Kappauf W E
Am J Ment Defic. 1976 Nov;81(3):240-7.
Arguments were presented to show that the procedures of covariance adjustments for MA or for MA and CA are unsuited to the analysis of comparative data for retarded and nonretarded persons. Whatever the task and the performance levels of such subjects, the performance measures for both groups must always define a single continuous regression surface. It was proposed that graphical inspection of the regression surface will properly suggest the relative contributions of CA, MA, and IQ to the performance under study. Some of the data of the Temple longitudinal studies were used to illustrate the graphic procedure.
有人提出论据表明，对心理年龄（MA）或心理年龄与实足年龄（CA）进行协方差调整的程序不适用于分析智力迟钝者和非智力迟钝者的比较数据。无论任务以及此类受试者的表现水平如何，两组的表现测量值必须始终定义一个单一的连续回归曲面。有人提议，对回归曲面进行图形检查将恰当地表明实足年龄、心理年龄和智商对所研究表现的相对贡献。坦普尔纵向研究的一些数据被用来阐明这种图形程序。
