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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/6
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Publication Open Access Self-Help Plus for refugees and asylum seekers; study protocol for a series of individual participant data meta-analyses(Taylor _ Francis, 2021) Karyotaki, Eirini; Sijbrandij, Marit; Purgato, Marianna; Lakin, Daniel; Bailey, Della; Peckham, Emily; Uygun, Ersin; Tedeschi, Federico; Wancata, Johannes; Augustinavicius, Jura; Carswell, Ken; Valimaki, Maritta; van Ommeren, Mark; Koesters, Markus; Popa, Mariana; Leku, Marx Ronald; Anttila, Minna; Churchill, Rachel; White, Ross; Al-Hashimi, Sarah; Lantta, Tella; Au, Teresa; Klein, Thomas; Tol, Wietse A.; Cuijpers, Pim; Barbui, Corrado; Department of Psychology; Acartürk, Ceren; Faculty Member; Department of Psychology; College of Social Sciences and Humanities; 39271Background: refugees and asylum seekers face various stressors due to displacement and are especially vulnerable to common mental disorders. To effectively manage psychological distress in this population, innovative interventions are required. The World Health Organization (WHO) Self-Help Plus (SH+) intervention has shown promising outcomes in reducing symptoms of common mental disorders among refugees and asylum seekers. However, individual participant differences in response to SH+ remain largely unknown. The Individual Participant Data (IPD) meta-analysis synthesizes raw datasets of trials to provide cutting-edge evidence of outcomes that cannot be examined by conventional meta-analytic approaches. Objectives: this protocol outlines the methods of a series of IPD meta-analyses aimed at examining the effects and potential moderators of SH+ in (a) reducing depressive symptoms at post-intervention and (b) preventing the six-month cumulative incidence of mental disorders in refugees and asylum seekers. Method: RCTs on SH+ have been identified through WHO and all authors have agreed to share the datasets of the trials. The primary outcomes of the IPD meta-analyses are (a) reduction in depressive symptoms at post-intervention, and (b) prevention of six-month cumulative incidence of mental disorders. Secondary outcomes include post-traumatic stress disorder symptoms, well-being, functioning, quality of life, and twelve-month cumulative incidence of mental disorders. One-stage IPD meta-analyses will be performed using mixed-effects linear/logistic regression. Missing data will be handled by multiple imputation. Conclusions: these results will enrich current knowledge about the response to SH+ and will facilitate its targeted dissemination. The results of these IPD meta-analyses will be published in peer-reviewed journals.Publication Open Access Neuropsychological function at first episode in treatment-resistant psychosis: findings from the ÆsOP-10 study(Cambridge University Press (CUP), 2019) Kravariti, Eugenia; Demjaha, Arsime; Zanelli, Jolanta; Ibrahim, Fowzia; Wise, Catherine; MacCabe, James H.; Reichenberg, Abraham; Pilecka, Izabela; Morgan, Kevin; Fearon, Paul; Morgan, Craig; Doody, Gillian A.; Donoghue, Kim; Jones, Peter B.; Dazzan, Paola; Lappin, Julia; Murray, Robin M.; N/A; Kaçar, Anıl Şafak; PhD Student; Graduate School of Health SciencesBackground: neuropsychological investigations can help untangle the aetiological and phenomenological heterogeneity of schizophrenia but have scarcely been employed in the context of treatment-resistant (TR) schizophrenia. No population-based study has examined neuropsychological function in the first-episode of TR psychosis. Methods: we report baseline neuropsychological findings from a longitudinal, population-based study of first-episode psychosis, which followed up cases from index admission to 10 years. At the 10-year follow up patients were classified as treatment responsive or TR after reconstructing their entire case histories. Of 145 cases with neuropsychological data at baseline, 113 were classified as treatment responsive, and 32 as TR at the 10-year follow-up. Results: compared with 257 community controls, both case groups showed baseline deficits in three composite neuropsychological scores, derived from principal component analysis: verbal intelligence and fluency, visuospatial ability and executive function, and verbal memory and learning (p valuesâ 0.001). Compared with treatment responders, TR cases showed deficits in verbal intelligence and fluency, both in the extended psychosis sample (t =-2.32; p = 0.022) and in the schizophrenia diagnostic subgroup (t =-2.49; p = 0.017). Similar relative deficits in the TR cases emerged in sub-/sensitivity analyses excluding patients with delayed-onset treatment resistance (p values<0.01-0.001) and those born outside the UK (p values<0.05). Conclusions: Verbal intelligence and fluency are impaired in patients with TR psychosis compared with those who respond to treatment. This differential is already detectable-At a group level-At the first illness episode, supporting the conceptualisation of TR psychosis as a severe, pathogenically distinct variant, embedded in aberrant neurodevelopmental processes.Publication Open Access The bottleneck metaphor of leadership culture: how shared understandings about leadership develop in groups and impede diversity and effectiveness of leaders(Frontiers, 2021) Department of Psychology; Özcan, Muaz; Department of Psychology; Graduate School of Social Sciences and HumanitiesThere are two big problems related to leadership today: unequal representation and high failure rates among leaders. This conceptual paper argues that commonly shared values, assumptions, and beliefs about leadership, i.e., universal leadership culture, are the common cause of both problems. After the concepts and levels related to leadership culture were explained, we introduce a multilevel, multi-actor process model named the bottleneck metaphor of leadership culture. This metaphor describes how leadership cultures are co-constructed by multiple actors based on their involvement in leader selection and reproduce themselves in groups over time based on emergent leaders' characteristics. Next, a diagnostic tool called the leadership mirror is proposed for organizations that want to assess their leadership culture's current state as a starting point for further interventions. Specific suggestions are made for various actors, ranging from individuals to organizations, for their possible roles in preventing undesired leadership cultures.Publication Open Access Gesture use and processing: a review on individual differences in cognitive resources(Frontiers, 2020) Department of Psychology; Özer, Demet; Göksun, Tilbe; Faculty Member; Department of Psychology; College of Social Sciences and Humanities; N/A; 47278Speakers use spontaneous hand gestures as they speak and think. These gestures serve many functions for speakers who produce them as well as for listeners who observe them. To date, studies in the gesture literature mostly focused on group-comparisons or the external sources of variation to examine when people use, process, and benefit from using and observing gestures. However, there are also internal sources of variation in gesture use and processing. People differ in how frequently they use gestures, how salient their gestures are, for what purposes they produce gestures, and how much they benefit from using and seeing gestures during comprehension and learning depending on their cognitive dispositions. This review addresses how individual differences in different cognitive skills relate to how people employ gestures in production and comprehension across different ages (from infancy through adulthood to healthy aging) from a functionalist perspective. We conclude that speakers and listeners can use gestures as a compensation tool during communication and thinking that interacts with individuals' cognitive dispositions.Publication Open Access Culturally shared and unique meanings and expressions of maternal control across four cultures(American Psychological Association (APA), 2021) Cho, Hyun Su; Cheah, Charissa S. L.; Vu, Kathy T. T.; Yavuz, H. Melis; Şen, Hilal H.; Park, Seong-Yeon; Department of Psychology; Selçuk, Bilge; Faculty Member; Department of Psychology; College of Social Sciences and Humanities; 52913Maternal control is a major dimension of parenting and has different meanings, practices, and potential consequences across cultures. The present study aimed to identify and compare mothers' conceptualizations of parenting control across four cultures to reveal a more nuanced understanding regarding the meaning and practices of control: European American, Chinese immigrant. Korean immigrant, and Turkish. Using a semistructured open-ended interview, 100 European American, 102 U.S. Chinese immigrant, 103 U.S. Korean immigrant, and 109 Turkish mothers of preschool-aged children reported the ratings of importance, specific reasons, and strategies for exerting control over their children in daily life. Results revealed both shared and unique conceptualizations of maternal control across four cultures. Specifically, all mothers reported that it is important to express maternal control over their children in order to set behavioral norms/standards, maintain child safety, support social relations and respect for others, provide guidance, and guide moral development. Moreover, mothers discussed utilizing nonphysical punishment, setting and maintaining rules, reasoning/negotiating. consistency, physical punishment and verbal control, showing parents' serious/stern attitude, correction. and psychological control forms of control. However, the levels at which mothers emphasize the different reasons and strategies varied across cultures, reflecting culturally emphasized values. The findings of the present study further enrich our understanding of the complexities of maternal control across cultures.Publication Open Access Examining the importance of the teachers' emotional support for students' social inclusion using the one-with-many design(Frontiers, 2016) Hogekamp, Z.; Blomster, J. K.; Calin, M. C.; Haastrup, L.; van den Berg Y. H. M.; Department of Psychology; Bursalıoğlu, Aslı; Çetinçelik, Melis; Department of Psychology; College of Social Sciences and HumanitiesThe importance of high quality teacher-student relationships for students' well-being has been long documented. Nonetheless, most studies focus either on teachers' perceptions of provided support or on students' perceptions of support. The degree to which teachers and students agree is often neither measured nor taken into account. In the current study, we will therefore use a dyadic analysis strategy called the one-with-many design. This design takes into account the nestedness of the data and looks at the importance of reciprocity when examining the influence of teacher support for students' academic and social functioning. Two samples of teachers and their students from Grade 4 (age 9-10 years) have been recruited in primary schools, located in Turkey and Romania. By using the one-with-many design we can first measure to what degree teachers' perceptions of support are in line with students' experiences. Second, this level of consensus is taken into account when examining the influence of teacher support for students' social well-being and academic functioning.Publication Open Access Editorial: what is wrong with leader emergence?(Frontiers, 2022) Özbilgin, Mustafa F.; Chan, Kim Yin; Department of Psychology; Department of Business Administration; Aycan, Zeynep; Faculty Member; Department of Psychology; Department of Business Administration; College of Social Sciences and Humanities; College of Administrative Sciences and Economics; 5798NAPublication Open Access Worrying about leadership: is it a liability or an advantage for leadership of women and men?(Frontiers, 2022) Karakulak, A.; Köseoğlu, G.; Department of Psychology; Aycan, Zeynep; Başkurt, Ayşe Burçin; Faculty Member; Teaching Faculty; Department of Psychology; College of Social Sciences and Humanities; 5798; 329115Worries about leadership (WAL) is a new construct tapping worries an individual may feel about possible negative consequences of accepting a leadership role. Three studies investigate how WAL is associated with men’s and women’s willingness for leadership and their perceived leadership potential rated by others. The first is a laboratory study on 328 participants, which shows that WAL is negatively associated with women’s willingness for leadership, while it is not related to that of men. The second study, which is a field study with multilevel-nested data from 429 employees and 101 supervisors, reveals that male subordinates are more likely to receive a favorable judgment of leadership potential by their supervisors when their WAL increases, while female subordinates’ WAL is irrelevant to this judgment. The final study, which is an experimental study on 122 supervisors, shows that supervisors view hypothetical male leadership candidates with high WAL as having higher warmth and lower competence (than those with low WAL), which both mediate the effect of WAL on judgments of their leadership potential made by the supervisors. Even though supervisors also view female candidates with high WAL as warmer, this does not evoke higher perceptions of leadership potential. Implications for increasing gender parity in leadership are discussed.Publication Open Access Causal mediation analysis in the presence of post-treatment confounding variables: a Monte Carlo simulation study(Frontiers, 2020) MacKinnon, David P.; Valente, Matthew J.; Department of Psychology; Sakarya, Yasemin Kisbu; Selçuk, Esra Çetinkaya; Faculty Member; Department of Psychology; College of Social Sciences and Humanities; Graduate School of Social Sciences and Humanities; 219275; N/AIn many disciplines, mediating processes are usually investigated with randomized experiments and linear regression to determine if the treatment affects the outcome through a mediator. However, randomizing the treatment will not yield accurate causal direct and indirect estimates unless certain assumptions are satisfied since the mediator status is not randomized. This study describes methods to estimate causal direct and indirect effects and reports the results of a large Monte Carlo simulation study on the performance of the ordinary regression and modern causal mediation analysis methods, including a previously untested doubly robust sequential g-estimation method, when there are confounders of the mediator-to-outcome relation. Results show that failing to measure and incorporate potential post-treatment confounders in a mediation model leads to biased estimates, regardless of the analysis method used. Results emphasize the importance of measuring potential confounding variables and conducting sensitivity analysis.Publication Open Access Random sampling in corpus design: cross-context generalizability in automated multicountry protest event collection(Sage, 2021) Department of Sociology; Yörük, Erdem; Hürriyetoğlu, Ali; Duruşan, Fırat; Yoltar, Çağrı; Faculty Member; Teaching Faculty; Researcher; Department of Sociology; College of Social Sciences and Humanities; 28982; N/A; N/A; N/AWhat is the most optimal way of creating a gold standard corpus for training a machine learning system that is designed for automatically collecting protest information in a cross-country context? We show that creating a gold standard corpus for training and testing machine learning models on the basis of randomly chosen news articles from news archives yields better performance than selecting news articles on the basis of keyword filtering, which is the most prevalent method currently used in automated event coding. We advance this new bottom-up approach to ensure generalizability and reliability in cross-country comparative protest event collection from international and local news in different countries, languages, sources and time periods, which entails a large variety of event types, actors, and targets. We present the results of comparing our random-sample approach with keyword filtering. We show that the machine learning algorithms, and particularly state-of-the-art deep learning tools, perform much better when they are trained with the gold standard corpus from a randomly selected set of news articles from China, India, and South Africa. Finally, we also present our approach to overcome the major ethical issues that are intrinsic to protest event coding.