The prevalence of major depressive disorder (MDD) is growing worldwide, and experiencing violent victimization, especially during childhood, worsens its symptoms and raises the likelihood of being...Show moreThe prevalence of major depressive disorder (MDD) is growing worldwide, and experiencing violent victimization, especially during childhood, worsens its symptoms and raises the likelihood of being victimized again. This study assessed the impact of different forms of child abuse (physical, emotional, sexual) on depressive symptoms in patients with MDD and a recent history of victimization, and whether gender moderates this relationship. Additionally, it investigates whether Internet Emotion Regulation Training (iERT) as an addition to Treatment as Usual (TAU) can reduce emotion regulation difficulties and depressive symptoms in the same population. 153 patients filled in questionnaires and the hypotheses were tested by a hierarchical regression analysis and two repeated measure ANOVAs. Regarding the first research question, a significant association was found between depression and physical- and emotional child abuse, but not sexual abuse. This effect was not moderated by gender. Regarding the second research question, no significant effect was found of adding iERT to TAU on either emotion regulation difficulties or depressive symptoms.Show less
Previous research into the relationship of conscientiousness and self-estimated cognitive ability has yielded discrepant results. An analysis of past research seems to suggest a moderating effect...Show morePrevious research into the relationship of conscientiousness and self-estimated cognitive ability has yielded discrepant results. An analysis of past research seems to suggest a moderating effect of age. Indeed, age seems to be positively correlated with conscientiousness and negatively with self-estimated cognitive ability, implying a negative effect of age on the relationship of conscientiousness and self-estimated cognitive ability. The current study examines this moderating effect of age on the relationship between conscientiousness and self-estimated cognitive ability. We hypothesized to find a correlation between conscientiousness and self-estimated cognitive ability only in the young participant group (<=25). Conscientiousness (BFI-2), self-estimated cognitive ability and several demographic variables including age were established of 135 participants. The average age was 39.8 (SD = 16.7) and 63 percent of participants were female. We found that, in general, participant’s self-estimated their own abilities higher than that of their peers. A positive correlation between age and conscientiousness was present (r= 0.240, p= 0.005). No correlation between conscientiousness and self-estimated cognitive ability was found in the older or younger participant group, and we were unable to demonstrate a moderating effect of age. Our findings suggest no correlation between conscientiousness and self-estimated cognitive ability and no moderating effect of age. Future research should consider the possibility that there exists in fact no effect and further investigate the validity of our findings. More knowledge of the interaction between conscientiousness and self-estimated cognitive ability might help better understand the influence of conscientiousness in mental health and whether self-estimations of cognitive ability can play a role in understanding and predicting cognitive decline, especially as people grow older.Show less
Sensitive parenting is important for promoting the parent-child relationship and children’s emotional, cognitive, and social development. Parental factors related to sensitive parenting are...Show moreSensitive parenting is important for promoting the parent-child relationship and children’s emotional, cognitive, and social development. Parental factors related to sensitive parenting are depression and parental self-efficacy. The aim of this study was to explore the relationship between depression and sensitive parenting, and whether parental self-efficacy mediates this association. Participants were 17 Dutch mothers and 4 Dutch fathers of children aged 3-5 years. Parents played 5-10 minutes with their child during two measurement moments, while the researcher was present through a Microsoft Teams connection. A video of the playing was recorded. In between the two measurement moments, parents completed the Center for Epidemiologic Studies Depression-questionnaire (CES-D) and the Me as a Parent-questionnaire (MaaP). Afterwards, the video recordings were encoded according to the Ainsworth sensitivity scale. Only the relation between depression and sensitivity was significant, where depression was positively related to sensitivity. There was no indication found for a mediational role of parental self-efficacy in the relation between depression and sensitivity. Explanatory theories, limitations and practical implications were discussed. Future research will have to show which other factors can explain these unexpected findings.Show less
The stability of the country and maintaining public order and harmony have been among the top priorities of the government of the small city-state of Singapore, ever since its independence in 1965....Show moreThe stability of the country and maintaining public order and harmony have been among the top priorities of the government of the small city-state of Singapore, ever since its independence in 1965. The People’s Action Party (PAP), which has been in constant rule for over 65 years, has sought to maintain their hegemony and “protect the country” by actively limiting citizens' influence over politics and policies, mainly through the development of legal frameworks repressing dissent across different parts of society. By using theories on contentious politics, state repression, and the political opportunity structure, as well as a qualitative content analysis of Singapore’s laws on dissent, this thesis addresses the following research question: What are the strategies employed by the Singaporean government to repress and prevent dissent, and how do these strategies impact the political opportunity structure for contentious politics? Summarizing the findings, this thesis concludes that the state has built an extensive framework of restrictive laws covering all forms of society, rather than explicitly focusing on certain aspects, which has caused opportunities for dissenting citizens to employ methods of contentious political action to achieve their aims of influencing state policies to be exceptionally limited.Show less
Global temperatures are rising as policymakers aim to tackle the climate challenges our world faces today. The European Union plays a leading role in climate politics and the global reduction of...Show moreGlobal temperatures are rising as policymakers aim to tackle the climate challenges our world faces today. The European Union plays a leading role in climate politics and the global reduction of greenhouse gas emissions through one of its key tools, the Emissions Trading System. This thesis examines the impact of EU member states’ industrial composition on implementing the EU ETS in phase 2 through a comparative analysis of the Netherlands and Belgium. An examination of the correlation between national industries and the national implementation of the ETS has thus far remained absent in the existing literature and provides policy insights for future climate politics. An analysis of the relevant policy documents reveals how both countries varied in their implementation of the system. It demonstrates how the more pollutive industrial composition of the Netherlands caused the government to be more responsive to the affected industries’ interests in the allocation process. However, contrary to expectations, the Netherlands was not more lenient the monitoring of the system and was even more strict than Belgium in most areas.Show less
Previous research has argued the importance of education for future gains (Palomino et al., 2019) and how inequality can negatively affect educational aspirations (Jia et al., 2021). Therefore,...Show morePrevious research has argued the importance of education for future gains (Palomino et al., 2019) and how inequality can negatively affect educational aspirations (Jia et al., 2021). Therefore, this study aimed to further demonstrate whether differences in perceptions of inequality of opportunity and outcome negatively affects students’ educational aspirations. Further, based on previous research demonstrating positive main effect of internal locus of control (Sagone & Caroli, 2014) and a moderating effect of internal locus of control (Jia et al., 2021) on educational outcomes, locus of control was added as a moderator to see if an internal locus of control offsets negative effects of inequality on educational aspirations. Our manipulation, videos explaining inequality of opportunity and outcome, failed to tease apart perceptions of inequality of opportunity and outcome and were consequently combined into one factor, inequality. We found no significant main effect of perception of inequality, but a significant positive main effect of locus of control on educational aspirations. An interaction effect between perceptions of inequality and locus of control on educational aspirations was found. However, unexpectedly, students perceiving inequality within the external locus of control group scored highest on educational aspirations. Implications, limitations, and avenues for further research are discussed.Show less
The exam period can be stressful for students, significantly impacting their lifestyle behaviours. Research indicates that students tend to have poorer diets during exam periods, with stress and...Show moreThe exam period can be stressful for students, significantly impacting their lifestyle behaviours. Research indicates that students tend to have poorer diets during exam periods, with stress and sleep quality potentially influencing this pattern. The decline in diet quality among university students during examinations is a significant social issue that needs to further understanding. The aim of this study was to assess the relationship between exam stress and perceived changes in food choice -healthy or unhealthy eating- during an exam period among university students aged 18 to 25 and to assess to what extent this relationship is mediated by sleep quality during an exam period. Utilizing a cross-sectional design, data was collected from 200 Dutch university students who completed three questionnaires, the Examination Stress Scale, a questionnaire about changes in food choice during an exam period and the Regensburg Insomnia Scale. A mediation analysis was conducted using linear regressions in SPSS. The results indicated no significant relationship between exam stress and changes in food choice (β = .042 , p = .558). There was a significant positive relationship between exam stress and poor sleep quality (β = .44, p < .001). No significant association was found between sleep quality and changes in food choice (β = -.02, p < .770). When controlling for sleep quality, exam stress was still not associated with changes in food choices (β = .05, p < .514). Thus, the present study concluded that there is no relationship between exam stress and perceived changes in food choice -healthy or unhealthy eating- among university students ages 18 to 25 and that this relationship is not mediated by sleep quality during exams. However, there was a significant relationship between exam stress and poor sleep quality. Prevention strategies for exam stress and poor sleep should include stress management and education about the importance of sufficient sleep.Show less
In Europe, more than half of adults are obese (WHO, 2022). Enhancing the self-regulation of energy intake, the ability to respond to one's own hunger or satiety signals, can reduce the risk of...Show moreIn Europe, more than half of adults are obese (WHO, 2022). Enhancing the self-regulation of energy intake, the ability to respond to one's own hunger or satiety signals, can reduce the risk of obesity (DiSantis et al., 2011). Promoting the self-regulation of energy intake as early as possible in development is therefore crucial. The present study examined the relation between maternal sensitivity in different contexts (during free play and during meals) at 18 months and the child's self-regulation of energy intake at 24 months. The sample consisted of 103 mother-child dyads (41.7% boys), obtained from the longitudinal study "Baby's first bites” (Van der Veek et al., 2019). Maternal sensitivity was measured using “the Ainsworth Maternal Sensitivity Scale” (Ainsworth et al., 1974). The self- regulation of energy intake was assessed using an “Eating in Absence of Hunger” paradigm (Schultink et al., 2021). First, no significant relation was found between maternal sensitivity during free play at 18 months and self-regulation of energy intake at 24 months. Second, maternal sensitivity during mealtime at 18 months was not related to self-regulation of energy intake at 24 months. Finally, maternal sensitivity during free play and during mealtime at 18 months did not make a unique contribution to the child's self-regulation of energy intake at 24 months. This study contributed to the emerging research area of parenting practices and the self-regulation of energy intake. Based on the current research, it cannot be stated that maternal sensitivity contributes to the child's self-regulation of energy intake. Therefore, it is not yet clear how parents can best contribute to good self-regulation of energy intake. Follow-up research is needed.Show less
This research aimed to comprehensively understand the demographics and characteristics of transgender and gender diverse (TGD) individuals seeking mental health care upon initiating gender...Show moreThis research aimed to comprehensively understand the demographics and characteristics of transgender and gender diverse (TGD) individuals seeking mental health care upon initiating gender-affirming care. Additionally, it focused on optimal integration of mental health care into gender-affirming care according to TGD individuals. Both were within the framework of an ongoing investigation at the Zaans Medical Centre. The quantitative data analysis consisted of intake questionnaire data of twenty-five TGD individuals, variables were derived from sections of the intake questionnaire. For the qualitative data analysis, seven semi-structured interviews were held with TGD individuals. The characteristics of TGD individuals consisted of self-reported psychological distress and well-being. Their relationship to requested mental health care intensity was studied through Spearman rank order correlations. The demographics included age, educational level, ethnicity, employment status, experienced income, and gender assigned at birth. Their association with requesting mental health care was explored through chi-square tests. A thematic analysis with semantic approach was performed to analyse the data. No significant correlations were found between demographic variables and mental health care requests at admission. The correlation between self-reported psychological distress and mental health care intensity was χ2 = -.003, p = .987, for self-reported psychological well-being and mental health care intensity χ2 = -.001, p = .997. Thematic analysis of interview data yielded three overarching themes: motives for seeking mental health care, recommendations for integrating mental health services into gender-affirming care, and desirable attributes of mental health care providers. Reasons for refraining from or seeking mental health care included experiencing psychological distress or good psychological well-being, experiences due to gender dysphoria, acceptance of themselves, and experienced lack of support. Suggestions for optimal mental health care integration were better and more provision of (mental) health care and travel distance to mental health care. Qualities of the ideal mental health care professional were having certain character traits such as being accepting and being specialized in TGD. Overall, this research emphasizes the importance of knowledgeability and empathetic and inclusive qualities in mental health care professionals in the treatment of TGD individuals suggesting its importance over mental health care professionals’ gender identity.Show less
Bij het naleven van gedragsdoelen is een vorm van zelfregulatie van belang. Als deze zelfregulatie niet tot stand komt, spreken we van zelfregulatie falen. Hierbij hoort ook het ervaren van een...Show moreBij het naleven van gedragsdoelen is een vorm van zelfregulatie van belang. Als deze zelfregulatie niet tot stand komt, spreken we van zelfregulatie falen. Hierbij hoort ook het ervaren van een setback, een terugval in het naleven van een gedragsdoel. Om de kans op setbacks zo klein mogelijk te maken, moeten we begrijpen hoe individuen reageren op deze setbacks. In deze thesis wordt onderzoek gedaan naar het belang van gedragsdoelen en welke psychologische constructen invloed hebben of worden beïnvloed door het ervaren van een setback. Deze thesis onderzoekt daarnaast het verschil tussen approach-oriented en avoidoriented doelen in relatie tot subjectief succes bij gedragsverandering. Vanuit de literatuur werd verwacht dat doelen met betrekking tot fysieke gezondheid de belangrijkste gedragsdoelen waren. Daarnaast werd als hypothese gesteld dat approach-oriented doelen meer subjectief succes opleveren dan avoid-oriented doelen. Methoden. Met een steekproef van 167 participanten werden verschillende statistische analyses toegepast om antwoord te geven op de drie onderzoeksvragen. De resultaten duiden op een significant onderscheid tussen beide typen doelen, waarbij approach-oriented doelen aanzienlijk hogere gemiddelde scores op subjectief succes vertonen dan avoid-oriented doelen. In de context van de eerste onderzoeksvraag blijkt dat het verhogen of reguleren van wekelijkse sportactiviteiten het meest voorkomende doel is, terwijl het verhogen of reguleren van gezonde voeding het daaropvolgende meest gangbare doel is. De tweede onderzoeksvraag wijst op een algemene positieve perceptie van doelbereiking onder deelnemers, waarbij approach-oriented doelen, zoals het verhogen van gezonde voeding, meer succesvol lijken dan avoid-oriented doelen, zoals het reduceren van alcoholinname. Echter tonen de resultaten aan dat deelnemers die zich richten op het verhogen of reguleren van sportactiviteiten zich over het algemeen niet significant succesvoller voelen dan degenen die zich concentreren op het verhogen of reguleren van gezonde voeding, Conclusie. De bevindingen suggereren dat het streven naar gewenste resultaten een verhoogd gevoel van succes teweegbrengt in vergelijking met het vermijden van ongewenste resultaten. Dit impliceert praktische implicaties voor interventies gericht op gedragsverandering, waarbij een nadruk op approach-oriented doelen een effectieve strategie lijkt te zijn. Echter wijst dit onderzoek op enkele beperkingen, zoals een beperkte steekproefomvang en de mogelijkheid van vertekening door zelfrapportage. Toekomstig onderzoek zou baat hebben bij een representatievere steekproef en longitudinale ontwerpen om een dieper inzicht te verschaffen in deze dynamiek.Show less
Research master thesis | Developmental Psychopathology in Education and Child Studies (research) (MSc)
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Both youth with a substance use disorder (SUD) and youth who have experienced adverse childhood experiences (ACEs) show heightened vulnerability to psychopathology. We aimed to quantify the risk of...Show moreBoth youth with a substance use disorder (SUD) and youth who have experienced adverse childhood experiences (ACEs) show heightened vulnerability to psychopathology. We aimed to quantify the risk of comorbid disorders in SUD youth with ACE-history. Additionally, we aimed to examine relations between ACEs, overall household experience, and general distress. We used cross-sectional YIT-study data from interviews with Dutch youth (aged 16-22) upon SUD treatment entry for cannabis, alcohol, or stimulant use. We measured ACE-types experienced up until 15 years of age, past-year DSM-5 disorders, general distress (DASS-21), and overall household experience rating. Logistic regressions quantified relations between ACE sum score and anxiety, depressive, behavior, and any disorder. Higher ACE sum scores related to increased risks for a(n) anxiety (OR = 1.12, highest odds = 2.84; χ2(1) = 6.71, p < .010; Nagelkerke R2 = 0.2), depressive (OR = 1.21, highest odds = 5.43; χ2(1) = 18.11, p < .001; Nagelkerke R2 = 0.6), behavior (OR = 1.20, highest odds = 5.24; χ2(1) = 17.41, p < .001; Nagelkerke R2 = 0.6), and any (OR = 1.25, highest odds = 7.58; χ2(1) = 17.26, p < .001; Nagelkerke R2 = 0.7) disorder. Exploratory analyses revealed that frequency of parental fighting, being hit/abused, getting belittled, emotional neglect, physical neglect, insufficient household income, long parental sickness, and overall household experience positively related to DASS-21. In a hierarchical regression analysis with all ACEs and overall household experience, only emotional neglect related to DASS-21 (B = 3.68, t(373) = 2.41, p = .017). Overall household experience did not improve the model (F(12) = 3.51, p < .001; R2change < .001). In hierarchical regression analyses containing ACE sum score and overall household experience, overall household experience was not uniquely related to DASS-21 (t = -0.22, p = .824; R2change < .01). In conclusion, ACEs relate to comorbid disorders in SUD youth. Our exploratory research suggests that ACE frequency might influence this relation, while overall household experience does not further explain this relation. Further research should investigate which ACE measures (a.o., type, frequency) strongly relate to SUDs and psychopathology and examine improved treatment options.Show less
Verbal information transmission has been proposed as one of the most influential fear learning pathways in the acquisition of social fears among children. Empirical studies have demonstrated that...Show moreVerbal information transmission has been proposed as one of the most influential fear learning pathways in the acquisition of social fears among children. Empirical studies have demonstrated that the content of parental verbal information regarding social situations plays a crucial role in shaping children’s development of social fear. Specifically, verbal threat (versus safety) information by the parent regarding novel stimuli significantly influenced children’s reported fear of the social scenario. The current study aims to further investigate whether such verbal threat and safety messages affect children's reported fear in social situations. Additionally, the study explores the potential moderating influence of parental social anxiety on this relationship, as evidence suggests that socially anxious parents convey more negative information regarding novel stimuli, thereby amplifying children's fear beliefs. A total of 69 children (mean age = 11.92 years; 38 girls) received standardized threat and safety information regarding a stranger from their primary caregivers. Subsequently, children engaged in three social tasks with each stranger and reported their fear beliefs about the stranger at the end of the social tasks. Results indicate significantly higher fear beliefs among children who received threat information compared to safety information regarding the stranger. However, parental social anxiety did not moderate the effects of negative verbal information on children’s reported fear beliefs. These findings underscore the role of negative verbal information transmission in children's acquisition of social fears while highlighting the complexity of factors within social anxiety that could contribute to the intergenerational transmission of these fears.Show less
Een setback is een tijdelijke terugval bij het streven naar een gedragsdoel. Onderzoek heeft aangetoond dat mensen regelmatig niet optimaal reageren op een terugval. Ondanks veel studies naar self...Show moreEen setback is een tijdelijke terugval bij het streven naar een gedragsdoel. Onderzoek heeft aangetoond dat mensen regelmatig niet optimaal reageren op een terugval. Ondanks veel studies naar self-efficacy en doeloriëntaties bij setbacks, ontbreekt het begrip van hoe deze factoren elkaar beïnvloeden in het specifieke geval van de drie deelconstructen van self-efficacy: taak self-efficacy, onderhoud self-efficacy en herstel self-efficacy. Dit onderzoek onderzocht de invloed van approach- en avoidance-doelen op deze deelconstructen bij mensen die een setback hebben ervaren. Met behulp van een online vragenlijst over gedragsdoelen op het gebied van voeding, alcohol, nicotine, fysieke activiteit, schermtijd, gelduitgave en tijd voor hobby’s of ontspanning, zijn de participanten gevraagd naar hun gedragsdoelen en de setbacks die zij hebben ervaren. De respondenten (N=152) waren tussen de 17-30 jaar en streefden minstens een van deze gedragsdoelen na. Drie afzonderlijke t-testen vergeleken de deelconstructen van self-efficacy tussen approach- en avoidance-doelen. Resultaten toonden aan dat deelnemers met een approach-doel een hogere taak en onderhoud self-efficacy hadden na een setback dan degenen met een avoidance-doel. Herstel self-efficacy werd niet beïnvloed door doeloriëntatie en had een lagere correlatie met taak en onderhoud self-efficacy. De relatie tussen doeloriëntatie en de deelconstructen van self-efficacy bleek daarmee niet eenduidig. Mogelijke verklaringen voor deze bevindingen kunnen liggen bij individuele verschillen en andere psychologische mechanismen die niet zijn onderzocht in deze studie. Deze bevindingen kunnen worden gebruikt voor het ontwikkelen van effectievere interventies. Daarnaast benadrukken deze bevindingen het belang van verder onderzoek naar de afzonderlijke deelconstructen van self-efficacy en hun relatie bij setbacks.Show less
Decisions made at child protection sittings significantly impact the lives of children and their families. Therefore, it is crucial to investigate the factors influencing these decisions. Previous...Show moreDecisions made at child protection sittings significantly impact the lives of children and their families. Therefore, it is crucial to investigate the factors influencing these decisions. Previous research indicates that these decisions are not always made correctly and exhibit substantial variability. This study utilizes the Decision Making Ecology Model to analyse the influence of risk assessment tools and work experience on these decisions. Data were collected through a questionnaire and a case file study. The analyses show that the use of risk assessment tools has a significant impact on the decisions made. Work experience did not have a significant direct influence, but the use of risk assessment tools indirectly affected work experience, which in turn had a small effect on the final decisions.Show less
