在识别记忆和视觉检测测试中,广泛的前对对面fMRI活动在很大程度上受到标准放置的变化的影响,而不是区别性,在识别记忆和视觉检测测试中受到影响
Evan Layher1, Tyler Santander1, Puneeth Chakravarthula2
1Department of Psychological and Brain Sciences, University of California, Santa Barbara, USA.
NeuroImage
|August 5, 2023
概括
记忆任务中的前端对象活动与决策标准有关,而不仅仅是记忆强度. 调整决策标准,而不是项目难度,在识别和检测过程中显著影响大脑活动.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
背景情况:
- 在识别记忆测试中,广泛的前侧双侧活动是常见的.
- 相互矛盾的理论将这种活动归因于记忆力证据或决策过程.
- 信号检测理论认为,识别涉及超过决策标准的记忆强度.
研究的目的:
- 调查记忆强度和决策标准在前对对活动中的作用.
- 使用fMRI区分与记忆证据相关的活动与决策过程.
- 检查操纵决策标准如何影响记忆和检测任务中的大脑活动.
主要方法:
- 使用fMRI扫描来监测大脑活动.
- 区分能力 (记忆力) 和决策标准都被操纵.
- 参与者完成了识别记忆和视觉检测任务.
主要成果:
- 改变决策标准 (保守派与自由派) 在两个任务中显著调节了前端对象活动.
- 操纵歧视性对前线对象活动的影响很小.
- 识别记忆任务显示出比视觉检测任务更大的前端对象激活幅度和范围.
结论:
- 目标与非目标对比的前线对象活动在很大程度上是由响应偏差驱动的,受决策标准的影响.
- 增加的活动可能反映出抑制前性反应,根据标准设置而有所不同.
- 面对对象活动的特定领域方面存在,与标准维护有关.
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