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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
Influence of Egocentric and Visual Scene Biases on Saccadic Eye Movements

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103526
ISBN  
9798288866418
DDC  
616
저자명  
Reeves, Stephanie Marin.
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  
Horizontal saccade bias
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  
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MARC

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■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.

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