Intratrial proactive interference in rats' serial alternation performance in the radial maze
Intratrial proactive interference in rats' serial alternation performance in the radial maze
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DOI：
10.3758/bf03198978
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发表时间：
1996-08-01
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影响因子：
--
通讯作者：
Hicks, M
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文献类型：
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作者：
Cohen, JS;Sturdy, C;Hicks, M
大鼠在被分成四对臂的八臂径向迷宫中获得连续交替任务。每对都与不同的远端刺激相关。最初，大鼠被迫使用每对的左臂或右臂（研究部分），然后暴露于每对的双臂（自由选择或测试部分）。每对中只有先前被阻挡的手臂仍然被诱饵。初始训练后，通过向大鼠提供强制选择（预研究）片段来诱导主动干扰（PI），该片段包含与后续研究片段中的位置相对的安位置。与没有预研究阶段的试验相比，此类试验的自由选择准确性较差。在预研究阶段强迫大鼠双臂站立仅产生短暂的 PI。通过强迫大鼠保持相同的手臂位置，可以使大鼠的自由选择表现略有改善，但前提是测试片段延迟 30 分钟。将预研究和研究部分之间的间隔从 2 分钟增加到 30 分钟可以消除 PI，但是，只有当自由选择测试延迟 2 分钟而不是 30 分钟时。这些结果表明，本次准备中的房内 PI 主要是由于对在最后一个强制选择片段中访问过每对手臂的位置感到困惑。
Rats acquired a serial alternation task in an eight-arm radial maze that was partitioned into four pairs of arms. Each pair was associated with a different distal stimulus. Rats were initially forced to the left or right arm in. each pair (the study segment) before being exposed to both arms in each pair (the free-choice or test segment). Only the previously blocked arm of each pair remained baited. Following initial training, proactive interference (PI) was induced by presenting rats with a forced-choice (prestudy) segment containing ann positions opposite those in the subsequent study segment. Such trials generated poorer free-choice accuracy than did trials without a prestudy segment. Forcing rats to both arms in the pair in a prestudy segment produced only transient PI. A slight improvement in rats' free-choice performance was obtained by forcing them to the same arm position, but only when the test segment was delayed by 30 min. Increasing the interval between the prestudy and study segments from 2 to 30 min eliminated PI, but, only when free-choice testing was delayed by 2 min rather than by 30 min. These results suggest that intratrial PI in this preparation was primarily due to confusion about which arm position in each pair had been visited during the last forced-choice segment.