Solway Alec, Lin Zhen, Vinaik Ekansh
Department of Psychology, University of Maryland, College Park, MD 20742.
Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD 20742.
Proc Natl Acad Sci U S A. 2021 Jan 5;118(1). doi: 10.1073/pnas.2014271117.
Real-life decisions are often repeated. Whether considering taking a job in a new city, or doing something mundane like checking if the stove is off, decisions are frequently revisited even if no new information is available. This mode of behavior takes a particularly pathological form in obsessive-compulsive disorder (OCD), which is marked by individuals' redeliberating previously resolved decisions. Surprisingly, little is known about how information is transferred across decision episodes in such circumstances, and whether and how such transfer varies in OCD. In two experiments, data from a repeated decision-making task and computational modeling revealed that both implicit and explicit memories of previous decisions affected subsequent decisions by biasing the rate of evidence integration. Further, we replicated previous work demonstrating impairments in baseline decision-making as a function of self-reported OCD symptoms, and found that information transfer effects specifically due to implicit memory were reduced, offering computational insight into checking behavior.
现实生活中的决策往往是反复进行的。无论是考虑在新城市找工作，还是做一些诸如检查炉灶是否关火之类的日常琐事，即使没有新信息，决策也常常会被重新审视。这种行为模式在强迫症（OCD）中表现为一种特别病态的形式，其特征是个体反复思考之前已经做出的决定。令人惊讶的是，对于在这种情况下信息是如何在不同决策阶段之间传递的，以及在强迫症中这种传递是否以及如何变化，我们知之甚少。在两项实验中，来自重复决策任务和计算建模的数据表明，对先前决策的内隐记忆和外显记忆都会通过影响证据整合的速率来影响后续决策。此外，我们重复了之前的研究，证明了基线决策能力会因自我报告的强迫症症状而受损，并且发现由于内隐记忆导致的信息传递效应会减弱，这为检查行为提供了计算方面的见解。
