Effects of Trauma and Discrimination on the Social Regulation of Threat-related Vigilance and Arousal
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 45
- 试验地点
- 1
- 主要终点
- Vigilance Related Eye Movements - Number of Eye Fixations
研究概览
简要总结
This study will examine the effects of social support on threat vigilance and arousal using eye tracking. We will also test the moderating effects of trauma and discrimination history.
详细描述
Both interpersonal trauma (IPT) and ethno-racial discrimination amplify risk for hyper-arousal symptoms of posttraumatic stress disorder (PTSD), but the mechanism of this effect is unclear. Prior research suggests that social support plays an important role in regulating emotional responses, a process called social emotion regulation. This study will test whether a history of IPT and/or ethno-racial discrimination influence the social regulation of arousal and vigilance. Social regulation will be tested by contrasting responses under conditions with and without social support.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 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
- •In a stable romantic relationship for 6 months or more
- •Normal vision or corrected-to-normal vision
- •Fluent in English
排除标准
- •If vision is corrected-to-normal, needs to use hard contact lenses, bifocal contact lenses, or glasses
- •Experienced a traumatic event within the past 4 weeks
研究组 & 干预措施
Social support from a romantic partner
Participants will hold the hand of their romantic partner
干预措施: social support (Behavioral)
Social support from a stranger
Participants will hold the hand of a stranger
干预措施: social support (Behavioral)
No social support
Participants will hold a stress ball
结局指标
主要结局
Vigilance Related Eye Movements - Number of Eye Fixations
时间窗: Collected from minute 15 to minute 45 of study participation, approximately
Participants will view 15 pictures of natural environmental scenes for 10 seconds per image. We will use an eye tracker to examine the number of eye fixations per scene. A greater number of fixations during the 10 second presentation of a scene would indicate greater vigilance.
Vigilance Related Eye Movements - Visual Scanning
时间窗: Collected from minute 15 to minute 45 of study participation, approximately
Participants will view 15 pictures of natural environmental scenes for 10 seconds per image. We will use an eye tracker to examine the proportion of the scene that they look at (fixate on) out of approximately 80 possible sectors. A greater proportion of the scene they fixate on would indicate greater vigilance.
Threat-Related Physiological Arousal - Pupil Dilation
时间窗: Collected from minute 45 to minute 75 of study participation, approximately
Participants will view a series of visual cues (either an 'X' or an 'O') where an 'X' signals a possible (20% probability) aversive auditory stimulus (human scream). We will examine pupil dilation during the task in order to measure arousal in response to uncertain threat. We will calculate average pupil dilation during the wait period after threat cues (X) and after safety cues (O). We will subtract average pupil dilation after safety cues from threat cues to create an index of threat-related arousal. Greater pupil dilation (for threat minus safety cues) would indicate greater threat-related arousal.
次要结局
未报告次要终点
研究者
Cynthia Lancaster
Associate Professor Psychology/Associate Director, Clinical Training
University of Nevada, Reno