Whetstone T
Department of Psychology, East Carolina University, Greenville, NC 27858, USA.
Brain Cogn. 1998 Apr;36(3):290-309. doi: 10.1006/brcg.1998.0997.
This single case study was designed to gather evidence regarding whether the mental representations mediating multiplication fact retrieval make use of single or multiple codes. MC is a brain-damaged volunteer whose numerical processing impairments were limited to multiplication fact retrieval. He relearned three sets of multiplication facts. Each set was relearned in one of three input formats: Arabic, written verbal, or spoken verbal. Following training all facts were tested in all input formats. MC's posttraining performance was virtually error free and showed no effects of input format. However, reaction-time data showed fact retrieval was fastest when the training format matched the test format. Results are discussed in relation to single- and multiple-code models of multiplication fact retrieval.
本单病例研究旨在收集证据，以确定介导乘法运算事实提取的心理表征是使用单一代码还是多个代码。MC是一名脑损伤志愿者，其数字处理障碍仅限于乘法运算事实提取。他重新学习了三组乘法运算事实。每组事实都以三种输入格式之一重新学习：阿拉伯数字、书面文字或口头表述。训练后，所有事实都以所有输入格式进行测试。MC训练后的表现几乎没有错误，且未显示出输入格式的影响。然而，反应时间数据表明，当训练格式与测试格式匹配时，事实提取速度最快。研究结果将结合乘法运算事实提取的单代码和多代码模型进行讨论。
