Perceptual identification across the life span: a dissociation of early gains and late losses

The age-correlated gains and losses in visual identification under backward pattern masking were studied in a representative sample of 226 individuals ranging from 6 to 88 years of age. Participants identified masked symbols at leisure under high and low stimulus quality and at varying Stimulus Onset Asynchronies. Performance increased from childhood to early adulthood and then decreased, describing the common inverted U-shaped function. However, measures of general processing speed accounted for the gains in childhood and adolescence but not for losses in older age. This asymmetry between child development and aging is inconsistent with general-factor lifespan theories of cognitive development and suggests that specific mechanisms underlying visual identification during child development and aging are different.     

Modes of action of family interventions in depression and schizophrenia: the same or different?

The role of relatives' expressed emotion (EE) in mediating the efficacy of family interventions has been studied in randomized controlled trials (RCTs) involving people with schizophrenia and depression. Reanalysis of two RCTs (n=48) by Leff (1989) indicated that lowering relatives' EE and/or reducing social contact between the patient and family members accounted for the efficacy of the intervention for schizophrenia. However, this relationship has not been investigated previously with regard to depression, and this paper presents the results of a recent RCT which included measurement of EE and other possible mediating variables. In this study, amelioration of the critical attitude of the partner did not account for the superiority of couples therapy over antidepressant medication, since the same change occurred in the drug group. However, reducing the patient's exposure to the partner's hostility partially explained the efficacy of couples therapy. Further research on the process of change in families undergoing therapy is indicated to identify the variables that account for the efficacy of therapy.     

Alcohol and Acquaintance Rape in Australia: Testing the Presupposition Model of Attributions About Responsibility and Blame1

According to the presupposition model of attributions about responsibility and blame (Bradbury & Fincham, 1990), an attribution of blame presupposes an attribution of responsibility. Both constructs share the dimensions of choice, intention, and accountability, but an additional dimension of liability relates only to blame. Reactions of 260 university students to acquaintance‐rape scenarios portraying different levels of alcohol intoxication were examined. Results showed that the model's dimensions explained much of the variance in attributions of responsibility and blame, although the hierarchical structure was not supported. Mediational analyses suggest that different attributional principles apply when assigning victim and perpetrator responsibility, which may explain why intoxicated victims are assigned more responsibility than sober victims, but intoxicated perpetrators are assigned less responsibility than sober perpetrators.     

Increases in language lateralization in normal children as observed using magnetoencephalography

Previous functional magnetic resonance imaging (fMRI) studies investigating hemispheric dominance for language have shown that hemispheric specialization increases with age. We employed magnetoencephalography (MEG) to investigate these effects as a function of normal development. In sum, 22 healthy children aged 7-16 years were investigated using two language tasks: a verb-generation (VG) task and a vowel-identification (VI) task. Significant hemispheric differences were found for both tasks in cerebral language areas using oscillatory MEG spectral analyses, confirming the MEG's ability to detect hemispheric specialization for language in children. Additionally, a significant increase of this lateralization as a function of age was observed for both tasks. As performance in the VI task showed no correlation with age, this increase seems to be unrelated to performance. These results confirm an increase in hemispheric specialization as a function of normal brain maturation.     

The neural mechanisms of word order processing revisited: electrophysiological evidence from Japanese

We present two ERP studies on the processing of word order variations in Japanese, a language that is suited to shedding further light on the implications of word order freedom for neurocognitive approaches to sentence comprehension. Experiment 1 used auditory presentation and revealed that initial accusative objects elicit increased processing costs in comparison to initial subjects (in the form of a transient negativity) only when followed by a prosodic boundary. A similar effect was observed using visual presentation in Experiment 2, however only for accusative but not for dative objects. These results support a relational account of word order processing, in which the costs of comprehending an object-initial word order are determined by the linearization properties of the initial object in relation to the linearization properties of possible upcoming arguments. In the absence of a prosodic boundary, the possibility for subject omission in Japanese renders it likely that the initial accusative is the only argument in the clause. Hence, no upcoming arguments are expected and no linearization problem can arise. A prosodic boundary or visual segmentation, by contrast, indicate an object-before-subject word order, thereby leading to a mismatch between argument "prominence" (e.g. in terms of thematic roles) and linear order. This mismatch is alleviated when the initial object is highly prominent itself (e.g. in the case of a dative, which can bear the higher-ranking thematic role in a two argument relation). We argue that the processing mechanism at work here can be distinguished from more general aspects of "dependency processing" in object-initial sentences.     

“To Protect and to Serve?”: An Exploration of Police Conduct in Relation to the Gay,Lesbian, Bisexual,and Transgender Community

While there are studies that focus specifically on hate crimes, especially anti-lesbian, gay, bisexual, and/or transgender motivated violence, little research has been done to examine the role that law enforcement officials play in responding to crimes related to the Gay/Lesbian/Bisexual/Transgender (GLBT) community. This study, therefore, attempts to do just that. Using traditional content-analysis techniques, we examine 1,896 incident reports that were collected by a GLBT advocacy group in Minnesota, between 1990 and 2000, to begin to understand the range of police responses in relation to the GLBT community. Results indicate that while police conduct improved, negative responses and behaviors on the part of law enforcement officials outnumbered positive responses. The most common complaint by Helpline callers was inadequate response by the police; there were also numerous callers indicating that they were further victimized at the hands of the law enforcement officials. The data suggest a continued need for the education of law enforcement officials regarding issues facing the GLBT community, advocacy for victims of crime who are many times reluctant to report an incident to the police and increased attention to issues of oversight and accountability for officers who are responding to calls for help from the GLBT community.

Individual differences in components of reaction time distributions and their relations to working memory and intelligence

The authors bring together approaches from cognitive and individual differences psychology to model characteristics of reaction time distributions beyond measures of central tendency. Ex-Gaussian distributions and a diffusion model approach are used to describe individuals' reaction time data. The authors identified common latent factors for each of the 3 ex-Gaussian parameters and for 3 parameters central to the diffusion model using structural equation modeling for a battery of choice reaction tasks. These factors had differential relations to criterion constructs. Parameters reflecting the tail of the distribution (i.e., tau in the ex-Gaussian and drift rate in the diffusion model) were the strongest unique predictors of working memory, reasoning, and psychometric speed. Theories of controlled attention and binding are discussed as potential theoretical explanations.     

Preceding stimulus awareness augments offset-evoked potentials: Evidence from motion-induced blindness

Event-related potentials (ERPs) were measured in response to the objective offset of a visual disk under two physically similar conditions: (1) visible conditions in which the target disk was well perceived and (2) invisible conditions in which participants reported to have not seen the target because of motion-induced blindness (Bonneh, Cooperman, & Sagi in Nature 411:798-801, 2001). Electrophysiological responses to the physical offset of the target disk were almost completely absent in the invisible conditions (Experiment 2). In the same conditions, the physical offset was almost completely invisible (Experiment 1). Results suggest an augmenting function of prior awareness of a stimulus for the offset-triggered ERP of that stimulus.