# Enhancing User Experience in Virtual Museums: Impact of Finger Vibrotactile Feedback
## 3 Methodology
### Virtual Object and Interaction Design  
The virtual environments were enhanced with a carefully curated assortment of 28 virtual objects, representing a broad spectrum of material textures, including wooden, ceramic, porcelain, and stone artifacts. These objects were meticulously selected for their distinct tactile characteristics--from the intricate grain patterns of wood to the sleek smoothness of porcelain--to challenge and showcase the glove's capacity for nuanced haptic feedback. High-quality models from SketchFab were adopted to ensure detailed textures and visual realism. Each artifact was tagged with specific identifiers to facilitate accurate feedback and interaction during tasks. As shown in Figure 3a four virtual boards, each designated for one material type (wood, porcelain, ceramic, and stone) were developed as interactive platforms within the Unity environment. These boards served as repositories where users would match each virtual object according to its material classification. Initially, the boards displayed a neutral yellow color, which dynamically changed based on the user's interaction: red for incorrect matches and white for correct ones as shown in Figure 3b. This color-coding system provided instant visual feedback, aiding users in learning and adapting during the task. Figure 2: Design of custom 3D-printed fingertip holders for ERM motors. To enhance user understanding of task performance, two informational boards were created. One board featured instructions and task details in English, and it was equipped with visual aids to improve comprehension. Figure 3c shows a companion board that presented similar content, ensuring accessibility for a broader audience. Both boards included video samples demonstrating interactions with virtual objects to provide clear visual guidance. 1. A comprehensive script governed the task's operational logic and ensured accurate detection and feedback provision. This script included several key functionalities:
2. User-interaction detection: Utilized advanced collider technology to detect when a user interacted with a virtual object or material board, fine-tuned to recognize specific gestures and touches for high interaction accuracy. 3. Logic matching: Employed a sophisticated algorithm to assess the match between the selected object and the targeted board, facilitating an automated and immediate assessment of the user's selection accuracy. 4. Feedback mechanism: Adjusted visual cues (board colors) and triggered specific haptic feedback intensity through the glove upon each interaction. The intensities varied to correspond to the virtual object's material properties, simulating a realistic tactile sensation. Figure 3: (**a**) Material categorization boards; (**b**) correct and incorrect match indication on the material board; (**c**) informational board in Korean and English. Performance tracking: Embedded a detailed tracking system to log each participant's task completion times and error rates, crucial for the quantitative analysis of the glove's impact on user performance and interaction efficiency. Building on the hardware and software enhancements, the experiment's design included a set of visually similar artifacts for each setting, making them challenging to distinguish by sight alone. This modification highlighted the effectiveness of the vibrotactile glove in enhancing user interaction and performance within the virtual museum setting, demonstrating the potential of tactile feedback in compensating for visual ambiguities. The experiment was meticulously crafted to evaluate the vibrotactile glove through a comprehensive setup, starting with a user training session, followed by three distinct testing settings shown in Figure 4. Each phase was designed to assess how tactile feedback influences user interaction and experience within a virtual museum. Key metrics, such as the accuracy of artifact placement and task completion time, were measured to evaluate the effectiveness of the vibrotactile feedback in enhancing user performance and experience.