, and colleagues (e.g., Davison & Baum, 2000, 2006) in which seven components were arranged in a mixed schedule, and each programmed a different left∶right reinforcer ratio (1∶27, 1∶9, 1∶3, 1∶1, 3∶1, 9∶1, 27∶1). Components within each session were presented randomly, lasted for 10 reinforcers each, and were separated by 10-s blackouts. These conditions were in effect for 100 sessions. When data were aggregated over Sessions 16-50, the present results were similar to those reported by Davison, Baum, and colleagues: (a) preference adjusted rapidly (i.e., sensitivity to reinforcement increased) within components; (b) preference for a given alternative increased with successive reinforcers delivered via that alternative (continuations), but was substantially attenuated following a reinforcer on the other alternative (a discontinuation); and (c) food deliveries produced preference pulses (immediate, local, increases in preference for the just-reinforced alternative). The same analyses were conducted across 10-session blocks for Sessions 1-100. In general, the basic structure of choice revealed by analyses of data from Sessions 16-50 was preserved at a smaller level of aggregation (10 sessions), and it developed rapidly (within the first 10 sessions). Some characteristics of choice, however, changed systematically across sessions. For example, effects of successive reinforcers within a component tended to increase across sessions, as did the magnitude and length of the preference pulses. Thus, models of choice under these conditions may need to take into account variations in behavior allocation that are not captured completely when data are aggregated over large numbers of sessions.     

The personality correlates of adults who had imaginary companions in childhood

Two studies showed that adults who reported having an imaginary companion as a child differed from adults who did not on certain personality dimensions. The first yielded a higher mean on the Gough Creative Personality Scale for the group who had imaginary companions. Study 2 showed that such adults scored higher on the Achievement and Absorption subscales of Tellegen's Multidimensional Personality Questionnaire. The results suggest that some differences reported in the developmental literature may be observed in adults.     

Motivation for and commitment to social values: The roles of age and gender

The primary aim of this study was to examine how motives and commitment to social values influence well-being in men and women of different ages. College students and older adults in the community reported on their motivational orientation (intrinsic vs. extrinsic), behavioral commitment to idiographic social values, and their current well-being (satisfaction with life, positive and negative affect). We tested a series of path models with motivational orientation mediating the relationship between commitment to values and well-being. Consistent with self-determination theory, we found that behavioral commitment to intrinsically motivating social values was related to greater life satisfaction and positive affect, whereas being committed to extrinsically motivating values was related to greater negative affect. While age and gender did not moderate these relationships, meaningful age and gender differences emerged across value-based motivations, commitment, and indices of well-being. This work adds to our understanding of how values are a guiding influence for successful navigation of one’s social world.     

Other than obedient: Girls' constructions of doctors and treatment regimes for anorexia nervosa

This paper examines how teenage girls diagnosed with and being treated for anorexia nervosa in hospital construct their anorexia, their identity as patients, medical authority and their doctors. In‐depth interviews were conducted with 25 adolescent girls in two large, metropolitan hospitals in Australia. Using a discourse analytic approach informed by poststructural theory, we elucidate how girls perform as patients, contest the authoritative position of doctors and deploy popular, taken‐for‐granted discourses of femininity to resist treatment regimes and the construction of themselves by others as ‘anorexic’ and ‘sick’. Our analysis indicates that medical discourses in the hospital do not necessarily define or delimit girls' constructions of themselves, of anorexia, treatment or their relationships with doctors. The paper argues that understanding and validating girls' perspectives is essential in building and maintaining a therapeutic alliance in hospitals. We conclude by discussing how insights from poststructural analysis can assist in improving hospital practice. Copyright © 2009 John Wiley & Sons, Ltd.     

Bandpass characteristics of high-frequency sensitivity and visual experience in blindsight

Patient RP suffers a unilateral right homonymous quadrant anopia but demonstrates better than chance discrimination for stimuli presented in the blind field at temporal frequencies between 33 and 47 Hz (all significant at p < .05, binomial). Examination of her reports of visual experience during blind-field discrimination suggests a more complex picture in which experiences particular to correct discrimination are not found at low-mid-gamma frequencies, but are significantly more likely than average (76%, p < .001) at a lower frequency (22 Hz) at which blindsight is not observed. We believe that visual experience may serve to support blindsight if discrimination tasks are generally impaired at frequencies outside of the low-mid-gamma band. If this is so, although generally experienced as non-specific and unstructured light, the visual experience that accompanies discrimination performance must be based upon a neural representation which includes information on the visual features present in the stimulus.     

Scientific Productivity and Idea Acceptance in Nobel Laureates

We investigated how new ideas become accepted for Nobel laureates in science. Archival data were collected for 204 Nobel laureates from 1980 to 2009 in physics, chemistry, and medicine or physiology. Acceptance was evaluated for Nobel laureates by Prize area and three key publications in the Nobel laureates' publishing careers: (a) first publication concerning their Nobel idea (FN), (b) highest cited publication concerning their Nobel idea (HN), and (c) last publication concerning their Nobel idea (LN). Acceptance was defined primarily in terms of academic prestige for the journal articles (journal impact factors, article citation counts, Eigenfactor scores [journal impact and journal citations] and journal‐cited half‐life ratings). We found that acceptance for these publications mostly followed LN < FN < HN for all measures and Prize areas—except for physics on impact factor only, which followed FN < LN < HN, as hypothesized. In sum, recent ideas are least accepted rather than original ideas even for established and eminent Nobel laureates.     

Contextual-Hierarchical Reconstructions of the Strengthened Liar Problem

In this paper we shall introduce two types of contextual-hierarchical (from now on abbreviated by ‘ch’) approaches to the strengthened liar problem. These approaches, which we call the ‘standard’ and the ‘alternative’ ch-reconstructions of the strengthened liar problem, differ in their philosophical view regarding the nature of truth and the relation between the truth predicates T r ⁿ and T r ⁿ⁺¹ of different hierarchy-levels. The basic idea of the standard ch-reconstruction is that the T r ⁿ⁺¹-schema should hold for all sentences of \(\mathcal {L}^{n}\). In contrast, the alternative ch-reconstruction, for which we shall argue in section four, is motivated by the idea that T r ⁿ and T r ⁿ⁺¹ are coherent in the sense that the same sentences of \(\mathcal {L}^{n}\) should be true according to T r ⁿ and T r ⁿ⁺¹. We show that instances of the standard ch-reconstruction can be obtained by iterating Kripke’s strong Kleene jump operator. Furthermore, we will demonstrate how instances of the alternative ch-reconstruction can be obtained by a slight modification of the iterated axiom system KF and of the iterated strong Kleene jump operator.     

A review of Evidence‐Based Evaluation of Measures for Assessing Social and Emotional Well‐Being in Indigenous Australians

Addressing low levels of social and emotional well‐being (SEWB) in Indigenous communities has been a national strategic priority for over 10 years and yet progress in assessing the impact of interventions has been slow. One of the key factors limiting the development of evidence‐based practice has been the lack of well‐validated instruments to assess SEWB and how it changes over time as a result of intervention. This article systematically reviews available measures, classifying them in terms of the evidence base that exists to support their use. It is concluded that there is an ongoing need to develop psychometrically sound, comprehensive, culturally appropriate measures to operationalise Indigenous SEWB at a population health, programme evaluation, and clinical level. It is suggested that seven pathways be followed to achieve this goal, including the need to recognise that the gold standard status for Indigenous measurement tools cannot be ascribed based on evidence‐based assessment criteria alone.     

Religion,Race, and Discrimination: A Field Experiment of How American Churches Welcome Newcomers

This article reports the results of a nationwide audit study testing how Christian churches welcome potential newcomers to their churches as a function of newcomers’ race and ethnicity. We sent email inquiries to 3,120 churches across the United States. The emails were ostensibly from someone moving to the area and looking for a new church to attend. That person's name was randomly varied to convey different racial and ethnic associations. In response to these inquiries, representatives from mainline Protestant churches—who generally embrace liberal, egalitarian attitudes toward race relations—actually demonstrated the most discriminatory behavior. They responded most frequently to emails with white‐sounding names, somewhat less frequently to black‐ or Hispanic‐sounding names, and much less to Asian‐sounding names. They also sent shorter, less welcoming responses to nonwhite names. In contrast, evangelical Protestant and Catholic churches showed little variation across treatment groups in their responses. These findings underscore the role of homophily, organizational homogeneity, and the costs of racial integration in perpetuating the racial segregation of American religious life.