Visually guided grasping of common objects: Effects of priming

Priming effects were tested on the planning of the grasping of common objects under full vision during action performance. Healthy participants took part in four experiments which manipulated the nature of the prime (objects, circular block, rectangular bar) and priming context (blocked vs. mixed). Each experiment relied on four priming conditions: (1) congruent orientation, (2) incongruent orientation, (3) neutral prime, and (4) no prime. Priming was observed to have a facilitating effect on visually guided grasping when the object to be grasped was primed by a congruently oriented identical object. This effect was rather independent of the priming context (experimental set-up). Our data suggest an object's functional identity may contribute to the priming effect, as well as its intrinsic (e.g., shape, size) and extrinsic (orientation) visual characteristics. We showed that the planning of visually guided grasping is influenced by prior visual experience, and thus that grasping is not based exclusively on real-time processing of visual information.     

Incidental Finding of Tumor While Investigating Subarachnoid Hemorrhage: Ethical Considerations and Practical Strategies

High-resolution neuroimaging modalities are used often in studies involving healthy volunteers. Subsequently, a significant increase in the incidental discovery of asymptomatic intracranial abnormalities raised the important ethical issues of when follow-up and treatment may be necessary. We examined the literature to establish a practical set of criteria for approaching incidental findings. Our objective is to develop an algorithm for when follow-up may be important and to provide recommendations that would increase the likelihood of follow-up. A systematic literature search was performed using the PubMed and MEDLINE databases to identify articles describing brain tumors and intracranial aneurysms. The treatment algorithm we present suggests that incidental intracranial masses suspicious for glioma should be biopsied or resected, while other masses are to be followed with serial imaging based on the expected growth pattern. Lack of follow-up can result in adverse outcomes that can be mitigated by using technology to facilitate communication and improve follow-up care. The importance of training physicians to be good communicators is also stressed. New technology including automated telephone systems, texting and email will improve access to patients and hopefully encourage compliance and follow-up.     

Inattentive behaviour is associated with poor working memory and slow processing speed in very pre‐term children in middle childhood

Background. Problem behaviour is common following pre‐term birth, but the underlying nature of these difficulties is not well known. Aims. We sought to establish the mechanisms underpinning behavioural difficulties in very pre‐term (VPT) children in middle childhood by comparing their performance to that of term born peers on tasks of working memory, inhibition, and processing speed, and relating these to parent and teacher assessments of their behaviour. Particular focus was given to inattention and overactive/impulsive behaviour, as these behaviours have been associated with different neuropsychological problems in term children. Samples. A group of VPT children (gestational age < 31 weeks, N= 56) aged 9–10 years and term controls (N= 22) participated in the study. Method. Children were assessed with measures of working memory, inhibition, and processing speed. Parents and teachers reported behavioural problems using the Strengths and Difficulties Questionnaire and two additional scales measuring overactive/impulsive behaviour and inattention. Results. Results revealed increased rates of problem behaviour in VPT compared to term children for parent‐rated total difficulties, hyperactivity, emotional problems, peer problems, prosocial behaviour, overactive/impulsive behaviour, and parent‐ and teacher‐rated inattention. Processing speed and working memory, but not inhibition, were significantly related to inattentive and overactive/impulsive behaviour. Conclusions. The increased rates of inattention and overactive/impulsive behaviour in VPT children may be explained by impairment in processing speed and working memory. Expected links between overactive/impulsive behaviour and inhibitory control were not identified, suggesting the nature of such difficulties may be different in VPT compared to term children.     

The effects of group memberships of victims and perpetrators in humanly caused disasters on charitable donations to victims

The effects of group memberships of disaster victims and perpetrators on charitable donations were measured. In Study 1 (N = 92), victim group membership was experimentally varied to demonstrate an ingroup bias. In Study 2 (N = 84), a similar bias was demonstrated by varying perpetrator group membership. In Study 3 (N = 182), both victim and perpetrator group memberships were assessed. Perpetrator group membership interacted with victim group membership. Moreover, donations were highest when both victims and perpetrators shared a group membership. These effects were mediated by empathy with the victims, and perceived responsibility of the donor to intervene and aid the victim. Findings show that a salient perpetrator group can be harnessed to encourage helping of disaster victims.     

We all live in Germany but … Ingroup projection,group‐based emotions and prejudice against immigrants

Immigration, cultural diversity and integration are among the most central challenges for modern societies. Integration is often impeded by negative emotions and prejudices held by the majority members towards immigrants in a common society. Based on the ingroup projection model (Mummendey & Wenzel, 1999), we examined the impact of perceived relative ingroup prototypicality on intergroup emotions and prejudice. Additionally, we examined whether this impact is causal and explored the issue of causality in more detail contrasting a linear causal model with bi‐directional or reciprocal causality. Hypotheses were tested in a study with a two‐wave panel of majority members (N=1085) in Germany. We examined the proposed relations between relative ingroup prototypicality, intergroup emotions and prejudice and determined the causal direction of these relationships. Results support the predictive power of relative ingroup prototypicality on intergroup emotions and prejudice. Moreover, most causal relations between our measures are reciprocally causal. We discuss the implications of these findings for the general conception of prejudice and intergroup emotions. Copyright © 2009 John Wiley & Sons, Ltd.     

Swimming and Speaking Spanish

The dominant view of the status of knowledge of language is that it is theoretical or what Gilbert Ryle called knowledge-that. Defenders of this thesis may differ among themselves over the precise nature of the knowledge which underlies language, as for example, Michael Dummett and Noam Chomsky differ over the issue of unconscious knowledge; however, they all agree that acquisition, understanding and use of language require that the speaker have access to a theory of language. In this paper, I argue that this view is mistaken. Knowledge of language is properly seen as practical knowledge, knowledge-how. My target is Michael Dummett’s treatment of theory of meaning in The Seas of Language. If my argument goes through, underlying assumptions about the nature of cognition as computational must be adjusted to allow for other forms of knowledge, which are arguably more basic, and which underlie knowledge-that.     

Intensional Protocols for Dynamic Epistemic Logic

Journal of Philosophical Logic - In dynamical multi-agent systems, agents are controlled by protocols. In choosing a class of formal protocols, an implicit choice is made concerning the types of...     

Incarcerated and Court‐Involved Adolescents: Counseling an At‐Risk Population

In this article, the authors provide the counselor wishing to work with incarcerated adolescents with background information relating to the current scope of the problem and the current state of the juvenile justice system in the United States. The authors also review the current research regarding juvenile delinquency and outline a series of clinical techniques. The authors close by providing a developmental framework for enhancing the understanding of and guiding treatment for this difficult population.     

Women and Alcoholism: A Biopsychosocial Perspective and Treatment Approaches

Viewing alcoholism in women from a biopsychosocial perspective reveals a unique set of circumstances and challenges that women alcoholics face when compared with men. Biologically, women react differently to alcohol ingestion than do men. Women reach higher blood alcohol levels and sustain more somatic and cognitive damage than men when consuming equivalent amounts of alcohol. Psychosocially, women alcoholics face societal rebuke and chastisement of a greater magnitude than do men. Finally, barriers to treatment faced by women, such as the need for child care, cost of treatment, familial opposition, denial of alcoholism, and inadequate diagnostic training of physicians, must be overcome to create successful treatment approaches for the female alcoholic. Obstacles to and implications for treatment are also discussed.