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药物滥用者决策的计算建模:测试贝查拉的假设
Laurent Avila Chauvet1, Diana Mejía Cruz1
1Psychology Department, Sonora Institute of Technology, Obregon City, Sonora, Mexico.
Frontiers in psychology
|June 17, 2024
概括
药物滥用损害了决策,影响了从收益和损失中学习. 一个模拟对奖励和惩罚敏感性的模型准确地预测了物质使用障碍和控制障碍的个体如何从经验中学习.
科学领域:
- 认知神经科学 认知神经科学
- 行为经济学是一种行为经济学.
- 心理学 心理学 心理学
背景情况:
- 药物滥用严重损害了认知功能,特别是决策过程.
- 爱荷华州博任务 (IGT) 是评估决策学习的关键行为指标.
- 现有理论表明,药物滥用会通过优先考虑收益,失去敏感性或工作记忆能力影响决策.
研究的目的:
- 调查在药物滥用中的决策缺陷背后的认知机制.
- 测试关于对决策过程中获益,损失和工作记忆的敏感性的假设.
- 将动态模型与人类参与者 (药物滥用者和对照者) 的性能进行比较.
主要方法:
- 使用线性运算符模型作为学习规则开发动态模型.
- 模拟具有不同灵敏度对收益和损失以及不同记忆因子的代理.
- 模拟剂的性能与20名药物滥用者和20名健康成年人的行为数据进行了比较.
主要成果:
- 具有增加记忆力和高损失灵敏度的模型代理者更喜欢具有较少惩罚的有利选择.
- 增加增益灵敏度和记忆力下降的代理人更喜欢损失更大的不利选择.
- 人类参与者的表现与模型预测保持一致,特别是在区分最佳结果和次优结果方面.
结论:
- 线性运营商模型有效地模拟了受药物滥用影响的决策过程.
- 对收益/损失和工作记忆的敏感性是理解受损决策的关键参数.
- 在临床和社区样本中评估这些模型参数对于有针对性的干预至关重要.
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