Evoked potential correlates of visual item recognition during memory-scanning tasks.
Evoked potential correlates of visual item recognition during memory-scanning tasks.
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在记忆扫描任务期间诱发视觉项目识别的潜在关联。
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
R. O'donnell
中科院分区：
文献类型：
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作者：
F. E. Gomer;Ronald J. Spicuzza;R. O'donnell
在一系列项目识别任务中，记录了6名受试者的视诱发电位。当呈现一个测试刺激时，观察者必须决定它是否先前已经被记住（即，它是否属于与否定集合相对的肯定集合），并相应地做出选择反应时间响应。P300振幅明确大于以下积极的字母介绍比以下消极的字母介绍。这一结果与P30O增强的“模板匹配”模型是一致的，但更重要的是，它将这一理论的潜在普遍性扩展到了复杂的认知任务和刺激事件，而不仅仅是检测简单的感官刺激。第二个正峰的潜伏期在所有正集大小上基本保持不变，这一事实表明它反映了记录或编码刺激输入所需的最小时间。相反，P300潜伏期随着阳性集大小的增加而增加，即，因为信息处理需要更长的时间才能完成。
Visually evoked potentials elicited by tachistoscopically displayed alphabetic stimuli were recorded at vertex from six human subjects during a series of item recognition tasks. When presented with a test stimulus, the observer had to decide whether it had been memorized previously (i.e., whether it belonged to the positive as opposed to the negative set) and made a choice reaction time response accordingly. P300 amplitude was unequivocally greater following positive letter presentations than it was following negative letter presentations. This result is consistent with a “template-matching” model of P30O enhancement, but, more importantly, it extends the potential generality of this theory beyond the detection of simple sensory stimuli to complex cognitive tasks and stimulus events. The latency of the second positive peak remained essentially invariant across all positive set sizes, a fact which suggested that it reflected the minimum time required to register or encode the stimulus input. In contrast, P300 latency increased as positive set size was increased, i.e., as information processing took longer to complete.