Contributions of Attentional and Inhibitory Functioning to Saccadic Decisions
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 225
- 试验地点
- 1
- 主要终点
- First fixation duration during visual search
研究概览
简要总结
The goal of this study is to investigate the finding that there are large individual differences in how participants move their eyes during active visual search. For example, some individuals tend to fixate, that is point their eyes steadily at a single location, for longer than other individuals before moving to another location. This experiment will use behavioral tasks to measure an individual's attentional and inhibitory functioning, and then see how each of these contributes to between-participant variability in eye movement behavior during visual search.
详细描述
To accomplish the goal of understanding the source of individual variability in eye movement patterns, each participant will complete three separate tasks. The first task will require participants to find a target and eye movements will be measured to assess individual differences in fixation duration and other types of eye movement behavior. A second task will evaluate attentional functioning over the visual field by requiring participants to detect briefly-presented targets using their peripheral vision. Finally, a third task will assess inhibitory functioning by having participants attempt to stop eye movements after they have been programmed.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •18-65 years old
排除标准
- •Self-reported history of neurological illness
- •Uncorrected vision problems
研究组 & 干预措施
Study Group Contour Search
This study examines eye movement behavior using eye-tracking technology. Healthy participants perform three different tasks, including a visual search task, a stop-signal task, and a useful field of view task. Behavioral performance and eye movements are recorded for all tasks.
干预措施: Contour Search Task (Other)
Study Group Contour Search
This study examines eye movement behavior using eye-tracking technology. Healthy participants perform three different tasks, including a visual search task, a stop-signal task, and a useful field of view task. Behavioral performance and eye movements are recorded for all tasks.
干预措施: Stop signal Task (Behavioral)
Study Group Contour Search
This study examines eye movement behavior using eye-tracking technology. Healthy participants perform three different tasks, including a visual search task, a stop-signal task, and a useful field of view task. Behavioral performance and eye movements are recorded for all tasks.
干预措施: Useful field of View (Behavioral)
Study Group Attentional Capture
This study examines eye movement behavior using eye-tracking technology. Healthy participants perform three different tasks, including a visual search task emphasizing distraction, a stop-signal task, and a useful field of view task. Behavioral performance and eye movements are recorded for all tasks.
干预措施: Stop signal Task (Behavioral)
Study Group Attentional Capture
This study examines eye movement behavior using eye-tracking technology. Healthy participants perform three different tasks, including a visual search task emphasizing distraction, a stop-signal task, and a useful field of view task. Behavioral performance and eye movements are recorded for all tasks.
干预措施: Useful field of View (Behavioral)
Study Group Attentional Capture
This study examines eye movement behavior using eye-tracking technology. Healthy participants perform three different tasks, including a visual search task emphasizing distraction, a stop-signal task, and a useful field of view task. Behavioral performance and eye movements are recorded for all tasks.
干预措施: Attentional capture search task (Behavioral)
结局指标
主要结局
First fixation duration during visual search
时间窗: During visual search task
This measure is the average first fixation duration during the visual search task. Possible scores are a minimum of 50 ms with an undeterminable positive number of ms as a maximum. This measure indicates the duration of processing before the first eye movement decision.
Fixation count during visual search
时间窗: During visual search task
This measure is the count the average number of eye movements participants made per trial during the visual search task. Possible scores range from a minimum of 0 to approximately 40 eye movements, given the time available. This measure indicates the amount of active exploration of the display during search.
Stop signal reaction time
时间窗: During inhibitory task
Stop signal reaction time is a quantitative estimate of how long participants take to successfully inhibit a planned eye movement. Possible scores range from a minimum of 0 ms to a maximum of about 600 ms. Low scores indicate strong inhibitory ability and high scores indicate weak inhibitory ability.
Useful field of view thresholding
时间窗: During attention task
Performance in a thresholding task indicates participants ability to detect a briefly presented target among distractors with 80% accuracy. Contrast of the displays varies until performance meets achieved level. Possible scores range from 0 to 100% contrast. Lower contrast indicates better information accrual, while higher contrast indicates worse.
Useful field of view dual task performance
时间窗: During attention task
Performance in a dual task indicates participants ability to spread attention across the visual field. Possible scores range from 0 to 100% accuracy. Higher performance indicates better information accrual, while lower performance indicates worse.
Oculomotor capture by salient distractor
时间窗: During visual search task
in the attentional capture search task, a measure of how often participants look at the salient yet irrelevant distractor will be calculated.
次要结局
- Average fixation duration during visual search(During the visual search task)