Fiber tracking using magnetic resonance diffusion tensor imaging and its applications to human brain development

Diffusion tensor imaging is unique in its ability to noninvasively visualize white matter fiber tracts in the human brain in vivo. Diffusion is the incoherent motion of water molecules on a microscopic scale. This motion is itself dependent on the micro-structural environment that restricts the movement of the water molecules. In white matter fibers there is a pronounced directional dependence on diffusion. With white matter fiber tracking or tractography, projections among brain regions can be detected in the three-dimensional diffusion tensor dataset according to the directionality of the fibers. Examples of developmental changes in diffusion, tracking of major fiber tracts, and examples of how diffusion tensor tractography and functional magnetic resonance imaging can be combined are provided. These techniques are complimentary and allow both the identification of the eloquent areas of the brain involved in specific functional tasks, and the connections between them. The noninvasive nature of magnetic resonance imaging will allow these techniques to be used in both longitudinal developmental and diagnostic studies. An overview of the technique and preliminary applications are presented, along with its current limitations.     

Relationships between Turkish Eighth-Grade Students’ Oral Reading Efficacy,Reading Comprehension and Achievement Scores on a High-Stakes Achievement Test

The present study aimed to explore the relation between students’ oral reading efficacy, reading comprehension, and academic performance on a nationwide high school placement exam (TEOG). The students were selected from a public middle school. The students’ oral reading efficacy, comprehension, and TEOG achievement scores were obtained to figure out the relations between them. The students’ TEOG results were obtained from the school administration. The findings revealed that there were statistically significant relations between oral reading efficacy, reading comprehension and TEOG achievements. Particularly, students’ reading comprehension and accuracy skills together explained 57% of variance in overall TEOG achievements.     

Gender differences in emotional experiences across childhood,romantic relationship,and self-defining memories

The aim of the present study is to examine the gender differences in emotional experiences across three different types of autobiographical memory. A total of 612 undergraduate students from Izmir, Turkey, were asked to recall a memory either from childhood, from romantic relationships, or from self-defining experiences. A gender difference was found in the intensity of anxiety, sadness, and pride for romantic relationship memories. Men had higher scores on emotional distancing than women in self-defining memories. With regard to emotional valance, women’s feelings were less positive than men’s feelings when remembering childhood and romantic relationship experiences, whereas they were more positive than men’s feelings when remembering self-defining experiences. The findings support the notion that gender differences in emotional experiences during the autobiographical recollection of personal life events vary across different memory types.     

Does witnessing gender discrimination predict women's collective action intentions for gender justice? Examining the moderating role of perceived female support

Previous research has indicated that witnessing gender discrimination may instigate women's participation in collective action for gender justice. However, relatively little is known about the role of perceived female support in motivating collective action among women who witness gender discrimination in public life. This study aims to analyse whether and when perceived support from feminist-minded women moderates the association between women's witnessing gender discrimination and their willingness to engage in collective action for gender justice. We argue that the association between witnessing gender discrimination and willingness to engage in collective action depends on the support women perceive from their female friends and family members. In studies of women in the U.S. (Study 1; N = 271) and Ukraine (Study 2; N = 256), witnessing gender discrimination predicted greater willingness to participate in collective action for gender justice, and this association was stronger when female support was perceived to be lower. Study 3 (N = 1,304) replicated the findings of Studies 1 and 2 with self-identified feminist women in Turkey. Our research offers novel insights regarding why perceived lack of female support may encourage women to engage in collective action for gender justice.     

The Role of Personal Centrality of Ingroup Victimhood in Intergroup Relations and Political Agenda in Northern Ireland

Even though the violent conflicts during the Troubles officially ended decades ago, the memories of violence and division between Catholics and Protestants linger in Northern Ireland. We argue that the personal centrality of collective victimhood, which is formed by the memory and perception of past and ongoing victimization, may play an important role in people's attitudes in postconflict societies. The current study investigated both the antecedents and outcomes of the personal centrality of ingroup victimhood in Northern Ireland and examined the vital role it plays in the aftermath of a violent intergroup conflict among Catholics and Protestants. The results demonstrated that ongoing experiences of victimization such as personal and group-level discrimination and memories of personal and close others' suffering are strongly related to people's personal centrality of ingroup victimhood. The centrality of ingroup victimhood, in turn, predicted various strategies for intergroup interaction and policy preferences such as collective action, support for nonviolence, and attitudes toward reunification of Ireland, which were moderated by group membership. The findings provide empirical evidence for the role of the centrality of ingroup victimhood as a link between experiences of victimization and intergroup interactions as well as policy preferences.     

The role of appearance and motion in action prediction

We used a novel stimulus set of human and robot actions to explore the role of humanlike appearance and motion in action prediction. Participants viewed videos of familiar actions performed by three agents: human, android and robot, the former two sharing human appearance, the latter two nonhuman motion. In each trial, the video was occluded for 400?ms. Participants were asked to determine whether the action continued coherently (in-time) after occlusion. The timing at which the action continued was early, late, or in-time (100, 700 or 400?ms after the start of occlusion). Task performance interacted with the observed agent. For early continuations, accuracy was highest for human, lowest for robot actions. For late continuations, the pattern was reversed. Both android and human conditions differed significantly from the robot condition. Given the robot and android conditions had the same kinematics, the visual form of the actor appears to affect action prediction. We suggest that the selection of the internal sensorimotor model used for action prediction is influenced by the observed agent's appearance.     

The role of leadership perception as a mediator between managers’ self-monitoring and subordinate attitudes

Although the role of social cognition in leadership perception has been emphasized frequently in recent years, research using this approach in an organizational context is rare. This study investigated subordinates’ perceptions of their managers as leaders (that is, to what extent they perceive their manager as a leader) as a potential mediating factor explaining the relationship between managers’ self-monitoring and their subordinates’ attitudes toward their organizations. The study was carried out with middle-level managers (N = 64) and their subordinates (N = 210) from various business organizations in Turkey. Results indicate that subordinates’ leadership perceptions of their managers mediate the relationship between managers’ self-monitoring and their subordinates’ affective and normative organizational commitment. These results provide insight into some of the antecedents and outcomes of leadership perception.     

Creativity through Connectedness: The Role of Closeness and Perspective Taking in Group Creativity

Achievements in various fields of creativity are resulting more and more from collaborative teams. This research investigated the role of interpersonal process variables, namely closeness and perspective taking in group creativity, with a 2 by 2 experimental design. Sixty-one 3-person groups assigned to 4 conditions (a: closeness and perspective taking, b: perspective taking, c: no closeness and no perspective taking, d: closeness). Group members collaboratively wrote stories that were rated by 3 independent expert judges. There was a positive main effect of closeness and negative main effect of perspective taking on group creativity scores. Moreover, the significant interaction between perspective taking and closeness displayed that combination of closeness with perspective taking negatively affect group creativity. These results indicate that closeness might be beneficial for group creativity only when it is not accompanied with perspective taking.     

Development and psychometric properties of a new measure for memory phenomenology: The Autobiographical Memory Characteristics Questionnaire

The purpose of this study is to develop a valid and reliable measure for the phenomenology of autobiographical memories. The psychometric properties of the Autobiographical Memory Characteristics Questionnaire (AMCQ) were tested in three studies: the factor structure of the AMCQ was examined for childhood memories in Study 1 (N = 305); for autobiographical memories related to romantic relationships in Study 2 (N = 197); and for self-defining memories in Study 3 (N = 262). The explanatory factor analyses performed for each memory type demonstrated the consistency of the AMCQ factor structure across all memory types; while a confirmatory factor analysis on the data garnered from all three studies supported the constructs for the autobiographical memory characteristics defined by the researchers. The AMCQ consists of 63 items and 14 factors, and the internal consistency values of all 14 scales were ranged between .66 and .97. The relationships between the AMCQ scales related to gender and individual emotions, as well as the intercorrelations among the scales, were consistent with both theoretical expectations and previous findings. The results of all the three studies indicated that this new instrument is a reliable and robust measure for memory phenomenology.