Safety in Numbers: A Policy‐Capturing Study of the Alibi Assessment Process

A policy‐capturing analysis of alibi assessments was conducted. University students (N = 65), law enforcement students (N = 21), and police officers (N = 11) were provided with 32 statements from individuals supporting a suspect's alibi (i.e., alibi corroborators) and asked to assess the believability of the alibi, the suspect's guilt, and whether they would arrest the suspect. Each statement was composed of five binary features (i.e., relationship between corroborator and accused, age of corroborator, amount of available corroborators, alibi corroborator's confidence in their account, and memorability of the target event). Results showed that there was much parity in the type of information used to assess alibis across the samples. Specifically, we found that 90% of participants' decision policies included the amount of corroborators. Participants also relied upon, albeit to a lesser extent, the suspect–corroborator relationship and the age of the corroborator when assessing the alibi. The potential implications of these findings for understanding how people assess alibi corroborators are discussed. Copyright © 2016 John Wiley & Sons, Ltd.     

A Further Evaluation of the Triarchic Conceptualization of Psychopathy in College Students

The current study provides additional information about the nomological networks of the personality dimensions associated with the triarchic conceptualization of psychopathy – boldness, meanness, and disinhibition (Patrick et al. 2009). All analyses were based on a sample of college students (N = 633 to 637; 50 % women). We evaluated correlations between measures of the triarchic constructs and measures of the facets and domains of the Five-Factor Model (FFM). We also evaluated associations between triarchic constructs and measures of self-esteem, narcissism, aggression and antisocial behavior and tested whether the triarchic measures increment measures of the FFM for predicting these variables. We replicated and extended previous studies concerning the correlates of boldness, meanness, and disinhibition. We also found evidence that measures of the triarchic dimensions incremented measures of the FFM, especially when considering self-reported antisocial behavior.     

Fetal Risks,Relative Risks,and Relatives' Risks

Several factors related to fetal risk render it more or less acceptable in justifying constraints on the behavior of pregnant women. Risk is an unavoidable part of pregnancy and childbirth, one that women must balance against other vital personal and family interests. Two particular issues relate to the fairness of claims that pregnant women are never entitled to put their fetuses at risk: relative risks and relatives' risks. The former have been used—often spuriously—to advance arguments against activities, such as home birth, that may incur risk; the latter implicate the nature of relationships in determining the acceptability of coercing or precluding activities. Motivated reasoning by clinicians and judges leads to inaccurate risk assessments, and judgments based on false claims to objectivity. Such judgments undermine the moral and legal standing of pregnant women and do not advance the interests of fetuses, pregnant women, families, or states.     

Adult Attachment,Self‐Efficacy,Perspective Taking,and Conflict Resolution

Parents (N= 124) completed surveys assessing their adult attachment style, conflict resolution style, social self‐efficacy, and perspective taking. Findings supported hypothesized relationships between secure attachment and mutual forms of conflict resolution. More equivocal support was obtained for hypothesized pairings of specific nonsecure attachment styles and nonmutual conflict styles. Findings suggested mediating effects for social competencies (social self‐efficacy and perspective taking), which accounted for some of the negative association between attachment avoidance and mutual conflict style. Follow‐up analyses identified mediating effects of social competencies on specific combinations of attachment and conflict styles–thus suggesting avenues for counseling interventions.     

Kicking over the Traces: A Note in Response to Zurif and Piñango (1999)

Zurif and Piñango (1999) claimed that they excluded the four agrammatic patients reported by Druks and Marshall (1991) from their review article because two of the patients were nonnative speakers of Hebrew and because the Hebrew sentences we used in our investigations were ungrammatical. In Druks and Marshall (1991) we have shown that the presence or the absence of a trace in two types of Hebrew passives had no effect on the patients' performance. Two patients, without comprehension deficits, performed equally well on both types of passives and two patients, with comprehension deficits, were equally impaired on both types. We remind Zurif and Piñango of our previous response to the claims of ungrammaticality of our materials (Druks & Marshall, 1992) and argue that there were no justifiable reasons for excluding these cases from the review. We also comment on Zurif and Piñango's (1999) and Grodzinsky's (2000) new proposal that the association of agrammatic comprehension should be with Broca's aphasia and not with agrammatism.     

Does your mindfulness benefit others? A systematic review and meta‐analysis of the link between mindfulness and prosocial behaviour

Mindfulness‐based meditation practices have received substantial scientific attention in recent years. Mindfulness has been shown to bring many psychological benefits to the individual, but much less is known about whether these benefits extend to others. This meta‐analysis reviewed the link between mindfulness – as both a personality variable and an intervention – and prosocial behaviour. A literature search produced 31 eligible studies (N = 17,241) and 73 effect sizes. Meta‐analyses were conducted using mixed‐effects structural equation models to examine pooled effects and potential moderators of these effects. We found a positive pooled effect between mindfulness and prosocial behaviour for both correlational (d = .73 CI 95% [0.51 to 0.96]) and intervention studies (d = .51 CI 95% [0.37 to 0.66]). For the latter, medium‐sized effects were obtained across varying meditation types and intensities, and across gender and age categories. Preliminary evidence is presented regarding potential mediators of these effects. Although we found that mindfulness is positively related to prosociality, further research is needed to examine the mediators of this link and the contexts in which it is most pronounced.     

Bayesian inference with Stan: A tutorial on adding custom distributions

When evaluating cognitive models based on fits to observed data (or, really, any model that has free parameters), parameter estimation is critically important. Traditional techniques like hill climbing by minimizing or maximizing a fit statistic often result in point estimates. Bayesian approaches instead estimate parameters as posterior probability distributions, and thus naturally account for the uncertainty associated with parameter estimation; Bayesian approaches also offer powerful and principled methods for model comparison. Although software applications such as WinBUGS (Lunn, Thomas, Best, & Spiegelhalter, Statistics and Computing, 10, 325–337, 2000) and JAGS (Plummer, 2003) provide “turnkey”-style packages for Bayesian inference, they can be inefficient when dealing with models whose parameters are correlated, which is often the case for cognitive models, and they can impose significant technical barriers to adding custom distributions, which is often necessary when implementing cognitive models within a Bayesian framework. A recently developed software package called Stan (Stan Development Team, 2015) can solve both problems, as well as provide a turnkey solution to Bayesian inference. We present a tutorial on how to use Stan and how to add custom distributions to it, with an example using the linear ballistic accumulator model (Brown & Heathcote, Cognitive Psychology, 57, 153–178. doi: 10.1016/j.cogpsych.2007.12.002, 2008).     

Agent causation as a solution to the problem of action

My primary aim is to defend a nonreductive solution to the problem of action. I argue that when you are performing an overt bodily action, you are playing an irreducible causal role in bringing about, sustaining, and controlling the movements of your body, a causal role best understood as an instance of agent causation. Thus, the solution that I defend employs a notion of agent causation, though emphatically not in defence of an account of free will, as most theories of agent causation are. Rather, I argue that the notion of agent causation introduced here best explains how it is that you are making your body move during an action, thereby providing a satisfactory solution to the problem of action.