Laws regulate behaviour. However, human beings do not always obey the law. This makes it important to identify how law enforcement can stimulate compliance. This thesis investigates multiple gaps... Show moreLaws regulate behaviour. However, human beings do not always obey the law. This makes it important to identify how law enforcement can stimulate compliance. This thesis investigates multiple gaps in the literature on instrumental and normative pathways to compliance and counters some of the limitations in previous research. It contains three empirical studies that answer the following questions. Do citizens update their perceived sanction risk in response to changes in police activity? Does police behaviour that signals higher quality of treatment or decision-making lead to higher perceived procedural justice? Howdo instrumental and normative motivations translate into greater compliance with traffic laws?All results are based on field research conducted with the help of the Dutch National Police between January and August 2017. During this period data was collected at routine traffic control check-points for mopeds. The combination of data gathered through surveys, structured social observations and an experimental manipulation contributes to a better and more precise understanding of pathways to compliance. Show less
Ample research has shown that more household chaos is related to lower parenting quality, but it is yet unknown whether this is a causal relation. This dissertation focuses on two research... Show moreAmple research has shown that more household chaos is related to lower parenting quality, but it is yet unknown whether this is a causal relation. This dissertation focuses on two research questions. The first is whether household chaos has a causal effect on parenting. The second is whether the effect of household chaos on parenting is stronger for parents with certain characteristics, such as high sensory-processing sensitivity (SPS), low self-regulation, and more impulsivity. Two experimental studies were conducted in which household chaos was manipulated. The results show that household chaos affects both positive and negative parenting, but only in demanding parenting situations. Moderation by impulsivity was not found and moderation by SPS and by self-regulation was inconsistent. Regarding SPS, this may exacerbate the effect of household chaos on parenting in case of extreme differences between or high levels of household chaos. Regarding self-regulation, parents with low self-regulation may not have enough self-regulation capacities to simultaneously lower their levels of household chaos and refrain from harsh discipline. These results form a promising vantagepoint for further research, which could eventually lead to prevention and intervention programs to improve parenting by reducing household chaos. Show less
The relationship between the media and politics is close and often characterized by tensions. Politicians often are accused of being led by short-lived media cycles in their actions, thereby... Show moreThe relationship between the media and politics is close and often characterized by tensions. Politicians often are accused of being led by short-lived media cycles in their actions, thereby losing sight of broader societal interests. At the same time, the media are accused of primarily seeking out conflicts and sensational news which is detrimental to both politics and society. This dissertation provides an empirical test of these claims based on unique data from experimental studies with elected politicians and political journalists in Switzerland and the Netherlands. What media reports trigger politicians to take parliamentary action? And how and when do messages from political parties get picked up by journalists? The answers to these two questions presented in the first part of the book provide the basis for a unique direct comparison of the selection mechanisms politicians and journalists apply in the final part. Show less
Why can vigilantes count on public support? Why do citizens in certain cases oppose the formal prosecution and punishment of vigilantes? Are such reactions an indication of lacking confidence in... Show moreWhy can vigilantes count on public support? Why do citizens in certain cases oppose the formal prosecution and punishment of vigilantes? Are such reactions an indication of lacking confidence in the criminal justice system? Or do situational aspects perhaps also play a role? The goal of this dissertation is to explain public support for vigilantism. In two studies, respondents were presented with a fictional case about vigilantism and answered related questions. The findings of both studies show that support for vigilantism cannot be interpreted automatically as a sign that confidence in the criminal justice system is lacking: situational characteristics have an independent influence on support. The results also reveal that support for vigilantism is a complex concept. People are not simply for or against vigilantism; responses to vigilantism are more nuanced. People can for instance feel little empathy for the victim of vigilantism, but at the same time express a desire for punishment of the vigilante. Additionally, a higher level of confidence in the courts and criminal justice system led to less support for vigilantism, while confidence in police did not play a role. Lastly, general support for vigilantism was an important predictor of support for a specific case. Show less
As the de facto industry standard for software modeling, the Unified Modeling Language (UML) is used widely across various IT domains. UML__s wide acceptance is partly because the language offers... Show moreAs the de facto industry standard for software modeling, the Unified Modeling Language (UML) is used widely across various IT domains. UML__s wide acceptance is partly because the language offers flexibility and freedom in modeling software systems: 1) UML provides an extensive set of modeling notations that can be used to model various concepts; 2) UML can be used both in a casual and formal manners. In the context of model-driven software development, the degree of freedom in which UML is used raises an important issue related to model quality. Different styles and rigors in using UML affect the quality of the resulting models. It is then logical to think that the level of quality of the UML model may affect the quality of the resulting software. This thesis reports on a series of empirical studies performed to address a pivotal question concerning the benefits of UML modeling in software development, particularly from a quality perspective. The results of these empirical studies show that the use of UML provides benefits in terms of increased quality and productivity in software development. The availability of UML models also allows early prediction of defects in software systems. Such prediction is potentially useful for identifying and fixing defects early during software development, and for prioritizing testing. Show less
