Response duration is sensitive to both immediate and delayed reinforcement

We investigated the duration of lever pressing by rats when the delivery of appetitive reinforcers was contingent upon response duration. In the first experiment, response durations increased when duration requirements were imposed, and they decreased when duration requirements were removed. This effect occurred whether reinforcers were immediate or delayed by 8 s. In order to maintain the integrity of the delay intervals, reinforcer delivery was dependent upon both lever depression and release. In a second experiment, lever depression only and a response duration of at least 4 s were required for reinforcer delivery. Compared to immediate reinforcement conditions, delayed reinforcers increased both variability and the length of the maximum response durations. In a third experiment, immediate reinforcers were delivered contingent upon lever depression and release under a variety of duration requirements. Median lever‐press durations tracked the contingencies rapidly. Across all three experiments, rats emitted numerous response durations that were too short to satisfy the reinforcer requirements, and bimodal distributions similar to those produced by differential reinforcement of low rate schedules were evident for most rats. In many aspects, response duration responds to reinforcement parameters in a fashion similar to rate of discrete responding, but an examination of this continuous dimension of behavior may provide additional information about environment–behavior relationships.     

Negative Intergroup Contact and Radical Right‐Wing Voting: The Moderating Roles of Personal and Collective Self‐Efficacy

This study examines whether negative contact with immigrants promotes voting for radical right‐wing parties, to what extent this relationship can be explained by feelings of outgroup threat, and whether this relationship depends on perceived personal and collective self‐efficacy. Hypotheses were tested among 630 native Dutch respondents, mainly living in multicultural neighborhoods. The results show that negative contact with immigrants is associated with feelings of personal (egocentric) and group (sociotropic) threat, and both these feelings, in turn, are associated with radical right‐wing voting. However, negative intergroup contact is less strongly related to egocentric threat when individuals feel able to personally address negative situations with other people (personal self‐efficacy). Furthermore, the findings suggest that negative intergroup contact is less strongly related to sociotropic threat when individuals believe that people in their neighborhood are able to collectively address some negative situations (collective self‐efficacy).     

Factor Structure,Internal Consistency and Criterion Validity of the Full‐form and Short‐form Versions of the Centrality of Events Scale in Young People

The perceived centrality of a traumatic event has been hypothesized to impact subsequent responses to that event and shown to be positively associated to a number of psychological problems. In order to understand the role of this construct in adjustment to stress and trauma, reliable and valid measures are needed. The objective of this study was to evaluate the factor structure, internal consistency and convergent validity of the full‐form and short‐forms of the Centrality of Event Scale when used with young people. A sample of 262 undergraduate students completed this study. Confirmatory factor analyses, Cronbach alpha coefficients and Pearson correlation coefficients were performed. The findings support a one‐factor structure of the full 20‐item and the short 7‐item versions. We also found that both versions provide reliable and valid scores when used with young people. We recommend the use of the 7‐item version to minimize assessment burden. Copyright © 2017 John Wiley & Sons, Ltd.     

Ramadan’s Radical Reform

This article argues that Tariq Ramadan’s reform agenda is relatively modest in scope and has not had the wide-ranging impact the more liberal intelligentsia may have wished for. The article is written from the perspective of a convinced and practising Christian. I am not seeking to prove myself right and Ramadan, or anyone else, wrong, but to evaluate Ramadan’s reform process. The article is divided into four main sections. The first outlines Ramadan’s argument that Muslims must move beyond slavish imitation towards a carefully thought out, contextually appropriate expression of Islam in the modern context. The second critiques Ramadan’s arguments for a realistic pluralism and his suggestion that Muslims regard wherever they live as dār al-shahāda. The third outlines two areas where Ramadan directly challenges the majority opinion within Islam, asking whether these challenges are appropriate and effective. These areas are his call for a moratorium on the Islamic penal code and his desire for greater female involvement with mosques. The fourth section briefly examines Ramadan’s critics before reinforcing the conclusion that Ramadan’s reform, while radical in the sense of returning to Islam’s roots, does not seek to bring about the changes that some might expect it to do.     

The influence of perceived family support on post surgery recovery

The objective of this work was to investigate the possible relationship between perceived family support, levels of cortisol and post surgery recovery. The study sample comprised 42 patients that were due to undergo open cholecystectomy surgery in a Regional Health Authority Reference Centre of the Autonomous Community of Extremadura in Spain. The FACES-II questionnaire was used for the evaluation of perceived family support and to measure the three fundamental dimensions of perceived family behaviour: cohesion, adaptability and family type. The day before surgery, a sample of saliva was taken from each subject in order to determine the level of cortisol. Results showed a clear relationship between family support and recovery. Patients with higher scores on the Cohesion Scale demonstrated better post surgery recovery (F = 8.8; gl = 40; p = .005). A relationship between levels of cortisol, perceived family support and recovery was also revealed. Patients with lower scores on the Cohesion scale and higher cortisol levels demonstrated poorer post surgery recovery (F = 10.96; gl = 40; p = .006). These results are coherent with other studies that have highlighted the beneficial effects of perceived family support on mental and physical health.     

Return of experimentally induced chocolate craving after extinction in a different context: divergence between craving for and expecting to eat chocolate

Unlike in fear conditioning, little attention has been devoted to extinction and renewal in appetitive conditioning, despite its relevance for extinction-based addiction treatments. We developed a paradigm, using a specific tray as a conditioned stimulus (CS) for eating chocolate (unconditioned stimulus, US), to investigate the effects of context change on acquisition and extinction of conditioned chocolate craving using an ABA renewal design. In Study 1 (n=32), participants successfully acquired chocolate craving, but unlike what is commonly observed in fear conditioning, craving did not extinguish. In Study 2, we separately assessed craving and US expectancy in a between-subjects design (n=64). US-expectancy data showed acquisition, extinction and renewal in the ABA group. The craving data did not follow this pattern, suggesting different mechanisms for craving and US expectancy. Similarities and differences between craving and US expectancy, as well as practical implications, are discussed.     

Do humans prefer altruistic mates? Testing a link between sexual selection and altruism towards non‐relatives

Humans are often seen as unusual in displaying altruistic behaviour towards non‐relatives. Here we outline and test a hypothesis that human altruistic traits evolved as a result of sexual selection. We develop a psychometric scale to measure mate preference towards altruistic traits (the MPAT scale). We then seek evidence of whether mate choice on the basis of altruistic traits is present and find it in one study (N=170 couples). We also predict that a stronger female MPAT, as measured by responses to the MPAT scale, will be expressed – a result found in all three studies (Ns=380, 340, and 398). Both sets of results are consistent with the hypothesized link between human altruism towards non‐relatives and sexual selection.     

Factorial confirmatory models of Ryff's scales in a sample of elderly people

Several recent works have analysed the factorial structure of well-being measures. The aim of our study is to analyse the factorial structure of a widely used well-being scale, Ryff's Scales of Psychological Well-being, but in a specific subpopulation of the Spanish population, the elderly. For this particular subpopulation, the construct of well-being has been employed in most theoretical models that explain quality of life, and its role is therefore pivotal. The sample comprised 169 elderly people (65 years or more), sampled within the Valencian Community. The 54-item version of Ryff's scales was used. An item parcelling process was analytically employed before confirmatory factor analyses, allowing a total of 18 well-being indicators. Confirmatory factor analyses were specified and tested, including all theoretical and empirical solutions found in the literature, either in the general population or in specific populations of different cultural contexts. Goodness-of-fit results were similar to the ones found in the literature. Best solutions were a six-factor model with correlated factors, as defended by the authors, and a five-factor correlated solution, collapsing environmental mastery and self-acceptance into a single factor.     

Offline and online automatic number comparison

This paper focuses on automatic number processing as instantiated in the size congruity effect. It was recently argued that long-term "associations between individual digits and the attributes 'small' and 'large' create the size congruity effect" (Choplin and Logan 2003, abstract, p. 17). Moreover, these authors proposed the additional assumption that the relevant connections are acquired over a lifetime of experience with numbers. We show that at least one of these assumptions is not true: either the size congruity effect derives from an (online) comparison effect between two numbers at the time of stimulus presentation (violating the first assumption) or the relevant connections flexibly change (offline) between trials during the course of one experimental session (violating the second assumption).