Bottled memories: On how alcohol affects eyewitness recall

This study investigated how different doses of alcohol affected eyewitness recall. Participants (N = 126) were randomly assigned to three groups with different blood alcohol concentration (BAC), either a control group (mean BAC 0.00%, N = 42), a lower alcohol dose group (mean BAC 0.04%, N = 40), or a higher alcohol dose group (mean BAC 0.06%, N = 44). After consumption, participants witnessed a movie of a mock crime and were interviewed one week later. The main results showed that witnesses with the higher intoxication level recalled fewer details compared to witnesses with the lower intoxication level. The amount of alcohol consumed did not have an impact on the accuracy rate. No sex differences were found. The results are discussed in the light of past research. We conclude that more studies are needed before recommendations can be made to an applied setting.     

Are There Enough Injective Sets?

The axiom of choice ensures precisely that, in ZFC, every set is projective: that is, a projective object in the category of sets. In constructive ZF (CZF) the existence of enough projective sets has been discussed as an additional axiom taken from the interpretation of CZF in Martin-Löf’s intuitionistic type theory. On the other hand, every non-empty set is injective in classical ZF, which argument fails to work in CZF. The aim of this paper is to shed some light on the problem whether there are (enough) injective sets in CZF. We show that no two element set is injective unless the law of excluded middle is admitted for negated formulas, and that the axiom of power set is required for proving that “there are strongly enough injective sets”. The latter notion is abstracted from the singleton embedding into the power set, which ensures enough injectives both in every topos and in IZF. We further show that it is consistent with CZF to assume that the only injective sets are the singletons. In particular, assuming the consistency of CZF one cannot prove in CZF that there are enough injective sets. As a complement we revisit the duality between injective and projective sets from the point of view of intuitionistic type theory.     

Retribution and forgiveness: The healing effects of punishing for just deserts

Although punishment and forgiveness frequently are considered to be opposites, in the present paper we propose that victims who punish their offender are subsequently more likely to forgive. Notably, punishment means that victims get justice (i.e. just deserts), which facilitates forgiveness. Study 1 reveals that participants were more likely to forgive a friend's negligence after being primed with punishment than after being primed with inability to punish. In Study 2, participants were more forgiving towards a criminal offender if the offender was punished by a judge than if the offender escaped punishment, a finding that was mediated by the just deserts motive. Study 3 was in the context of actual recalled ongoing interpersonal relations and revealed that punishment predicted forgiveness indirectly via just deserts, not via victims' vengeful motivations. It is concluded that punishment facilitates forgiveness because of its capacity to restore a sense of justice. Copyright © 2013 John Wiley & Sons, Ltd.     

Personal values and prosocial behaviour in strategic interactions: Distinguishing value‐expressive from value‐ambivalent behaviours

Relying on the framework provided by Schwartz's theory of personal values, we investigated whether values can help explain prosocial behaviour. We first distinguished value‐expressive behaviours from value‐ambivalent behaviours. The former are compatible with primarily one value or with congruent values, the latter with mutually conflicting values. In Study 1, an analysis over all 41 (39 unpublished) samples in which we measured personal values and prosocial behaviour in monetarily incentivized strategic interactions (N = 1289; data collected between 2007 and 2010 in China, Finland, Germany, Israel, and the West Bank) supported our idea that personal values, universalism in particular, predict value‐expressive (prisoner's dilemma cooperation and trust game back‐transfers) but not value‐ambivalent behaviours (trust game transfers and ultimatum game proposals and responses). Study 2 (N = 56) focused on dictator game behaviours, which we expected and found to be strongly value‐expressive. The findings contribute to the ongoing discussion on whether and under which circumstances values shape behaviour. Copyright © 2013 John Wiley & Sons, Ltd.     

Dispositions of the Will

According to Aquinas (1888–1906), the virtue of justice is a habit, that is to say, a stable disposition of the will. Many commentators have found this claim to be puzzling, since it is difficult to see what this might entail, beyond a simple tendency to choose and act in accordance with precepts of justice. However, this objection does not take account of the fact that for Aquinas, the will is the principle of human freedom, and as such, it is expressed through, but not limited to a capacity for particular choices and actions. It therefore needs stable dispositions, towards characteristic aims, in order to function effectively. This paper sets out a case for the cogency of Aquinas’s overall account of the will and its dispositions, by way of an examination of familiar expressions of human freedom which cannot be reduced to a series of individual choices and acts. It then turns to a closer examination of Aquinas’ analysis of the will, arguing that Aquinas’ claims about the orientation of the will towards some overarching and comprehensive good can fruitfully be understood in terms of this expansive conception of human freedom.     

The role of verbal memory in regressions during reading

During reading, participants generally move their eyes rightward on the line. A number of eye movements, called regressions, are made leftward, to words that have already been fixated. In the present study, we investigated the role of verbal memory during regressions. In Experiment 1, participants were asked to read sentences for comprehension. After reading, they were asked to make a regression to a target word presented auditorily. The results revealed that their regressions were guided by memory, as they differed from those of a control group who did not read the sentences. The role of verbal memory during regressions was then investigated by combining the reading task with articulatory suppression (Exps. 2 and 3). The results showed that articulatory suppression affected the size and the accuracy of the initial regression but had a minimal effect on corrective saccades. This suggests that verbal memory plays an important role in determining the location of the initial saccade during regressions.     

Identification of Developmentally Appropriate Screening Items for Disruptive Behavior Problems in Preschoolers

Screening preschool-aged children for disruptive behavior disorders is a key step in early intervention. The study goal was to identify screening items with excellent measurement properties at sub-clinical to clinical levels of disruptive behavior problems within the developmental context of preschool-aged children. Parents/caregivers of preschool-aged children (N?=?900) were recruited from four pediatric primary care settings. Participants (mean age?=?31, SD?=?8) were predominantly female (87 %), either white (55 %) or African-American (42 %), and biological parents (88 %) of the target children. In this cross-sectional survey, participants completed a sociodemographic questionnaire and two parent-report behavioral rating scales: the PSC-17 and the BPI. Item response theory analyses provided item parameter estimates and information functions for 18 externalizing subscale items, revealing their quality of measurement along the continuum of disruptive behaviors in preschool-aged children. Of 18 investigated items, 5 items measured only low levels of disruptive behaviors among preschool-aged children. The remaining 13 items measured sub-clinical to clinical levels of disruptive behavior problems (i.e., >1.5 SD); however, 5 of these items offered less information, suggesting unreliable measurement. The remaining 8 items had high discrimination and difficulty parameters, offering considerable measurement information at sub-clinical to clinical levels of disruptive behavior problems. Behaviors measured by the 8 selected parent-report items were consistent with those identified in recent efforts to distinguish developmentally typical misbehaviors from clinically concerning behaviors among preschool-aged children. These items may have clinical utility in screening young children for disruptive behavior disorders.