The Wechsler scale of intelligence for adults-III (WAIS-III) is based on 14 subtests. It is used in the Metropolitan University of Ecuador to evaluate the students’ intellectual coefficient (IQ). Each subtest measures a different facet of intelligence, producing the three IQ scores: verbal, performance, and total scales, as well as four index scores: processing speed, perceptual organization, working memory, and verbal comprehension. The development of an expert system (ES) that evaluates the IQ, according to WAIS-III can help in the tabulation of these results, since the process is manual. The KLIC methodology facilitated the creation of the ES and a shell allowed the development of knowledge bases (KB). The ES is composed of fourteen KB, which are responsible for performing the corresponding function of each of the subtests. The rules of production in the KB investigate what the student knows about incomplete figures, vocabulary, cube design, matrices, among other aspects.