Pupillary responses index cognitive resource limitations
Pupillary responses index cognitive resource limitations
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DOI：
10.1111/j.1469-8986.1996.tb01071.x
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发表时间：
1996-07-01
期刊：
影响因子：
3.7
通讯作者：
Dykes, KL
中科院分区：
文献类型：
--
作者：
Granholm, E;Asarnow, RF;Dykes, KL
认知任务诱发的瞳孔反应可靠的指数信息处理负荷。然而，以前的研究报告不一致的结果，瞳孔反应的性质时，处理需求的方法或超过可用的处理资源。在数字广度回忆任务中，使用瞳孔记录，在22名正常大学生中进行了检查，每个字符串有5个（低负荷），9个（中等负荷）和13个（过度负荷）数字。瞳孔反应随着处理负荷的增加（待回忆的数字）而系统地增加，直到可用资源的极限（7 +/-2个数字的记忆容量），当它们达到渐近线时，然后随着资源过载（>9个数字）而下降。这些研究结果表明，瞳孔反应系统地增加与增加的处理需求，低于资源限制，在主动处理或接近资源限制的变化不大，和开始下降时，处理需求超过可用资源。
Cognitive task-evoked pupillary responses reliably index information-processing loads. However, previous studies have reported inconsistent findings regarding the nature of the pupillary response when processing demands approach or exceed available processing resources. This condition was examined in 22 normal undergraduates by using pupillometric recordings during a digit span recall task, with 5 (low load), 9 (moderate load), and 13 (excessive load) digits per string. Pupillary responses increased systematically with increased processing load (to-be-recalled digits) until the limit of available resources (memory capacity of 7 +/- 2 digits), when they reached asymptote and then declined with resource overload (>9 digits). These findings suggest that pupillary responses increase systematically with increased processing demands that are below resource limits, change little during active processing at or near resource limits, and begin to decline when processing demands exceed available resources.