长期非外部强化的偏好变化的机制:在纵向功能性MRI研究中,功能连接性的变化
Alon Itzkovitch1, Shiran Oren1,2, Sidhant Chopra3,4
1School of Neurobiology, Biochemistry & Biophysics, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.
概括
没有外部奖励,行为变化更具可持续性. 非外部增强的暗示方法训练 (CAT) 导致持久的偏好变化和独特的大脑连接模式,与基于激励的训练不同.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 行为科学 行为科学
背景情况:
- 行为改变干预通常依赖于外部的强化.
- 线索方法训练 (CAT) 通过刺激关联和运动反应而改变偏好,而无需外部奖励.
- 以前的研究表明,CAT的行为影响可以持续数月.
研究的目的:
- 研究由非外部增强与激励增强的CAT引起的偏好变化的神经机制和长期维持.
- 为了在一年内比较中性暗示和激励暗示训练组之间的行为表现和功能连接 (FC).
主要方法:
- 在107名参与者中,采用了修改后的暗示方法训练 (CAT) 范式.
- 参与者被分配到中立提示或激励提示组 (货币奖励协会).
- 行为表现和休息状态功能磁共振成像 (fMRI) 功能连接 (FC) 在一年的五个时间点进行了评估.
主要成果:
- 非外部增强 (中性-cue) 参与者保持行为变化长达六个月,而激励-cue组没有.
- 激励-cue组在边缘系统内表现出增加的FC.
- 中立cue组在默认模式和背部注意网络之间显示了增强的FC.
结论:
- 非外部增强的CAT促进了持续的行为变化,这表明了内部增强机制.
- 独特的神经连接模式根据强化类型来区分维持的偏好变化.
- 研究结果支持在长期行为干预中使用非外部强化策略.
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