Rueda Alicia D, Schmitter-Edgecombe Maureen
Department of Psychology, Washington State University, Pullman, WA 99164-4820, USA.
Neuropsychology. 2009 Mar;23(2):178-88. doi: 10.1037/a0014289.
Accurate time estimation abilities are assumed to play an important role in efficient performance of many daily activities. The authors investigated the role of episodic memory impairment in temporal perception using a prospective verbal time estimation paradigm. Verbal time estimations were made for filled intervals both within (i.e., <30 s) and beyond the time frame of working memory. In Experiment 1, the verbal time estimates of 24 individuals with mild cognitive impairment (MCI) were comparable with those of age-matched controls at both short and long (i.e., >30 s) intervals. The verbal time estimates of both older adult groups, however, deviated more significantly from true time when compared with younger adult controls. In Experiment 2, 17 individuals with Alzheimer's disease (AD) demonstrated greater error and variability in their time estimates, but no disproportionate differences emerged between short- and long-duration estimates when compared with age-matched controls. The findings did not support a noteworthy role for episodic memory impairment in temporal perception but rather elucidated a significant effect of normal aging, as well as a detrimental effect of AD on temporal perception.
准确的时间估计能力被认为在许多日常活动的高效执行中起着重要作用。作者使用前瞻性言语时间估计范式研究了情景记忆损伤在时间感知中的作用。对工作记忆时间框架内（即<30秒）和超出该时间框架的填充间隔进行言语时间估计。在实验1中，24名轻度认知障碍（MCI）个体在短间隔和长间隔（即>30秒）时的言语时间估计与年龄匹配的对照组相当。然而，与年轻成人对照组相比，两个老年组的言语时间估计与真实时间的偏差更大。在实验2中，17名阿尔茨海默病（AD）患者在时间估计上表现出更大的误差和变异性，但与年龄匹配的对照组相比，短时间和长时间估计之间没有出现不成比例的差异。研究结果不支持情景记忆损伤在时间感知中起显著作用，而是阐明了正常衰老的显著影响以及AD对时间感知的有害影响。
