Embodied spatial transformations: "body analogy" for the mental rotation of objects

The cognitive advantage of imagined spatial transformations of the human body over that of more unfamiliar objects (e.g., Shepard-Metzler [S-M] cubes) is an issue for validating motor theories of visual perception. In 6 experiments, the authors show that providing S-M cubes with body characteristics (e.g., by adding a head to S-M cubes to evoke a posture) facilitates the mapping of the cognitive coordinate system of one's body onto the abstract shape. In turn, this spatial embodiment improves object shape matching. Thanks to the increased cohesiveness of human posture in people's body schema, imagined transformations of the body operate in a less piecemeal fashion as compared with objects (S-M cubes or swing-arm desk lamps) under a similar spatial configuration, provided that the pose can be embodied. If the pose cannot be emulated (covert imitation) by the sensorimotor system, the facilitation due to motoric embodiment will also be disrupted.     

Nation building and the politics of Islamic internationalism in Guinea: toward an understanding of Muslims’ experience of globalization in Africa

This article discusses the historical role of Islam in the political evolution of Guinea in the broader context of Muslims’ experience of nation/state building and globalization in Africa. This role is examined on the premise that Islam is one of the major globalizing forces (more in the body of the paper on this idea of Islam as a globalizing force) responsible for the formation of what experts have conceptualized as Africa’s “triple heritage” or the juncture of African traditional values, Islamic influence, and the legacy of Western colonialism. The article examines Islam’s role in the creation of cultural identities, territorial polities, and complex regional and trans-continental networks of trade and scholarship in pre-colonial West Africa; the formation of fronts of resistance to European colonial conquest and occupation; and the mobilization of new nationalist forces which sparked the national liberation struggle of the 1940s and 1950s in the region. The discussion of key concepts such as nationalism, nation/state building, internationalism, and globalization exposes the limited applicability of existing theories to the African experience by highlighting the complexity of post-colonial cultural reconstruction and nation building on the continent. From this perspective, the article focuses upon the political and ideological contradictions having marked the relations of the regime of the Parti Démocratique de Guinée (PDG) under President Ahmed Sékou Touré and conservative Guinean Muslim circles in the early years of independence, due in part to Touré’s Marxist and socialist leanings of the time. Also comprehensively discussed is this regime’s subsequent ideological incorporation and diplomatic use of Islam in an effort to curb anti-PDG opposition at home and abroad and to free itself from isolation by the West. Hence, President Touré’s successful policy of “offensive diplomatique” geared primarily toward Arab and Muslim nations and organizations but also, though somewhat indirectly, toward Western powers, serves as an example of the dynamics of Islamic internationalism in Cold War global affairs. Past experiences of party-centered and state-controlled regimentation of religious organizations under Touré’s state-party regime is compared to the current trend of self-decentralization and self-internationalization of Islamic forces in light of the challenges of religious radicalism and post-Cold War politics in Africa.

ERPs associated with visual duration discriminations in prefrontal and parietal cortex

An event-related potentials (ERP) study was undertaken to examine the role of prefrontal and parietal association cortices on selective attention and short-term memory functions in a duration discrimination task. Subjects performed better when discriminating the first stimulus relative to the second and not the reverse. Two contingent negative variations (CNV) were obtained for each stimulus duration at prefrontal regions, as well as two P300s at parietal regions. The CNV(S1) component recorded during the first stimulus (S1) appeared to be involved in selective attention at bilateral sites, while the P300(S1) component in the left hemisphere may be implicated in retaining it. The CNV(S2) wave, displayed during the second stimulus (S2), at bilateral sites and the right-sided P300(S2) wave seem to be implicated in working memory. The results indicate that recorded activity at prefrontal and parietal association cortices is tightly linked to task parameters and behavioral performances.     

A Voxel-based lesion study on facial emotion recognition after circumscribed prefrontal cortex damage

Previous studies have shown inconsistent findings regarding the contribution of the different prefrontal regions in emotion recognition. Moreover, the hemispheric lateralization hypothesis posits that the right hemisphere is dominant for processing all emotions regardless of affective valence, whereas the valence specificity hypothesis posits that the left hemisphere is specialized for processing positive emotions while the right hemisphere is specialized for negative emotions. However, recent findings suggest that the evidence for such lateralization has been less consistent. In this study, we investigated emotion recognition of fear, surprise, happiness, sadness, disgust, and anger in 30 patients with focal prefrontal cortex lesions and 30 control subjects. We also examined the impact of lesion laterality on recognition of the six basic emotions. The results showed that compared to control subjects, the frontal subgroups were impaired in recognition of three negative basic emotions of fear, sadness, and anger – regardless of the lesion laterality. Therefore, our findings did not establish that each hemisphere is specialized for processing specific emotions. Moreover, the voxel-based lesion symptom mapping analysis showed that recognition of fear, sadness, and anger draws on a partially common bilaterally distributed prefrontal network.     

Liquid zinc embrittlement of a high-manganese-content TWIP steel

The cracking resistance of a twinning induced plasticity (TWIP) steel with high-manganese content has been studied in relation to the liquid metal embrittlement phenomenon. This phenomenon was investigated by hot tensile tests carried out on electrogalvanised specimens using a Gleeble® simulator at temperatures ranging from 600°C to 1000°C. The results show that this steel can be embrittled by liquid zinc within a limited range of temperature depending on strain rate.     

Community Counselling in African Contexts

This article explores community counselling as a form of professional practice for psychologists, with a particular focus on practices that are relevant in African contexts. The discussion identifies and discusses various models of practice identified in community psychology, including an ecological perspective, a public health and community mental health framework, interventions that focus on promoting a sense of community, indigenous approaches to community counselling and a critical or social action framework. Examples relating to each of these models of practice are drawn from various African settings, providing practitioners with some insights into how theory can be operationalised into practices that are relevant to African contexts. The article concludes with a discussion on community research, with a particular focus on ethical considerations relevant to a community approach in African contexts. The latter discussion emphasises the importance of working with the community as partners, and suggests the possibility of developing a Code of Ethics aimed specifically at guiding community counselling practice in African contexts.     

Tel Aviv Mizrah

Before immigrating to Israel, first-generation Iraqi Jews were deeply attached to their identity as Mizrahi Jews. Their mother tongue was Arabic and they had grown up in an oriental environment. Therefore, it was not easy for them to adopt the Euro-Israeli identity that the dominant Ashkenazi-European stratum in Israel compelled them to accept. Despite strong Westernizing tendencies in Israeli society, the first generation of Iraqi Jewish immigrants maintained strong links to the Iraqi customs and traditions they had acquired in Iraq, particularly with regard to the musical folklore and oriental cuisine. On the other hand, second-generation Iraqi Jews were more familiar with Israeli society than their parents; they grew up in Israel and learned Hebrew in Israeli schools along with Ashkenazi Jews and other ethnic groups. This paper establishes connections between the historical realities of Iraqi Jewish immigrants and the literary representation of their world in the trilogy Tel-Aviv Mizrah (Tel Aviv East) written in 2003 by the Iraqi Jewish author Shimon Ballas, through a comparison of Ballas's literary vision with the historical realities of Iraqi Jewish identity in Israel over the course of two generations.     

The Oxford Happiness Questionnaire: Transformation from an Ordinal to an Interval Measure Using Rasch Analysis

The scientific study of happiness requires accurate measurement of the construct that satisfies assumptions of parametric statistics and thus allows both researchers and clinicians to make reliable and valid comparisons with the relevant data sources. The 29-item Oxford Happiness Questionnaire (OHQ) is a widely-used scale for assessment of personal happiness. While its psychometric properties are acknowledged to be acceptable, it presents scores on an ordinal scale and may thus not discriminate precisely between individual happiness levels. The current study aimed to improve precision and item functioning of the OHQ by applying Rasch analysis to a sample of 281 participants. To correct disordered thresholds items were rescored in a uniform fashion. Four items displayed poor relationships with the latent trait of happiness and were removed. Best fit to the unidimensional Rasch model was achieved after locally dependent items were combined into subtests and adjusted for personal differences. Using the ordinal-to-interval conversion tables published here, ordinal OHQ scores can now be transformed to interval level data and thus subjected to parametric statistical analysis without violating fundamental assumptions. The precision of the instrument can be improved significantly by these minor modifications without the need to modify the original response format.