Investigating cognitive and emotional factors that trigger pupil delation in human computer interaction

Download

index.pdf

Date

2018

Author

Uyanık Civek, Ceren

Metadata

Show full item record

Item Usage Stats

223
views

241
downloads

Human-computer interaction can be enhanced if emotional arousal of the user can be predicted. Measurement of pupil dilation is an effective indicator to achieve a successive classification for categorizing the psychological state of a user. In this study, rather than trying to identify several psychological states, we focused on the identification of stress. There exist several factors that shift the state of a computer user from relaxation to stress. In this study, we mainly focused on the cognitive factors that cause stress by increasing the difficulty level of a task. We also evaluated the effect of color on emotional responses. We hypothesized that assigning more difficult tasks and looking at a colored image produce higher pupil dilation signals than the signals in a neutral state. In order to evaluate the effectiveness of these factors, we conducted experiments including two phases by using TOBII T120 eye-tracker system. In the first phase, a baseline was constructed by showing neutral IAPS images to record measurements during neutral emotion. In the second phase, some modifications on stimuli were made to increase cognitive load. Pupil measurements collected during these experiments were used to train supervised classifiers for categorizing stressful versus neutral states of the computer users. Both collective and individual subject-based analyses were performed. Better classification results are obtained for individual subject-based classification.

Subject Keywords

Cognition., Emotions., Pupil (Eye)., Eye tracking., Human-computer interaction.

URI

http://etd.lib.metu.edu.tr/upload/12622319/index.pdf
https://hdl.handle.net/11511/27491

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Group eye tracking Deniz, Ozan; Acartürk, Cengiz; Department of Cognitive Sciences (2016) Social interaction relies on information obtained from the eyes to a large extent. However, most of the current eye movement research apply experiments where participants are recorded individually in separate rooms. Those experiments help explaining and model human visual system, individual saccade behavior and fixations under certain conditions. But they lack of explaining the social role of the eye movements. In this study, we design and develop a tool for analyzing the role of eye movements in social com...
Investigation of classroom management skills by using eye-tracking technology Çoşkun, Atakan; Çağıltay, Kürşat; Department of Computer Education and Instructional Technology (2019) This study investigates how a wearable eye tracker can be employed to assess and improve the visual attention of the faculty members in a higher education institution. Two experienced faculty members took part in the study. Both of them have been lecturing for more than ten years at the university, so they are experienced teachers. A wearable eye tracker was employed to assess and improve the participants’ visual attention in relation to classroom management skills. Besides, eye-tracking data were supported...
The Effect of intranasal oxytocin on pupil dilation during trustworthiness evaluation and facial expression recognition tasks Saraçaydın, Fatma Gülhan; Gökçay, Didem; Department of Cognitive Sciences (2015) Our ability to recognize facial expressions and emotions can be modulated by both external and internal factors. One of these internal factors is the neuropeptide “oxytocin”. Many studies have highlighted the involvement of oxytocin in recognition of facial expressions and approach-related trusting behaviors. In the current study, we investigated the effects of oxytocin on recognition accuracy and trustworthiness judgements using facial expressions. We used a subset of expressions and images from the Karoli...
Examining Cognitive Creativity as an Individual Difference in Second Language Acquisition Pıpes, Ashleıgh Carter(2017-12-31) This study examines cognitive creativity as an individual difference and its role in processes and outcomes of second language acquisition. The study explores relationships between participants’ creativity, as measured by the Torrance Test of Creative Thinking, and their course grades, narrative structure use, and communication strategy use.
RESPONSE BIAS SHIFT FOR POSITIVE WORDS IN OLDER ADULTS IN A SURPRISE RECOGNITION MEMORY TASK: AN INCIDENTAL ENCODING STUDY KAYNAK, HANDE; Gökçay, Didem (2017-01-01) Introduction: Although the advantages of positive words on memory enhancement have been documented, the specific effects of the two prominent emotional dimensions (valence and arousal) under incidental encoding require further investigation. The objective is to study memory accuracy and response bias for positive/negative and highly/medium arousing words in a surprise old/new recognition memory paradigm under incidental encoding.

Citation Formats

C. Uyanık Civek, “Investigating cognitive and emotional factors that trigger pupil delation in human computer interaction,” M.S. - Master of Science, Middle East Technical University, 2018.