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Influence of Egocentric and Visual Scene Biases on Saccadic Eye Movements
Influence of Egocentric and Visual Scene Biases on Saccadic Eye Movements
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103526
- ISBN
- 9798288866418
- DDC
- 616
- 서명/저자
- Influence of Egocentric and Visual Scene Biases on Saccadic Eye Movements
- 발행사항
- [Sl] : University of California, Berkeley, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 68 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Otero-Millan, Jorge.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Berkeley, 2025.
- 초록/해제
- 요약Humans make eye movements to shift their gaze and stabilize visual input on the retina to see clearly and complete daily tasks. Saccades, rapid gaze shifting eye movements that occur 2-3 times per second, are generated by the brain to precisely place objects of interest onto the fovea. While saccades occur in all directions, not all directions are equally likely: cardinal saccades are more prevalent than oblique saccades, and horizontal saccades are more prevalent than vertical saccades. Despite repeated mention of the horizontal saccade bias, as it is colloquially termed, few experiments have systematically examined the factors that influence the horizontal saccade bias. This dissertation includes four projects that share a common goal of understanding how the horizontal saccade bias is influenced by specific viewing conditions to further shed light on how the brain combines sensory information from both egocentric and scene-based mechanisms to generate motor commands. Chapter 1 provides a brief overview of saccadic eye movements including current theories as to why the horizontal saccade bias exists. Chapter 2 investigates the role of head orientation in the horizontal saccade bias. Our experiments indicate that head orientation influences the horizontal saccade bias during viewing of both a radially abstract fractal image and a natural scene. Chapter 3 investigates the role of saccade size in determining saccade direction using both free viewing and fixation tasks. We find that small saccades, regardless of task, are executed egocentrically in alignment with head/retinal orientation, while larger saccades are executed allocentrically in alignment with image orientation. Chapter 4 examines the image-based features that drive the strength of the horizontal bias using two publicly available datasets. Results indicate that orientation biases in saliency content best predict changes in the horizontal saccade bias. Chapter 5 puts forth a model of saccade targeting that uses egocentric biases combined with allocentric saliency maps. We find that our model produces saccades that reorient in response to image tilt, though not at the expected gain.Taken together, this work reveals that previously unexamined factors - such as head orientation, saccade size, and image content - systematically shape saccadic eye movement patterns. This work advances our understanding of how the brain integrates egocentric and allocentric information to guide ocular motor behavior with potential implications for clinical and industrial needs.
- 일반주제명
- Neurosciences
- 일반주제명
- Experimental psychology
- 일반주제명
- Biophysics
- 일반주제명
- Cognitive psychology
- 키워드
- Head orientation
- 키워드
- Saccade size
- 키워드
- Image content
- 기타저자
- University of California, Berkeley Vision Science
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798288866418
■035 ▼a(MiAaPQ)AAI32039283
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616
■1001 ▼aReeves, Stephanie Marin.
■24510▼aInfluence of Egocentric and Visual Scene Biases on Saccadic Eye Movements
■260 ▼a[Sl]▼bUniversity of California, Berkeley▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a68 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Otero-Millan, Jorge.
■5021 ▼aThesis (Ph.D.)--University of California, Berkeley, 2025.
■520 ▼aHumans make eye movements to shift their gaze and stabilize visual input on the retina to see clearly and complete daily tasks. Saccades, rapid gaze shifting eye movements that occur 2-3 times per second, are generated by the brain to precisely place objects of interest onto the fovea. While saccades occur in all directions, not all directions are equally likely: cardinal saccades are more prevalent than oblique saccades, and horizontal saccades are more prevalent than vertical saccades. Despite repeated mention of the horizontal saccade bias, as it is colloquially termed, few experiments have systematically examined the factors that influence the horizontal saccade bias. This dissertation includes four projects that share a common goal of understanding how the horizontal saccade bias is influenced by specific viewing conditions to further shed light on how the brain combines sensory information from both egocentric and scene-based mechanisms to generate motor commands. Chapter 1 provides a brief overview of saccadic eye movements including current theories as to why the horizontal saccade bias exists. Chapter 2 investigates the role of head orientation in the horizontal saccade bias. Our experiments indicate that head orientation influences the horizontal saccade bias during viewing of both a radially abstract fractal image and a natural scene. Chapter 3 investigates the role of saccade size in determining saccade direction using both free viewing and fixation tasks. We find that small saccades, regardless of task, are executed egocentrically in alignment with head/retinal orientation, while larger saccades are executed allocentrically in alignment with image orientation. Chapter 4 examines the image-based features that drive the strength of the horizontal bias using two publicly available datasets. Results indicate that orientation biases in saliency content best predict changes in the horizontal saccade bias. Chapter 5 puts forth a model of saccade targeting that uses egocentric biases combined with allocentric saliency maps. We find that our model produces saccades that reorient in response to image tilt, though not at the expected gain.Taken together, this work reveals that previously unexamined factors - such as head orientation, saccade size, and image content - systematically shape saccadic eye movement patterns. This work advances our understanding of how the brain integrates egocentric and allocentric information to guide ocular motor behavior with potential implications for clinical and industrial needs.
■590 ▼aSchool code: 0028.
■650 4▼aNeurosciences
■650 4▼aExperimental psychology
■650 4▼aBiophysics
■650 4▼aCognitive psychology
■653 ▼aHorizontal saccade bias
■653 ▼aHead orientation
■653 ▼aSaccade size
■653 ▼aImage content
■690 ▼a0317
■690 ▼a0786
■690 ▼a0633
■690 ▼a0623
■71020▼aUniversity of California, Berkeley▼bVision Science.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0028
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357535▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


