Habitual prospective memory in schizophrenia
Habitual prospective memory in schizophrenia
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DOI：
10.1186/1471-244x-3-9
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发表时间：
2003-01-01
期刊：
影响因子：
4.4
通讯作者：
Gilbert, Abigail L.
中科院分区：
文献类型：
--
作者：
Elvevag, Brita;Maylor, Elizabeth A.;Gilbert, Abigail L.
背景资料：前瞻性记忆（PM），即在没有任何明确提示的情况下记住未来必须做的事情的行为，为研究内源性监控中的问题提供了一个有用的框架。这是因为它需要区分两个内部生成的过程，即执行动作的意图与实际执行动作。在习惯性任务中，例如每隔几个小时服药，定期执行相同的PM任务，因此个体能够区分想法（即，考虑服药）从行动（即，方法：我们评估了精神分裂症患者的习惯性PM，采用了一个实验室模拟的习惯性PM任务，其中，同时操纵一个球周围的障碍课程（正在进行的活动），参与者在每次试验（PM任务）期间翻转计数器一次。每次试验后，参与者被问到他们是否记得把计数器翻过来。结果：与报告PM反应的对照组相比，精神分裂症患者犯了不成比例的错误（即，计数器翻转）在遗漏错误之后（即，柜台没有翻转）。在报告发生遗漏错误方面没有组间差异（即，忘了把柜台）时，其实PM responses.Conclusion：精神分裂症患者表现出一个特定的赤字区分两个内部产生的来源，归因于无论是穷人的源监测或时间歧视。
Background: Prospective memory (PM), the act of remembering that something has to be done in the future without any explicit prompting to recall, provides a useful framework with which to examine problems in internal-source monitoring. This is because it requires distinguishing between two internally-generated processes, namely the intention to perform an action versus actual performance of the action. In habitual tasks, such as taking medicine every few hours, the same PM task is performed regularly and thus it is essential that the individual is able to distinguish thoughts (i.e., thinking about taking the medicine) from actions (i.e., actually taking the medicine).Methods: We assessed habitual PM in patients with schizophrenia by employing a laboratory analogue of a habitual PM task in which, concurrently with maneuvering a ball around an obstacle course (ongoing activity), participants were to turn over a counter once during each trial (PM task). After each trial, participants were asked whether they had remembered to turn the counter over.Results: Patients with schizophrenia made a disproportionate number of errors compared to controls of reporting that a PM response had been made (i.e., the counter turned over) after an omission error (i.e., the counter was not turned over). There was no group difference in terms of reporting that an omission error occurred (i.e., forgetting to turn over the counter) when in fact a PM response had been made.Conclusion: Patients with schizophrenia displayed a specific deficit distinguishing between two internally-generated sources, attributable to either poor source monitoring or temporal discrimination.