Affinity propagation: An exemplar-based tool for clustering in psychological research

Affinity propagation is a message-passing-based clustering procedure that has received widespread attention in domains such as biological science, physics, and computer science. However, its implementation in psychology and related areas of social science is comparatively scant. In this paper, we describe the basic principles of affinity propagation, its relationship to other clustering problems, and the types of data for which it can be used for cluster analysis. More importantly, we identify the strengths and weaknesses of affinity propagation as a clustering tool in general and highlight potential opportunities for its use in psychological research. Numerical examples are provided to illustrate the method.     

Cognition and Emotion,Volume 24, 2010, List of Contents

Effective emotion regulation is important for high-quality social functioning. Recent laboratory-based evidence suggests that mindfulness may enhance emotion regulation in socioemotional contexts; however, little is known about mindful emotion regulation during in vivo social interactions. In a study of romantic couples, we assessed each partner's mindfulness and top-down attentional efficiency (with an Emotional Go/No-Go task) prior to sampling emotions and perceived connection with others during day-to-day social interactions. Analyses revealed that mindfulness-related differences in top-down attentional efficiency on the Emotional Go/No-Go predicted positive emotion during daily social interactions. In turn, positive emotion and two additional indices of social emotion regulation each mediated the relation between actor mindfulness and perceived social connection. In corresponding analyses, neither trait reappraisal nor suppression use predicted the outcomes, and all mindfulness relations held controlling for these strategies. Findings support a framework for investigating mindfulness and higher-quality social functioning, for which mindful emotion regulation may be key.     

Is Exposure to Suicide Beyond Kin Associated with Risk for Suicidal Behavior? A Systematic Review of the Evidence

Suicide bereavement and postvention literature often espouses risk for subsequent suicidal behavior among those previously exposed to a suicide death. Most often risk is discussed in relation to kin; however, many more individuals are exposed to suicide, and the impact of this exposure is important to understand in relation to targeting postvention. This review examined the research literature (1990–2014) to determine the evidence base for risk among those exposed to suicide. The findings demonstrate that risk of suicidal behaviors among those exposed to the suicide is significantly higher than those unexposed. These results are discussed within the context of current research in the field of postvention, and suggestions for future research are suggested.     

The counterintuitive impact of responses and response times on parameter estimates in the drift diffusion model

Given a drift diffusion model with unknown drift and boundary parameters, we analyse the behaviour of maximum likelihood estimates with respect to changes of responses and response times. It is shown analytically that a single fast response time can dominate the estimation in that no matter how many correct answers a test taker provides, the estimate of the drift (ability) parameter decreases to zero. In addition, it is shown that although higher drift rates imply shorter response times, the reverse implication does not hold for the estimates: shorter response times can decrease the drift rate estimate. In the light of these analytical results, we illustrate the actual impact of the findings in a small simulation for a mental rotation test. The method of analysis outlined is applicable to a broader range of models, and we emphasize the need to further check currently used reaction time models within this framework.     

A systematic review of the relationship between religion and attitudes toward transgender and gender-variant people

Background: Prejudice against transgender people is widespread, yet in spite of the prevalence of this negativity relatively little is known about the antecedents and predictors of these attitudes. One factor that is commonly related to prejudice is religion, and this is especially true for prejudice targets that are considered to be “value violating” (as is the case for transgender individuals).

Method: In this paper, we present the findings of our systematic search of the literature on this topic and present the synthesized evidence. Our search strategy was conducted across five databases and yielded 29 studies (across 28 articles).

Results: We found consistent evidence that self-identifying as with either being “religious” or as Christian (and to a lesser extent, being Muslim) was associated with increased transprejudice relative to being nonreligious (and to a lesser extent, being Jewish). Additionally, we found consistent evidence that certain forms of religiosity were also related to transprejudice – specifically religious fundamentalism, church attendance, and interpretations of the bible as literal (transprejudice was unrelated to religious education).

Conclusion: Although this young, but important field of research is growing, more empirical exploration is needed to fully understand that nuances of the religion-transprejudice relationship.     

Poverty and the Peril of Particulars

Moral extremists argue for a demanding duty of poverty relief by leveraging powerful intuitions about our duties to rescue those close at hand. I clear the way for a less demanding duty by arguing that this argumentative strategy commits the extremist to a conception of our duty in the face of global poverty that is deeply at odds with our convictions about how we may discharge that duty. These convictions reveal that global poverty and easy rescue cases give rise to duties of different kinds: whereas duties of rescue are ultimately explicable by appeal to moral claims to assistance, duties of poverty relief are not. The extremist’s most compelling argumentative strategy is therefore not viable—he may not straightforwardly appeal to facts about the demandingness of duties of rescue in arguing for demanding duties of poverty relief.     

Curiosity and the pleasures of learning: Wanting and liking new information

This paper proposes a new theoretical model of curiosity that incorporates the neuroscience of “wanting” and “liking”, which are two systems hypothesised to underlie motivation and affective experience for a broad class of appetites. In developing the new model, the paper discusses empirical and theoretical limitations inherent to drive and optimal arousal theories of curiosity, and evaluates these models in relation to Litman and Jimerson's (2004) recently developed interest-deprivation (I/D) theory of curiosity. A detailed discussion of the I/D model and its relationship to the neuroscience of wanting and liking is provided, and an integrative I/D/wanting-liking model is proposed, with the aim of clarifying the complex nature of curiosity as an emotional-motivational state, and to shed light on the different ways in which acquiring knowledge can be pleasurable.