Michael Rietzler

Investigating the Effects of Eco-Friendly Service Options on Rebound Behavior in Ride-Hailing

Eco-friendly service options (EFSOs) aim to reduce personal carbon emissions, yet their eco-friendly framing may permit increased consumption, weakening their intended impact. Such rebound effects remain underexamined in HCI, including how common eco-feedback approaches shape them. We investigate this in an online wit…

Mind Games! Exploring the Impact of Dark Patterns in Mixed Reality Scenarios

Mixed Reality (MR) integrates virtual objects with the real world, offering potential but raising concerns about misuse through dark patterns. This study explored the effects of four dark patterns, adapted from prior research, and applied to MR across three targets: places, products, and people. In a two-factorial wit…

Light My Way. Developing and Exploring a Multimodal Interface to Assist People With Visual Impairments to Exit Highly Automated Vehicles

The introduction of Highly Automated Vehicles (HAVs) has the potential to increase the independence of blind and visually impaired people (BVIPs). However, ensuring safety and situation awareness when exiting these vehicles in unfamiliar environments remains challenging. To address this, we conducted an interactive wo…

PlantPal: Leveraging Precision Agriculture Robots to Facilitate Remote Engagement in Urban Gardening

Urban gardening is widely recognized for its numerous health and environmental benefits. However, the lack of suitable garden spaces, demanding daily schedules and limited gardening expertise present major roadblocks for citizens looking to engage in urban gardening. While prior research has explored smart home soluti…

When Do We Feel Present in a Virtual Reality? Towards Sensitivity and User Acceptance of Presence Questionnaires

Presence is an important and widely used metric to measure the quality of virtual reality (VR) applications. Given the multifaceted and subjective nature of presence, the most common measures for presence are questionnaires. But there is little research on their validity regarding specific presence dimensions and thei…

Scrolling in the Deep: Analysing Contextual Influences on Intervention Effectiveness during Infinite Scrolling on Social Media

Infinite scrolling on social media platforms is designed to encourage prolonged engagement, leading users to spend more time than desired, which can provoke negative emotions. Interventions to mitigate infinite scrolling have shown initial success, yet users become desensitized due to the lack of contextual relevanc…

Eco Is Just Marketing: Unraveling Everyday Barriers to the Adoption of Energy-Saving Features in Major Home Appliances

The Effect of Spatial Audio on Curvature Gains in VR Redirected Walking

Redirected walking (RDW) is a technique that allows users to navigate larger physical spaces in virtual reality (VR) environments by manipulating the users' view of the virtual world. In this study, we investigate the effect of adding spatial audio elements to curvature gains in RDW aiming to increase the perceptual t…

Come Fly With Me - Investigating the Effects of Path Visualizations in Automated Urban Air Mobility

"Automated Urban Air Mobility will enhance passenger transportation in metropolitan areas in the near future. Potential passengers, however, have little knowledge about this mobility form. Therefore, there could be concerns about safety and low trust. As trajectories are essential information to address these concerns…

Investigating the Effects of Individual Spatial Abilities on Virtual Reality Object Manipulation

Object manipulation in 3D space, meaning translating, rotating, and scaling, is ubiquitous in virtual reality (VR), and several interaction techniques have been developed in the past to optimize the task performance and usability. However, preliminary research indicates that individual spatial abilities also have an i…