Determining spatial span: The role of movement time and articulation rate

In studies of verbal memory span individual differences in speech rate have been found to predict the number of items that can be recalled in order. This is thought to happen because overt speech rate is related to the rate of internal verbal rehearsal. For spatial span there may also be an internal rehearsal system linked to overt responding, and if there is a strong analogy to be drawn between the verbal and spatial domains, then movement time between spatial targets should predict the number of spatial locations that can be recalled. In the first study reported, none of the six measures of movement time did predict spatial span, but, as expected, speech rate predicted verbal span. In addition, speech rate predicted spatial span. In a second study the use of articulatory suppression during span presentation showed that verbal span dropped, but was still predicted by speech rate. Spatial span was again predicted by the time it took to say digits rather than the time it took to make movements to spatial targets. There would not seem to be any simple analogy between the limitations on verbal span and those on spatial span. In addition, the relationship between speech rate and sequential memory performance may be more complex than previous studies have suggested.     

The Impact of Adolescents' News and Action Movie Viewing on Risky Driving Behavior: A Longitudinal Study

Traffic crashes remain an important cause of injury and death among young people. The aim of the current study was to examine whether adolescents' viewing of particular television genres predicted later risky driving. Data were collected with a two‐wave panel survey (N = 426); structural equation modeling was used to examine the relationships between television viewing and self‐reported risky driving. Theoretically, the study was framed within cultivation theory and the theory of planned behavior. In line with the hypotheses, more news viewing appeared to be an indirect negative predictor of reckless driving, whereas more exposure to action programs was associated with more risk taking in traffic. This relationship was mediated by risk‐taking attitudes and intentions. The implications for prevention are discussed.     

A moral justification for killing in self-defence

In the first part of this paper I will argue that for a case to be one of killing in self-defence at least the following three important conditions need to be met: (i) the defender's death must seem to him/her to be imminent; (ii) there must be a choice forced upon the defender between being killed or killing his/her attacker; (iii) the responsibility for (i) and (ii) must be the attacker's. I go on to point out that a lethal use of force which meets conditions (i)—(iii) is thought by most people to be morally permissible. However we believe also that everyone has the right to life and this cannot be taken away under any circumstances. But if this is so, how can we justify one person intentionally killing another? Or to put the point differently: what, in our moral assessment of such cases, are we to claim an attacker has done that is so morally wrong we are prepared to argue that if one of them has to be killed, it is the attacker? I hope to answer this question in the second part of my paper by developing a strand of ethical thought, associated with Kant.     

Eye movements enhance memory for individuals who are strongly right-handed and harm it for individuals who are not

Subjects who make repetitive saccadic eye movements before a memory test subsequently exhibit superior retrieval in comparison with subjects who do not move their eyes. It has been proposed that eye movements enhance retrieval by increasing interaction of the left and right cerebral hemispheres. To test this, we compared the effect of eye movements on subsequent recall (Experiment 1) and recognition (Experiment 2) in two groups thought to differ in baseline degree of hemispheric interaction—individuals who are strongly right-handed (SR) and individuals who are not (nSR). For SR subjects, who naturally may experience less hemispheric interaction than nSR subjects, eye movements enhanced retrieval. In contrast, depending on the measure, eye movements were either inconsequential or even detrimental for nSR subjects. These results partially support the hemispheric interaction account, but demand an amendment to explain the harmful effects of eye movements for nSR individuals.     

Psychological trauma and schizotypal personality disorder

Two studies examined the relation between psychological trauma and schizotypal symptoms. In Study 1, in which 1,510 adults completed telephone interviews, both childhood maltreatment and the experience of an injury or life-threatening event were significantly associated with schizotypal symptoms. In Study 2, in which 303 adults (oversampled for having elevated levels of schizotypal symptoms) completed extensive in-person assessments, both childhood maltreatment and meeting posttraumatic stress disorder (PTSD) Criterion A were significantly associated with schizotypal symptoms. The links between schizotypal symptoms and at least some forms of psychological trauma could not be fully accounted for by shared variance with antisocial and borderline personality disorders, absorption/dissociation, PTSD symptom severity, family history of psychotic disorder, or signs of neurodevelopmental disturbance (as indexed by minor physical anomalies and inconsistent hand use). Schizotypal symptoms were more strongly associated with childhood maltreatment among men than among women, whereas schizotypal symptoms were more strongly associated with PTSD Criterion A among women than among men. Finally, among men, the association between childhood maltreatment and schizotypal symptoms was moderated by signs of neurodevelopmental disturbance.     

“It would have been worse under Saddam:” Implications of counterfactual thinking for beliefs regarding the ethical treatment of prisoners of war

In response to criticism following news of the mistreatment of Iraqis at the US prison in Abu Ghraib, some media personalities and politicians suggested that the treatment of these prisoners “would have been even worse” had former Iraqi President Saddam Hussein still been in power. It was hypothesized that the contemplation of this argument has undesirable consequences because counterfactual thinking can elicit both contrastive and assimilative effects. In the reported study, participants considered how the prisoners at Abu Ghraib would have been worse off under Saddam. The results revealed that generating downward counterfactuals made participants feel better about Abu Ghraib (thereby evidencing contrast), and also lowered ethical standards regarding how the US should treat prisoners of war in the future (thereby evidencing assimilation).