Ward L Charles, Ryan Joseph J, Axelrod Bradley N
Veterans Affairs Medical Ctr.
Psychol Assess. 2000 Sep;12(3):341-345. doi: 10.1037/1040-3590.12.3.341.
Confirmatory factor analyses with the standardization data of the Wechsler Adult Intelligence Scale-Third Edition (Wechsler, 1997a) compared 6 models with 1 to 4 factors for 11- and 13-subtest versions of the test. Three factors usually fit the data better than 2 factors, but 2-factor models were more parsimonious. A 2-factor model with a Verbal Comprehension factor (Vocabulary, Similarities, Information, and Comprehension) was as good as and sometimes better than the 2-factor model defined by the traditional separation of Verbal and Performance subtests. For 3-factor models, alternative specifications of processing speed subtests on either the Perceptual Organization or Freedom From Distractibility factor were comparable, and specifying a 4th factor for Digit Symbol and Symbol Search had little advantage in comparison with 3-factor models with correlated errors for the 2 subtests.
使用韦氏成人智力量表第三版（韦克斯勒，1997a）的标准化数据进行的验证性因素分析，比较了该测试11个分测验版本和13个分测验版本的6种模型，这些模型包含1至4个因素。通常，三因素模型比两因素模型更能拟合数据，但两因素模型更为简约。一个包含言语理解因素（词汇、相似性、信息和理解）的两因素模型与传统的言语和操作分测验分离所定义的两因素模型效果相当，有时甚至更好。对于三因素模型，将加工速度分测验指定在知觉组织因素或抗干扰因素上的不同设定具有可比性，并且与为数字符号和符号搜索指定第四个因素相比，为这两个分测验指定相关误差的三因素模型几乎没有优势。
