This study reveals a gap in current User Experience (UX) assessment methods: the lack of consideration for ethical dimensions, particularly in addressing "dark patterns" in interface design. By adapting the User Experience Questionnaire (UEQ) and incorporating additional items to capture responses to unethical designs, the research examines user evaluations of social media dark patterns. Initial findings suggest that while conventional UX scores may not effectively identify unethical design, subscale measures show promise in this regard. Additionally, users demonstrate an ability to discern interfaces with addictive and coercive properties, highlighting potential pathways for enhancing UX assessment practices.

This master's thesis delves into the realm of dark patterns within the scope of EU consumer law. Examining the effectiveness of the Unfair Commercial Practices Directive (UCPD), it questions whether the current legal framework adequately safeguards consumers against these deceptive design tactics. Through a thorough analysis of cognitive biases and legal provisions, the research proposes legislative amendments to better address the manipulation caused by dark patterns. Ultimately, it advocates for a revision of the average consumer benchmark to align more closely with the realities of consumer behavior influenced by these tactics.