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甲基胺对使用并发链的老鼠概率折扣的影响

Rebecca Rose Hazel Bodeker¹, Randolph C Grace¹

¹University of Canterbury, Christchurch, New Zealand.

Behavioural processes

|November 24, 2023

概括

像甲基胺这样的刺激药物通过改变老鼠对潜在奖励的评价来影响风险决策. 急性甲基胺降低了对奖励概率和规模的敏感性,增加了冲动选择.

科学领域:

行为神经科学行为神经科学
心理药理学心理药理学
决策研究决策研究

背景情况:

冲动性研究经常检查兴奋剂药物如何影响风险选择.
了解强化大小对这种行为的影响至关重要.

研究的目的:

为了研究甲基胺如何影响大鼠的选择行为在一个概率折扣任务.
为了确定强化大小和概率在甲基胺对风险选择的影响中的作用.

主要方法:

鼠被训练在一个并发的链条,概率折扣任务与不同的强化概率和恒定的,不平等的大小.
甲基胺被急性和慢性地管理,在不同阶段分析行为数据.

主要成果:

在基线时,老鼠对强化概率和大小都表现出敏感性,包括大小效应.
急性甲基胺的剂量依赖性降低了效果的概率,而慢性管理没有持久的影响.
这项研究是第一个使用概率折扣程序在老鼠中证明大小效应的研究.

结论:

急性甲基胺管理通过减少奖励概率和规模的影响来损害决策,从而增加风险选择.
这些发现突出了兴奋剂药物,强化变量和冲动行为倾向之间的复杂相互作用.

关键词:

同时连锁的链条.大小效应的影响.甲基胺是一种甲基胺.概率折扣的使用方法.快速获取的方式

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