The Effect of Stimulus Size and Position on the Task Performance of an Eye Mouse: Comparing Blink and Dwell Methods in a Click Task

ABSTRACT

Eye mouse devices are operated by ocular movements, which have proven to be useful for disabled people who find eye control to be the easiest input method. However, there are few studies comparing the two typical click methods for eye mouse (blink and dwell) in identical experimental conditions for general object selection operations. Especially, investigation on task performance (effectiveness and efficiency) of selecting objects is not sufficient. Therefore, this study aims to investigate the relationships between task performance of selecting a stimulus and independent variables with comparing the two different click methods. To investigate the relationship, movement distance, eye input method, stimulus position, and stimulus size were considered as independent variables. Results of the blink method revealed a higher efficiency than the dwell method, particularly as the stimulus size increased. Also, both efficiency and effectiveness of stimuli in upper parts of screen was higher than for those in lower ones. Additionally, efficiency was remarkably higher when the stimulus size increased. The results of this study may be used as guidelines to design interfaces using an eye mouse device. Especially, it can be applied to various conditions of selecting an object in the working environment using the eye mouse.

Funding

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1D1A3B03034321).

Additional information

Funding

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1D1A3B03034321).

Notes on contributors

Minjee Kim

Minjee Kim is a PhD candidate at the Interdisciplinary Program in Cognitive Science at Seoul National University, South Korea. She received MDes in industrial design from Cardiff Metropolitan University, UK. Her research interests are Human–Computer Interaction and User-Centered Design.

Daehwan Jin

Daehwan Jin is a PhD candidate at the Interdisciplinary Program in Cognitive Science at Seoul National University, South Korea. He received MS in Interdisciplinary Program in Cognitive Science at Seoul National University, South Korea. His research interests are Usability/UX, Universal Design, and Assistive Technology.

Ilsun Rhiu

Ilsun Rhiu is currently an assistant professor in the Division of Global Management Engineering at the Hoseo University, South Korea. He received a BS, MS and PhD in Industrial Engineering from Seoul National University, South Korea. His research areas are Human–Computer Interaction, User-Centered Design, and User Research Method.

Myung Hwan Yun

Myung Hwan Yun is a Professor in the Department of Industrial Engineering at Seoul National University, South Korea. He received a BS and MS in industrial engineering from Seoul National University and a PhD in industrial and manufacturing engineering from Penn State University, USA. His research interests include Human Factors and Affective Product Design.