The rapid improvement of hardware and internet speed in modern societies has contributed to more vibrant websites with lots of motion, which often has a correlation to a better user experience, but not always. Scroll-hijacked websites are one of the more controversial techniques, a questionable action where one modifies the default scroll behaviour, which affects the preconceived notions about how to navigate a website. But the effect can be beneficial when one wants to draw attention to crucial call-to-action (CTA) elements.  This thesis resulted in creating a scroll-hijacked prototype based on an already deployed event website with lots of vital CTA elements. The developed prototype was then evaluated against the old website through A/B testing with SUS- and NASA-TLX-surveys. These tests and evaluations were performed by a user study with 44 participants. During the thesis, it was found that there are areas of use where it can be favourable to use scroll-hijacking to increase attention for CTA elements, and thereby increase the conversion, but it requires a thoughtful application.

Denna studie undersöker användarpreferenser och utmaningar kopplade till horisontella gränssnitt som använder vertikala skrollningsmekanismer på webbplatser. I det snabbt föränderliga digitala landskapet ökar förekomsten av horisontella gränssnitt, särskilt på webbplatser som använder horisontella layouter samtidigt som de behåller traditionella vertikala skrollningsmekanismer. Studien syftar till att analysera användarupplevelser vid sådana gränssnitt med fokus på användarattityder mot vertikal skrollning på horisontellt orienterade webbplatser samt dess inverkan på användbarhet och användarupplevelse.Forskningen innefattade utvecklingen av en prototypwebbplats med ett horisontellt gränssnitt och genomförandet av användartester. Deltagarna interagerade med prototypen genom att använda Tänka Högt-protokoll och System Usability Scale (SUS) vilket gav insikter i deltagarnas uppfattningar och erfarenheter. Resultaten visade blandade attityder mot horisontell skrollning, påverkade av faktorer som mentala modeller, feedbackmekanismer och personliga preferenser. Studien belyser vikten av att anpassa gränssnittsdesignen efter användarförväntningar och feedbackens roll i att förbättra användarupplevelsen. / This study investigates user preferences and challenges associated with horizontal interfaces that use vertical scrolling mechanisms on websites. In the rapidly changing digital landscape, the prevalence of horizontal interfaces is increasing, especially on websites that use horizontal layouts while retaining traditional vertical scrolling mechanisms. The study aims to analyze user experiences with such interfaces, focusing on user attitudes towards vertical scrolling on horizontally oriented websites and its impact on usability and user experience.The research included developing a prototype website with a horizontal interface and conducting user tests. Participants interacted with the prototype using the "Think Aloud" protocol and the System Usability Scale (SUS), providing insights into their perceptions and experiences. The results showed mixed attitudes towards horizontal scrolling, influenced by factors such as mental models, feedback mechanisms, and personal preferences. The study highlights the importance of adapting interface design to user expectations and the role of feedback in enhancing user experience.