Regarding the procedure and correction of the verbal forward digit span used in Wechsler scales, two important issues have to be taken into account: The final score and the number of trials of each series.
Memory span on the Wechsler Scales. Journal of Clinical and Experimental Neuropsychology, 26(4), 539-549.
Students who constructed a concept map of the Wechsler scales
demonstrated no differential critical thinking when compared with students who did not construct a concept map.
In the case of the Verbal Comprehension Rate from Wechsler Scales
to measure the adults and teenagers Intelligence (Wechsler, 2002) three tests have been included: Vocabulary, Similarities and Information.
Studies have shown that examiners who use the Wechsler Scales
very often incur a variety of errors in the administration and scoring of these tests.
Woodcock (1990) reported strong evidence that the Wechsler scales
do not measure Gf.
Both the Wechsler scales
and the Peabody Picture Vocabulary test have been studied, with reports of good reliability, but questionable validity (Budoff, Corman & Gimon, 1976; Goldman & Hartig, 1975; Henderson & Rankin, 1973; Henggeler & Tavormina, 1979; Reiber & Womack, 1968; Simon & Joiner, 1976) Criticisms of intelligence test have frequently included: (1) Items requesting information inappropriate to the individual's ethnic background; (2) Items requiring high verbal functioning; and (3) Items tapping skills not generally taught in a particular culture (Armstrong, 1972).
JS: That's difficult because Wechsler is given the authorship for every succeeding edition of the Wechsler scales
, even though he died almost 30 years ago.
Because of limited resources and time demands, there is a need for assessing intelligence in a shorter time period than that permitted by the Wechsler scales
. One such instrument is the Kaufman Brief Intelligence Test (K-BIT; Kaufman & Kaufman, 1990) which purports to assess intelligence.
The frequent errors on these two tests include: "a) difficulties in scoring verbal responses, b) incorrect raw scores, c) clerical mistakes, d) full scale IQ discrepancies, and e) performancer subtest scoring errors." (271) Hunnicutt found clerical and mathematical errors on the Wechsler scales
commonplace even by certified and licensed assessment specialists.
The K-ABC had much smaller ethnic differences than the Wechsler scales
and other traditional IQ tests.
NAJP: The Wechsler scales
of intelligence are probably the most well known, best recognized tests of intelligence available.