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Yayın Are your cross-ethnic friends ethnic and/or national group identifiers?The role of own and perceived cross-ethnic friend's identities on outgroup attitudes and multiculturalism(Wiley, 2018-02-01) Bağcı Hemşinlioğlu, Sabahat Çiğdem; Çelebi, ElifWe investigated how own ethnic and national identities and perceived ethnic and national identities of close cross-ethnic friends may predict outgroup attitudes and multiculturalism among Turkish (majority status, N=197) and Kurdish (minority status, N=80) ethnic group members in Turkey (M-age=21.12, SD=2.59, 69.7% females, 30.3% males). Compared with Turkish participants, Kurdish participants were more asymmetrical in rating their cross-ethnic friend's identities relative to their own, reporting higher ethnic identity, but lower national identity for themselves. Own ethnic identity was negatively associated with attitudes and multiculturalism, whereas own national identity was positively associated with only attitudes. Perceived cross-ethnic friend's national identity was positively related to both outgroup attitudes and multiculturalism. Shared national identification (high levels of own and friend's national identity) led to most positive outgroup attitudes and highest support for multiculturalism. Findings were discussed in the light of social identity and common ingroup identity models.Yayın Collective victimhood beliefs among majority and minority groups: Links to ingroup and outgroup attitudes and attribution of responsibility for conflict(Pergamon-Elsevier Science Ltd, 2018-09) Bağcı Hemşinlioğlu, Sabahat Çiğdem; Piyale, Zeynep Ecem; Karaköse Çelik, Selin; Şen, EzgiWe examined perceived ingroup and outgroup victimhood beliefs across group status and how these were uniquely associated with ingroup and outgroup attitudes and attribution of responsibility among majority (Turkish, N = 141) and minority (Kurdish, N = 86) group members in Turkey. We further explored whether the extent to which collective victimhood beliefs were shared via ingroup and outgroup members predicted our dependent measures beyond the subjective perception of ingroup victimhood. Findings showed that both groups perceived higher ingroup victimhood compared to outgroup victimhood and this difference was more pronounced among the minority group. Perceived outgroup victimhood beliefs, compared to ingroup victimhood beliefs, were more closely related to intergroup outcomes, and led to more positive outgroup and more negative ingroup outcomes. Both groups shared collective victimhood beliefs more with their ingroup friends than their outgroup friends and ingroup sharing of collective victimhood was a stronger predictor of intergroup outcomes, relating to more positive ingroup and more negative outgroup outcomes. Outgroup sharing of collective victimhood was related to more positive outgroup attitudes and lower ingroup responsibility among the Turkish group, whereas it was not related to outgroup attitudes and negatively related to ingroup attribution of responsibility among the Kurdish group. Practical and theoretical implications of the findings were discussed.Yayın Thermoluminescence and optically stimulated luminescence properties of natural barytes(Elsevier Ltd, 2010-12) Kitis, George; Güneç Kıyak, Nafiye; Polymeris, George S.Heavy, baryte-loaded, concrete is commonly used as radiation shielding material around high energy particle accelerators. Concrete samples received from a shielding block located at CERN cite contain many crystalline inclusions which were identified as barytes by X-ray diffraction analysis and separated by their color, classified as white, orange and green. Basic properties of thermoluminescence (TL) and optically stimulated luminescence (OSL) signals of these barytes samples such as thermal and optical stability, repeatability and mainly the linearity of both their luminescence responses were investigated as a function of beta dose These results are also discussed regarding detailed investigation on the correlation between TL and OSL signals and their implications for retrospective dosimetryYayın Analyzing language ability in first-episode psychosis and their unaffected siblings: a diffusion tensor imaging tract-based spatial statistics analysis study(Elsevier Ltd, 2024-11) Çabuk, Tuğçe; Şahin Çevik, Didenur; Çakmak, Işık Batuhan; Yılmaz Kafalı, Helin; Şenol, Bedirhan; Avcı, Hanife; Karlı Oğuz, Kader; Toulopoulou, TimotheaSchizophrenia (SZ) is a highly heritable mental disorder, and language dysfunctions play a crucial role in diagnosing it. Although language-related symptoms such as disorganized speech were predicted by the polygenic risk for SZ which emphasized the common genetic liability for the disease, few studies investigated possible white matter integrity abnormalities in the language-related tracts in those at familial high-risk for SZ. Also, their results are not consistent. In this current study, we examined possible aberrations in language-related white matter tracts in patients with first-episode psychosis (FEP, N = 20), their siblings (SIB, N = 20), and healthy controls (CON, N = 20) by applying whole-brain Tract-Based Spatial Statistics and region-of-interest analyses. We also assessed language ability by Thought and Language Index (TLI) using Thematic Apperception Test (TAT) pictures and verbal fluency to see whether the scores of these language tests would predict the differences in these tracts. We found significant alterations in language-related tracts such as inferior longitudinal fasciculus (ILF) and uncinate fasciculus (UF) among three groups and between SIB and CON. We also proved partly their relationship with the language test as indicated by the significant correlation detected between TLI Impoverished thought/language sub-scale and ILF. We could not find any difference between FEP and CON. These results showed that the abnormalities, especially in the ILF and UF, could be important pathophysiological vulnerability indexes of schizophrenia. Further studies are required to understand better the role of language as a possible endophenotype in schizophrenia with larger samples.
