Nocera F D, Ferlazzo F, Borghi V
Department of Psychology, University of Rome La Sapienza, Italy.
Psychophysiology. 2001 Sep;38(5):796-806.
For some years, the limits of classic reliability theory have been recognized in favor of the Generalizability Theory, which deals simultaneously with multiple sources of error. This measurement model can be particularly useful when applied to research in cognitive psychophysiology. Indeed, studies in this field often deal with estimated measures whose reliability is rarely taken into account. In this paper, we report two generalizability studies in order to investigate the usefulness of G theory in providing information about the reliability of experimental results. The first was carried out on P300 measured during an oddball task, and the second was carried out on ERPs recorded during a recognition memory task. As expected, results showed that P300 modulation was more reliable than ERP memory modulation. This suggests that G theory can be a useful tool to estimate the reliability of psychophysiological findings, complementing and extending results from conventional analyses.
多年来，经典可靠性理论的局限性已得到公认，转而支持可同时处理多种误差来源的概化理论。当应用于认知心理生理学研究时，这种测量模型可能特别有用。事实上，该领域的研究通常涉及估计测量值，而其可靠性很少被考虑在内。在本文中，我们报告了两项概化研究，以调查概化理论在提供有关实验结果可靠性信息方面的有用性。第一项研究是在奇偶数任务期间测量的P300上进行的，第二项研究是在识别记忆任务期间记录的事件相关电位（ERP）上进行的。正如预期的那样，结果表明P300调制比ERP记忆调制更可靠。这表明概化理论可以成为估计心理生理学研究结果可靠性的有用工具，补充和扩展传统分析的结果。
