Abstract

The study aimed at investigating whether the seven-subtest short form based on WAIS-R (Ward 1990) was statistically valid to use on the Swedish version of Wechsler Adult Intelligence Scale, Fourth Edition (WAIS-IV), if this abbreviation was fit to catch the heterogeneity in test performance across age and if this brief measure was possible to abbreviate even more. WAIS-IV data from a non-clinical sample consisting of 261 participants ranging between 18 and 74 in age was analyzed with bivariate and multiple regression analyses, a prorating method for calculation of Full Scale IQ (FSIQ) and its indices as well as paired-samples t-test. The results were contradictory. When the original WAIS-IV was compared to the seven-subtest short form the results showed a good congruence on FSIQ-level between the two sets, but on index level there were several cases of mismatches. In the younger and middle aged sample (<55 years) results on FSIQ as well as index level were in accordance, whereas in the elderly group (∼55 years) they were incongruent. The best reduction of the seven-subtest short form was a four-subtest model, encompassing Block Design, Similarities, Arithmetic and Coding, one subtest from each index, but the t-tests indicated several cases of mismatches between the full WAIS-IV measures and the prorated scores. Applied on the Swedish version of the WAIS-IV the seven-subtest formula appears to be applicable on an FSIQ level, to be suitable for a younger sample, but not for an elderly. Otherwise, this model and the four-subtest model are recommended to be used with caution.

摘要

这项研究旨在调查基于WAIS-R的七项简短测试形式（Ward 1990）在统计学上是否可以有效地用于瑞典版的韦氏成人智力量表第四版（WAIS-IV）（如果该缩写适合）。如果这个简短的措施有可能进一步简化，则可以了解跨年龄测试性能的异质性。使用双变量和多元回归分析，一种按比例分配的方法来计算全智商（FSIQ）及其指数以及成对的配对数据，分析了来自非临床样本的WAIS-IV数据，该样本由261名年龄在18至74岁之间的参与者组成样本t-测试。结果是矛盾的。当将原始的WAIS-IV与7个子测试的简短形式进行比较时，结果显示两组在FSIQ级别上具有很好的一致性，但在索引级别上却有几种不匹配的情况。在年轻和中年样本（<55岁）中，FSIQ和指数水平的结果一致，而在老年组（约55岁）中，结果不一致。减少7个子测试的简短形式的最好方法是使用4个子测试的模型，其中包括块设计，相似性，算术和编码，每个索引中有一个子测试，但是t-测试表明，在完整的WAIS-IV量度与按比例分配的分数之间存在一些不匹配的情况。在瑞典版本的WAIS-IV上使用的7个子测试公式似乎适用于FSIQ级别，适用于年轻样本，但不适用于老年人。否则，建议谨慎使用此模型和四子测试模型。