서브메뉴
검색
The Mechanisms Involved in Distractor Suppression During Attentional Processing
The Mechanisms Involved in Distractor Suppression During Attentional Processing
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151147
- ISBN
- 9798382629186
- DDC
- 153
- 서명/저자
- The Mechanisms Involved in Distractor Suppression During Attentional Processing
- 발행사항
- [Sl] : The University of North Carolina at Chapel Hill, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 145 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Hopfinger, Joseph B.
- 학위논문주기
- Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2024.
- 초록/해제
- 요약Attention can be directed to certain aspects of our environment through the enhancement of certain features such as size, shape, and color. This enhancement of attention allows us to concentrate on relevant specific stimuli in our visual world. However, it is insufficient to have an attention mechanism that only enhances features; this would imply that one would be constantly captured by every relevant feature in our visual world. Therefore, recent theories suggest that there is an attentional mechanism that suppresses the capture of task-irrelevant but highly salient stimuli in a scene. While attentional capture has been highly studied, the mechanisms of attentional suppression are less clear. Recently, research suggests that people can suppress stimuli that might otherwise capture attention. Behavioral studies have used a capture-probe paradigm and found that when a distractor is present in a display, there are quicker and more accurate reaction times to a target. Additionally, during successful suppression, the PD ERP component (a marker of suppression) is elicited. Finally, research has also found that suppression of a distractor can be learned over multiple blocks. These results have led to a recent theory suggesting that there are three possible mechanisms of suppression, which include first, second, and global-level suppression (Gaspelin & Luck, 2018). However, previous evidence suggests that only first-level suppression is a plausible mechanism of suppression. Only recently has evidence directly suggested that higher levels of suppression, second and global-order, can occur (Ma & Abrams, 2023b). While, overall, previous research has shown that people can suppress stimuli that would otherwise capture visual attention, it is still not clear how the visual system determines which items are to be suppressed. Therefore, this project aimed to explore suppression mechanisms and how they contribute to successful attentional processing. The following series of experiments explored the differences in the suppression levels of distractors, the time course and mechanisms involved in second-level suppression, and if and how distractor suppression is learned. For the first time, these experiments show through both behavioral and neural data that second-level suppression is a potential mechanism for ignoring salient but irrelevant items in the visual world. First, this experiment supports that during second-order suppression, typical behavioral indices of successful suppression are present in both search and probe trials. This study also found that higher levels of suppression are substantially different from one another, with second and global-order suppression effects differing. Global order suppression showed indicators of attentional capture, which contradicts global salience suppression models. This distinction between higher levels of suppression has not yet been seen in the literature. This study also paired the second-order suppression task with EEG for the first time and found a PD component during the color singleton present trials, providing novel evidence that supports second-order suppression models. Finally, this study found that the ability to suppress second-level features is immediate and remains when rejecting novel distractors. This suggests that second-level shows significant suppression benefit effects immediately and throughout the blocks, whereas first-level suppression does not. Overall, these three experiments provide novel support for the second-order salience suppression model and are a first step to resolving debates surrounding the three models of attentional suppression.
- 일반주제명
- Cognitive psychology
- 일반주제명
- Neurosciences
- 일반주제명
- Clinical psychology
- 키워드
- Attention
- 키워드
- Suppression
- 기타저자
- The University of North Carolina at Chapel Hill Psychology
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017160997
■00520250211151147
■006m o d
■007cr#unu||||||||
■020 ▼a9798382629186
■035 ▼a(MiAaPQ)AAI31235113
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a153
■1001 ▼aMorgan, Hannah Lori.
■24510▼aThe Mechanisms Involved in Distractor Suppression During Attentional Processing
■260 ▼a[Sl]▼bThe University of North Carolina at Chapel Hill▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a145 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Hopfinger, Joseph B.
■5021 ▼aThesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2024.
■520 ▼aAttention can be directed to certain aspects of our environment through the enhancement of certain features such as size, shape, and color. This enhancement of attention allows us to concentrate on relevant specific stimuli in our visual world. However, it is insufficient to have an attention mechanism that only enhances features; this would imply that one would be constantly captured by every relevant feature in our visual world. Therefore, recent theories suggest that there is an attentional mechanism that suppresses the capture of task-irrelevant but highly salient stimuli in a scene. While attentional capture has been highly studied, the mechanisms of attentional suppression are less clear. Recently, research suggests that people can suppress stimuli that might otherwise capture attention. Behavioral studies have used a capture-probe paradigm and found that when a distractor is present in a display, there are quicker and more accurate reaction times to a target. Additionally, during successful suppression, the PD ERP component (a marker of suppression) is elicited. Finally, research has also found that suppression of a distractor can be learned over multiple blocks. These results have led to a recent theory suggesting that there are three possible mechanisms of suppression, which include first, second, and global-level suppression (Gaspelin & Luck, 2018). However, previous evidence suggests that only first-level suppression is a plausible mechanism of suppression. Only recently has evidence directly suggested that higher levels of suppression, second and global-order, can occur (Ma & Abrams, 2023b). While, overall, previous research has shown that people can suppress stimuli that would otherwise capture visual attention, it is still not clear how the visual system determines which items are to be suppressed. Therefore, this project aimed to explore suppression mechanisms and how they contribute to successful attentional processing. The following series of experiments explored the differences in the suppression levels of distractors, the time course and mechanisms involved in second-level suppression, and if and how distractor suppression is learned. For the first time, these experiments show through both behavioral and neural data that second-level suppression is a potential mechanism for ignoring salient but irrelevant items in the visual world. First, this experiment supports that during second-order suppression, typical behavioral indices of successful suppression are present in both search and probe trials. This study also found that higher levels of suppression are substantially different from one another, with second and global-order suppression effects differing. Global order suppression showed indicators of attentional capture, which contradicts global salience suppression models. This distinction between higher levels of suppression has not yet been seen in the literature. This study also paired the second-order suppression task with EEG for the first time and found a PD component during the color singleton present trials, providing novel evidence that supports second-order suppression models. Finally, this study found that the ability to suppress second-level features is immediate and remains when rejecting novel distractors. This suggests that second-level shows significant suppression benefit effects immediately and throughout the blocks, whereas first-level suppression does not. Overall, these three experiments provide novel support for the second-order salience suppression model and are a first step to resolving debates surrounding the three models of attentional suppression.
■590 ▼aSchool code: 0153.
■650 4▼aCognitive psychology
■650 4▼aNeurosciences
■650 4▼aClinical psychology
■653 ▼aAttention
■653 ▼aEvent-related potential
■653 ▼aDistractor positivity
■653 ▼aSuppression
■653 ▼aElectroencephalography
■690 ▼a0633
■690 ▼a0317
■690 ▼a0622
■71020▼aThe University of North Carolina at Chapel Hill▼bPsychology.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0153
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160997▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
