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Effects of odor stimuli on self-face perception depending on sex, BMI, and self-esteem: an event-related potential study

Title
Effects of odor stimuli on self-face perception depending on sex, BMI, and self-esteem: an event-related potential study
Alternative Title
냄새 자극이 성별, BMI 및 자존감에 따른 자기 얼굴 인식에 미치는 영향: 사건 유발 전위 연구
Author(s)
Sun Ae Moon
DGIST Authors
Sun Ae MoonCheil MoonChang-Hun Lee
Advisor
문제일
Co-Advisor(s)
Chang-Hun Lee
Issued Date
2021
Awarded Date
2021/02
Type
Thesis
Subject
Odor, Self, Face, ERP, EEG, Sex, BMI, Self-esteem, 자기 얼굴, 냄새, 뇌신호, 성별, 체질량지수, 자존감
Abstract
Our face is the most powerful tool for socializing. It conveys a great deal of information about ourselves. For this reason, we regularly check our own reflections in the mirror in everyday life. Previous studies have revealed that context and sensory stimuli alter face perception and evaluation. However, it is unclear how external sensory stimuli change neural processing of self-face perception and evaluation. This study investigated how odor alters self-face perception and evaluation using the mean amplitude of event-related potentials (ERP) and post-survey ratings. Thirty participants showed differences in the mean ERP amplitudes in the frontal region of the left hemisphere after the onset of self-face perception when exposed to a pleasant odor (lavender) or an unpleasant odor (isovaleric acid). The responses also differed depending on sex, body mass index (BMI), and self-esteem. The self-face perception and evaluation response were more sensitive to odors in females than in males. Participants with high BMI or high self-esteem showed little difference between the presented odors. Interestingly, the neural modulation patterns in response to both odors were isovaleric acid–like in the high-BMI group but lavender-like in the high-self-esteem group. These results indicate that accumulated feelings toward the self or sensitivity to the odor stimuli may produce different self-face perceptions and evaluations. The results will help us understand the modulation of neural activity patterns by odors during self-perception and evaluation. Furthermore, they demonstrate distinct responses to odor stimuli according to individual features such as sex, BMI, and self-esteem. This study could be used to develop neuro-cosmetics or enhance social well-being.
Table Of Contents
List of Contents
ABSTRACT i
List of Contents ii
List of Tables v
List of Figures vi
Ⅰ. Introduction - 1 -
1.1 Overview of this study - 1 -
1.2 Theoretical background of this study - 6 -
1.2.1 Importance of making good social relationships - 6 -
1.2.2 Central roles of self-face perception processing in social relationships - 6 -
1.2.3 Distinct neural patterns: self-face vs. non-self-face - 8 -
1.2.4 Odor stimuli - 11 -
1.2.5 Sex, BMI, and self-esteem - 13 -
Ⅱ. Materials & Methods - 17 -
2.1 Participants - 17 -
2.2 Stimulus - 20 -
2.3 Experimental scheme - 22 -
2.4 Questionnaires - 25 -
2.5 EEG data analysis - 31 -
2.6 Statistical analysis - 40 -
Ⅲ. Characterization of self-face perception and evaluation depending on sex, BMI, and self-esteem - 41 -
3.1. Significance & Hypothesis - 41 -
3.2 Results - 42 -
3.2.1 Self-face evaluation ratings - 42 -
3.2.2 Neural processing of self-face - 44 -
3.2.3 Effects of sex, BMI, and self-esteem on self-face processing - 46 -
3.3. Discussion - 51 -
Ⅳ. Effects of odor stimuli on self-face perception and evaluation - 53 -
4.1 Significance & Hypothesis - 53 -
4.2 Results - 54 -
4.2.1 Odor characteristic ratings - 54 -
4.2.2 Self-face evaluation ratings after odor priming - 59 -
4.2.3 Neural processing of self-face after odor priming - 61 -
4.2.4 Correlation between odor perception and self-face evaluation - 65 -
4.3 Discussion - 67 -
Ⅴ. Effects of odor stimuli on self-face perception and evaluation depending on sex, BMI, and self-esteem - 70 -
5.1 Significance & Hypothesis - 70 -
5.2 Results - 71 -
5.2.1. Sex difference - 71 -
5.2.2.BMI - 77 -
5.2.3 Self-esteem - 81 -
5.2.4 BMI & Self-esteem - 85 -
5.3 Discussion - 88 -
VI Conclusion - 90 -
Reference - 92 -
요 약 문 - 104 -
URI
http://dgist.dcollection.net/common/orgView/200000362206

http://hdl.handle.net/20.500.11750/16657
DOI
10.22677/thesis.200000362206
Degree
Doctor
Department
Brain and Cognitive Sciences
Publisher
DGIST
Related Researcher
  • 이창훈 Lee, Chang-Hun
  • Research Interests Structure-Function relationship of cytoskeletal proteins and membrane proteins; Structure-based design of biomolecules and drugs; Development of drug delivery system in skin
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Department of Brain Sciences Theses Ph.D.

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