Augmenting on-screen instructions with micro-projected guides: when it works, and when it fails

We present a study that evaluates the effectiveness of augmenting on-screen instructions with micro-projection for manual task guidance unlike prior work, which replaced screen instructions with alternative modalities (e.g., headmounted displays). In our study, 30 participants completed 10 trials each of 11 manual tasks chosen to represent a set of common task-components (e.g., cutting, folding) found in many everyday activities such as crafts, cooking, and hobby electronics. Fifteen participants received only onscreen instructions, and 15 received both on-screen and micro-projected instructions. In contrast to prior work, which focused only on whole tasks, our study examines the benefit of augmenting common task instructions. The augmented instructions improved participants' performance overall; however, we show that in certain cases when projected guides and physical objects visually interfered, projected elements caused increased errors. Our results demonstrate that examining ...

• Type: Conference
• Year: 2010
• Where: HUC
• Authors: Stephanie Rosenthal, Shaun K. Kane, Jacob O. Wobbrock, Daniel Avrahami
• Keywords: HUC 2010, Human Computer Interaction, Instruction, Manual Tasks, Task Guidance