This study investigates how perceptions of status and warmth of help-seekers affect the willingness of help-givers to offer help as well as the type of help they offer (autonomyoriented help...Show moreThis study investigates how perceptions of status and warmth of help-seekers affect the willingness of help-givers to offer help as well as the type of help they offer (autonomyoriented help/dependency-oriented help). Data were collected using a scenario approach (N = 205) in an experimental study, which simulated a debt assistance setting in a municipality. The variables Status (low/high) and Warmth (low/high) were investigated in a betweensubjects design. Participants completed an online survey on perceived warmth, status, and locus of attribution of a help-seeker and indicated their willingness to help as well as the type of help. It was hypothesized that warmth perceptions of help-seekers would influence the likeliness to help, that status perceptions would influence the locus of attributions as well as the type of help and that the effect between status and type of help would be mediated by the locus of attributions. The study did not find support for these hypotheses. However, exploratory analyses revealed a significant positive effect of both Status and Warmth on perceived competence, and significant correlations between locus of attributions and likeliness to help, autonomy and dependency-oriented help, and emotions (admiration/envy/pity) and type of help. These findings underline the role of stereotypes and biases in influencing helping behavior, emphasizing the need for further investigations of helping mechanisms.Show less
While amnestic Mild Cognitive Impairment (aMCI) and Alzheimer’s disease (AD) are primarily defined by cognitive deficits, studies have demonstrated that motor impairments can precede cognitive...Show moreWhile amnestic Mild Cognitive Impairment (aMCI) and Alzheimer’s disease (AD) are primarily defined by cognitive deficits, studies have demonstrated that motor impairments can precede cognitive symptoms by several years in these conditions. However, it is uncertain if the ability to learn sequences of movements is also impaired in this population. Therefore, this study investigated whether aMCI and AD affect motor sequence learning abilities, and how such abilities are related to AD biomarkers. The sample included 33 individuals with aMCI, 28 with AD, and 52 healthy controls (HCs). All groups completed a motor task consisting of performing a sequence of button presses, alternated with random blocks. Reaction time, coefficient of variation, and learning rates were obtained from the task. Participants also completed a series of cognitive tests to assess memory, visuospatial abilities, processing speed, language, and attention. Additionally, the following biomarkers for AD were assessed: amyloid beta via PET imaging, hippocampal volume via structural MRI, and number of e4 alleles via APOE genotyping. ANOVAs showed that AD participants had longer and more variable reaction times, followed by aMCI individuals, and with HCs having the shorter and more consistent reaction times. No significant differences in sequence learning rate were observed between groups. Exploratory analyses revealed that aMCI/AD had significantly slower initial learning rate than HCs. Linear regressions showed associations of slower reaction times with smaller hippocampal volume, and of higher coefficients with higher amyloid deposition. Poisson regressions revealed no significant correlations between motor sequence learning and APOEe4 allele count. Akaike Information Criterion (AIC) results indicated that combining cognitive test with motor measures improves the prediction of AD biomarkers. Overall, AD and aMCI individuals showed impairments in general motor performance but relatively preserved motor sequence learning abilities, with some deficits in initial rate of learning. Moreover, statistical model comparison suggested that adding motor sequence learning measures to neuropsychological assessment tools enhanced the prediction of AD biomarkers. As such, future studies should explore the value of integrating motor sequence learning measures in the assessment and tracking of AD/aMCI.Show less
Master thesis | Cultural Anthropology and Development Sociology (MSc)
open access
This thesis explores the relationship between humans and non-humans within a sea turtle conservation organization in Costa Rica’s Osa Peninsula. Through eleven weeks of in-depth visual ethnographic...Show moreThis thesis explores the relationship between humans and non-humans within a sea turtle conservation organization in Costa Rica’s Osa Peninsula. Through eleven weeks of in-depth visual ethnographic fieldwork, I investigate the influence these human/non-human relationships have on scientific knowledge production. The output of this research consists of an ethnographic film ‘The Turtle Team’ and this article. This research underscores the necessity of adopting transdisciplinary methodologies in which non-humans are integrated, which is crucial in the era of the Anthropocene. It provides a nuanced understanding of how human/non-human relationships shape the production of scientific knowledge in this team of conservationists and emphasizes the interwovenness of humans and non-humans. This research contributes to the existing literature on the Anthropocene and the nature-culture debate and I argue that the interwovenness of humans and non-humans should be discussed more within scientific research, especially in conservation biology.Show less
Bachelor thesis | Cultural Anthropology and Development Sociology (BSc)
closed access
Doven en slechthorenden worden door de maatschappij op een bepaalde manier geclassificeerd en dit heeft gevolgen voor de mogelijkheden die zij hebben in de maatschappij. Deze scriptie gaat in op de...Show moreDoven en slechthorenden worden door de maatschappij op een bepaalde manier geclassificeerd en dit heeft gevolgen voor de mogelijkheden die zij hebben in de maatschappij. Deze scriptie gaat in op de manier waarop doven en slechthorenden worden gezien. Hierbij zal vanuit verschillende perspectieven worden gekeken wat het inhoudt om doof te zijn. De perspectieven van de horende maatschappij zullen tegenover die van de doven en slechthorenden worden gezet. Het perspectief van de horende maatschappij is op dit moment dominant. Om te analyseren waarom dit het geval is zal worden gekeken hoe de horende maatschappij het zintuig horen waardeert. Vervolgens zal worden gekeken hoe doven en slechthorenden in het dagelijks leven functioneren zonder het zintuig horen. Zij bewijzen dat het zintuig horen niet nodig is om goed te kunnen functioneren in de maatschappij. Op dit moment leven doven en slechthorenden in een wereld die niet altijd toegankelijk is. Er worden wel veranderingen gedaan om de maatschappij toegankelijker te maken, maar zijn dit wel de veranderingen die doven en slechthorenden zelf graag zien? Er is sprake van een spanningsveld tussen doven en slechthorenden en de horende maatschappij en dit spanningsveld zal in deze scriptie worden geanalyseerd.Show less
Dutch law mandates that every secondary special education school develops post-secondary transition plans for their students. Currently, there are no established guidelines for creating these...Show moreDutch law mandates that every secondary special education school develops post-secondary transition plans for their students. Currently, there are no established guidelines for creating these transition plans. This study aimed to investigate two potential factors that could be considered, specifically for students with autism: IQ and social-emotional functioning. To examine the relationship between IQ, social-emotional functioning, and transition plans, this research assessed the correlation between IQ and transition plans, the correlation between social-emotional functioning and transition plans, and whether IQ or social-emotional functioning more strongly predicted transition plans. Recruitment resulted in a sample of n= 14 participants: with n= 13 boys and n= 1 girl. N= 7 was assigned the transition profile Labor and n= 7 was assigned the transition profile Post-Secondary Education, none of the participants were assigned the transition profile Daytime Occupation. This study utilized the developmental prospect plans of the students. Upon data analysis, it was found that there was no significant correlation between IQ and transition planning (p = .428), no significant correlation between social-emotional functioning and transition planning (p = .855), and neither IQ nor social-emotional functioning emerged as a stronger predictor for transition planning. The limitations of the current research were a small sample size, the variability of entries in the developmental prospect plans and the multidimensionality of the variables IQ and social-emotional functioning. Future research should be done to investigate the replicability of the current findings within a bigger sample and the potential of alternative variables that may be associated. Teachers working with students with autism may need additional training to understand the complexities of transition planning beyond the intellectual or social-emotional functioning. Considering these findings, it is concluded that neither IQ nor social-emotional functioning should be used as sole criteria for transition plans for autistic students in secondary special education.Show less
This current study investigated the relationship between level of pain, expectancies, and avoidance in individuals with chronic low back pain. Research showed that individually expectancies and...Show moreThis current study investigated the relationship between level of pain, expectancies, and avoidance in individuals with chronic low back pain. Research showed that individually expectancies and avoidance behaviour influence pain experience. However, there seems to be little research into the combined influence. Seeing that research also showed that pinpointing a cause for the chronic low back pain is difficult, this study aimed to give insight into interacting factors that influence chronic low back pain. To gather data participants (N=18) filled in a questionnaire five times a day for two weeks. This provided insight into their levels of pain in the morning and the evening, if they expected to experience pain and if they were more likely to avoid movements, they expected to be painful. These statements were answered with answering scales, ranging from 0 (not at all) to 6 (extremely), given how likely that statement was for the participant. A mediation analysis inspecting possible relations between the level of pain and expectancies, the level of pain and avoidance, and the level of pain, expectancies and avoidance yielded no significant relations. Therefore, it could not be concluded that avoidance and/or expectancy are influencing the level of pain in the evening when compared to the level of pain in the morning. There were two significant findings, the impact of level of pain in the morning on expectancies and the impact of expectancies on avoidance. These findings are in line with what was found in existing literature and give incitement for further research on this topic. Another incitement for further research is the small sample used in this current study. The implication for the scientific field therefore is to perform this study on a bigger sample. Another consideration for further research would be to try and use a more diverse sample in both age and gender, this to make a more representative sample to draw conclusions for the general population. This could also lead to more substantial implications for the clinical field since this study did not have significant results.Show less
Onderzoek naar de classificatieaccuratesse van Alzheimer is belangrijk om de ziekte in de toekomst beter te kunnen behandelen. In deze scriptie werden twee structurele MRI-maten geëvalueerd: grijze...Show moreOnderzoek naar de classificatieaccuratesse van Alzheimer is belangrijk om de ziekte in de toekomst beter te kunnen behandelen. In deze scriptie werden twee structurele MRI-maten geëvalueerd: grijze stofdichtheid (48 predictoren) en subcorticale volumes (14 predictoren). Deze scriptie onderzocht wat de toegevoegde waarde van subcorticale volumes bovenop grijze stofdichtheid is. Hierbij werd verwacht dat I) grijze stofdichtheid accurater was voor de classificatie van Alzheimer dan subcorticale volumes, maar dat II) subcorticale volumes nog wel iets zouden toevoegen aan grijze stofdichtheid. Om dit te onderzoeken, is data gebruikt van 249 participanten afkomstig uit twee verschillende studies. 76 participanten hadden de diagnose Alzheimer en de overige 173 participanten waren cognitief gezonde ouderen. Er zijn drie modellen gebruikt: een model van grijze stofdichtheid (48 predictoren), een model van subcorticale volumes (14 predictoren) en een combinatiemodel van grijze stofdichtheid en subcorticale volumes (62 predictoren). Voor alle modellen is een logistische regressieanalyse met geneste kruisvalidatie uitgevoerd. Het model van grijze stofdichtheid had een AUC-waarde van 0.897 en een MGA-waarde van 0.822. Het model van subcorticale volumes had een AUC-waarde van 0.807 en een MGA-waarde van 0.769. Het gecombineerde model had een AUCwaarde van 0.897 en een MGA-waarde van 0.841. De eerste hypothese werd bevestigd, aangezien grijze stofdichtheid belangrijker was voor de classificatieaccuratesse dan subcorticale volumes. De tweede hypothese kon niet worden bevestigd, aangezien subcorticale volumes weinig tot niets lijken toe te voegen aan grijze stofdichtheid voor de classificatieaccuratesse van Alzheimer. Deze kennis kan gebruikt worden om toekomstige classificatiemodellen van Alzheimer te verbeteren.Show less
Due to the COVID-19 pandemic, many activities and platforms have shifted to the virtual realm, including rituals and ceremonies. When it comes to psychedelic rituals, there are several important...Show moreDue to the COVID-19 pandemic, many activities and platforms have shifted to the virtual realm, including rituals and ceremonies. When it comes to psychedelic rituals, there are several important factors to take into account, such as the setting, dosage, and type of substance consumed. This paper examines the effects of virtual ceremonies on psychedelic experiences. The study utilized an online self-report questionnaire that was sent 1-2 days after the ceremony conducted by retreat company Spinoza. The gathered data were analyzed using thematic qualitative analysis. The categorization and themes were agreed upon by two independent researchers. The themes presented relate to the improvement of mental health and physical comfort along with insightful personal journeys. Further evaluation of the research suggested that the findings provide a general idea about the effects of digital format on the psychedelic experience. It has been found that with digital platforms on psychedelic experiences, individuals can experience clarity of unsolved issues, improved self-regulation, as well as improved emotional and mental states.Show less
Inaction inertia occurs when one is less likely to take an attractive opportunity, after refusing an even more attractive opportunity. In their experiment, van Putten and colleagues (2007) tried to...Show moreInaction inertia occurs when one is less likely to take an attractive opportunity, after refusing an even more attractive opportunity. In their experiment, van Putten and colleagues (2007) tried to decouple the inaction inertia effect by using ambiguous information. Their results yielded that ambiguous information did in fact decouple. However, the authors came to these conclusions by using optional stopping and p-hacking. This influenced the reliability of the results, so we decided to replicate this study, for good research practices and because it can give us valuable insight into how decoupling works when given an attractive offer. We made use of the replication recipe of Brandt and colleagues (2014) to conduct the replication.Show less
