1. Multi-Tag Physical User Interfaces for Mobile Devices Mobile Devices + Physical “Tag” – RFID/NFC Tag – Image Single Tag Usage – Fetch product information (CueCat?) – Link to Web Site (advertising) – Ticketing

2. Multi-Tag Physical User Interfaces for Mobile Devices Multi-Tag – Combine multiple options No need to permutate – Perform more complicated actions than link or UID Implement part of interface on physical surface Direct Navigation Restaurant Menu Example – Select from multiple objects Compensate for limitations of device – Small screen size One issue: Physical surface is static

3. Spatial Audio Interfaces Idea: Use spatial audio to facilitate processing multiple audio streams at once Experiment: Have user try to listen to a podcast while navigating a hierarchical audio menu

4. Spatial Audio Interfaces Test 1: Pause news story while navigating menu Test 2: Have both play concurrently Test 3: When user is navigating menu, “minimize” podcast by moving it right and making it quieter Test 4: Concurrently, but podcast is always “minimized”

5. Spatial Audio Interfaces (Results) Unsurprisingly, most people didn’t like to listen to the tracks concurrently Of concurrent options, spatial preferred to non-spatial Tasks took longer with concurrent, accuracy on questions about podcasts dropped – Small sample size, not much difference in outcomes between three concurrent methods – Possibly smaller hit for spatial options, particularly for question accuracy