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Navigating a Dynamic World: How Attention Shapes the Content and Structure of Episodic Memory
Navigating a Dynamic World: How Attention Shapes the Content and Structure of Episodic Mem...
Navigating a Dynamic World: How Attention Shapes the Content and Structure of Episodic Memory

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자료유형  
 학위논문 서양
최종처리일시  
20260202105151
ISBN  
9798293831821
DDC  
153
저자명  
Huang, Ringo H.
서명/저자  
Navigating a Dynamic World: How Attention Shapes the Content and Structure of Episodic Memory
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
150 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Clewett, David.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약At every moment of our waking lives, our senses are confronted with an endless stream of stimuli. Yet only a fraction of the inputs, those that we truly care about, reach conscious awareness. Attention performs this remarkable feat of selective filtering, prioritizing the processing of information that most aligns with our interests. These interests are also ever-shifting, not just in response to changes in external conditions, but also to natural internal fluctuations driven by our motivations, desires, and expectations. This dynamic interaction between attention, our inner state, and the external world shapes how we experience and remember our lives.Chapter 1 provides an overview of attention and arousal theories, beginning with classic capacity models and how they (1) explain key empirical findings like the arousal-performance curve(s) and (2) resolve conflicting accounts such as the rigidity-lability paradox. I then examine neurobiological theories that subserve these cognitive models, focusing on the noradrenergic circuitry underlying arousal's distributed influences and the neuromodulatory interactions that tune and sustain neuronal activity.Chapter 2 investigates the attentional boost effect (ABE), in which detecting a goal-relevant target in one task enhances memory for concurrent, task-irrelevant information. Although seemingly at odds with dual-task interference predictions, ABE may offer a clue into the subtle influences of our dynamic attentional system on episodic memory. Using a category-specific design and Signal Detection Theory, we determined that the boost in recognition memory reflects a shift in response criterion rather than an improvement in memory sensitivity. This suggests that the boosted memory representations are more conceptual than perceptual. Moreover, pupil-linked arousal responses predicted worse recognition memory under most conditions, but critically, this relationship was disrupted for trials that were accompanied by a novel target. Together, these results suggest that ABE may arise from a disinhibitory mechanism that biases memory towards gist-based traces. This leads us to propose that Fuzzy Trace Theory may provide a useful complementary framework that extends the explanatory value of existing ABE models.As originally formulated, ABE suggests that attention promotes the binding of peripheral information at event boundaries, or contextual shifts in our episodic experience that demark the end of one event and the start of the next. Using an event segmentation paradigm, participants judged objects while responding to auditory tones that periodically switched ears and pitch, signaling a change in response hand and a new perceptual-goal context. We examined pupil variability, an index of attentional stability, during 5-item windows that spanned across contexts or remained within the same context. We found that lower variability predicted better temporal order memory and stronger item recognition during the same 5-item window, suggesting that attentional stability supported both temporal structure and item encoding. At the neural level, pattern similarity in the object-selective lateral occipital cortex (LOC) predicted recognition for items studied within the same context, but not across boundaries. Mediation analyses indicated that the LOC-recognition link was partially explained by pupil variability, highlighting attentional stability's role in stabilizing perceptual representations thereby supporting successful memory encoding.Chapter 4 explores how naturalistic emotional fluctuations shape the temporal organization of memory. To induce shifts in emotional context, participants viewed sequences of everyday objects while generating narratives and listening to instrumental music composed with three distinct emotional segments. We introduced a novel measure of temporal structure, the Time's Arrow Task (TAT), in which participants placed previously studied items on a timeline to indicate when they believed each had occurred. Participants also provided continuous ratings of valence and arousal in response to the music. At the list level, greater variability in arousal predicted poorer temporal memory organization, as reflected by increased Mean Absolute Displacement (MAD) on the TAT. Local analyses revealed that MAD was significantly higher when comparing 5-item windows that spanned emotional boundaries compared to windows within the same musical context. Transitions across emotional contexts were associated with greater fluctuations in arousal and impaired temporal structure, with boundary-related increases in arousal variability further predicting elevated MAD. Together, these findings highlight the nuanced influence of arousal fluctuations on the temporal structure of episodic memory, emphasizing the critical role of emotional dynamics in shaping how events are temporally organized.In summary, across three empirical studies, this dissertation reveals how the attention-arousal system shapes not only the fidelity of what we remember but also the temporal structure in which memories are organized.
일반주제명  
Cognitive psychology
일반주제명  
Psychology
일반주제명  
Physiological psychology
키워드  
Arousal
키워드  
Attention
키워드  
Fuzzy
키워드  
Memory
키워드  
Neuroimaging
키워드  
Pupillometry
기타저자  
University of California, Los Angeles Psychology 0780
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
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MARC

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■035    ▼a(MiAaPQ)AAI32242318
■040    ▼aMiAaPQ▼cMiAaPQ
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■1001  ▼aHuang,  Ringo  H.
■24510▼aNavigating  a  Dynamic  World:  How  Attention  Shapes  the  Content  and  Structure  of  Episodic  Memory
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a150  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Clewett,  David.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aAt  every  moment  of  our  waking  lives,  our  senses  are  confronted  with  an  endless  stream  of  stimuli.  Yet  only  a  fraction  of  the  inputs,  those  that  we  truly  care  about,  reach  conscious  awareness.  Attention  performs  this  remarkable  feat  of  selective  filtering,  prioritizing  the  processing  of  information  that  most  aligns  with  our  interests.  These  interests  are  also  ever-shifting,  not  just  in  response  to  changes  in  external  conditions,  but  also  to  natural  internal  fluctuations  driven  by  our  motivations,  desires,  and  expectations.  This  dynamic  interaction  between  attention,  our  inner  state,  and  the  external  world  shapes  how  we  experience  and  remember  our  lives.Chapter  1  provides  an  overview  of  attention  and  arousal  theories,  beginning  with  classic  capacity  models  and  how  they  (1)  explain  key  empirical  findings  like  the  arousal-performance  curve(s)  and  (2)  resolve  conflicting  accounts  such  as  the  rigidity-lability  paradox.  I  then  examine  neurobiological  theories  that  subserve  these  cognitive  models,  focusing  on  the  noradrenergic  circuitry  underlying  arousal's  distributed  influences  and  the  neuromodulatory  interactions  that  tune  and  sustain  neuronal  activity.Chapter  2  investigates  the  attentional  boost  effect  (ABE),  in  which  detecting  a  goal-relevant  target  in  one  task  enhances  memory  for  concurrent,  task-irrelevant  information.  Although  seemingly  at  odds  with  dual-task  interference  predictions,  ABE  may  offer  a  clue  into  the  subtle  influences  of  our  dynamic  attentional  system  on  episodic  memory.  Using  a  category-specific  design  and  Signal  Detection  Theory,  we  determined  that  the  boost  in  recognition  memory  reflects  a  shift  in  response  criterion  rather  than  an  improvement  in  memory  sensitivity.  This  suggests  that  the  boosted  memory  representations  are  more  conceptual  than  perceptual.  Moreover,  pupil-linked  arousal  responses  predicted  worse  recognition  memory  under  most  conditions,  but  critically,  this  relationship  was  disrupted  for  trials  that  were  accompanied  by  a  novel  target.  Together,  these  results  suggest  that  ABE  may  arise  from  a  disinhibitory  mechanism  that  biases  memory  towards  gist-based  traces.  This  leads  us  to  propose  that  Fuzzy  Trace  Theory  may  provide  a  useful  complementary  framework  that  extends  the  explanatory  value  of  existing  ABE  models.As  originally  formulated,  ABE  suggests  that  attention  promotes  the  binding  of  peripheral  information  at  event  boundaries,  or  contextual  shifts  in  our  episodic  experience  that  demark  the  end  of  one  event  and  the  start  of  the  next.  Using  an  event  segmentation  paradigm,  participants  judged  objects  while  responding  to  auditory  tones  that  periodically  switched  ears  and  pitch,  signaling  a  change  in  response  hand  and  a  new  perceptual-goal  context.  We  examined  pupil  variability,  an  index  of  attentional  stability,  during  5-item  windows  that  spanned  across  contexts  or  remained  within  the  same  context.  We  found  that  lower  variability  predicted  better  temporal  order  memory  and  stronger  item  recognition  during  the  same  5-item  window,  suggesting  that  attentional  stability  supported  both  temporal  structure  and  item  encoding.  At  the  neural  level,  pattern  similarity  in  the  object-selective  lateral  occipital  cortex  (LOC)  predicted  recognition  for  items  studied  within  the  same  context,  but  not  across  boundaries.  Mediation  analyses  indicated  that  the  LOC-recognition  link  was  partially  explained  by  pupil  variability,  highlighting  attentional  stability's  role  in  stabilizing  perceptual  representations  thereby  supporting  successful  memory  encoding.Chapter  4  explores  how  naturalistic  emotional  fluctuations  shape  the  temporal  organization  of  memory.  To  induce  shifts  in  emotional  context,  participants  viewed  sequences  of  everyday  objects  while  generating  narratives  and  listening  to  instrumental  music  composed  with  three  distinct  emotional  segments.  We  introduced  a  novel  measure  of  temporal  structure,  the  Time's  Arrow  Task  (TAT),  in  which  participants  placed  previously  studied  items  on  a  timeline  to  indicate  when  they  believed  each  had  occurred.  Participants  also  provided  continuous  ratings  of  valence  and  arousal  in  response  to  the  music.  At  the  list  level,  greater  variability  in  arousal  predicted  poorer  temporal  memory  organization,  as  reflected  by  increased  Mean  Absolute  Displacement  (MAD)  on  the  TAT.  Local  analyses  revealed  that  MAD  was  significantly  higher  when  comparing  5-item  windows  that  spanned  emotional  boundaries  compared  to  windows  within  the  same  musical  context.  Transitions  across  emotional  contexts  were  associated  with  greater  fluctuations  in  arousal  and  impaired  temporal  structure,  with  boundary-related  increases  in  arousal  variability  further  predicting  elevated  MAD.  Together,  these  findings  highlight  the  nuanced  influence  of  arousal  fluctuations  on  the  temporal  structure  of  episodic  memory,  emphasizing  the  critical  role  of  emotional  dynamics  in  shaping  how  events  are  temporally  organized.In  summary,  across  three  empirical  studies,  this  dissertation  reveals  how  the  attention-arousal  system  shapes  not  only  the  fidelity  of  what  we  remember  but  also  the  temporal  structure  in  which  memories  are  organized.
■590    ▼aSchool  code:  0031.
■650  4▼aCognitive  psychology
■650  4▼aPsychology
■650  4▼aPhysiological  psychology
■653    ▼aArousal
■653    ▼aAttention
■653    ▼aFuzzy
■653    ▼aMemory
■653    ▼aNeuroimaging
■653    ▼aPupillometry
■690    ▼a0633
■690    ▼a0621
■690    ▼a0989
■71020▼aUniversity  of  California,  Los  Angeles▼bPsychology  0780.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359645▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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