The aim of this study was to provide preliminary normative guidelines for the use of the Wechsler Adult Intelligence Scale–Fourth Edition (English administration) for South African Eastern Cape Xhosa-speaking adults (n=31), aged 18–32, with 12years of disadvantaged quality of education. The Wechsler Adult Intelligence Scale–Fourth Edition normative indications were compared with those from an equivalent population on the Wechsler Adult Intelligence Scale–Third Edition. The substitution of Wechsler Adult Intelligence Scale–Fourth Edition core subtests with supplemental subtests was also investigated. The Wechsler Adult Intelligence Scale–Fourth Edition and Wechsler Adult Intelligence Scale–Third Edition findings were broadly equivalent, indicating a lowering of 20–25 intelligence quotient points compared with the US standardisation. The use of supplemental subtests revealed improved outcome on all four Index scores. It is concluded that practitioners can gainfully advance to the use of the Wechsler Adult Intelligence Scale–Fourth Edition with this educationally disadvantaged African first language population, on the proviso that the extent of lowering relative to the US standardisation is taken into consideration.
ClaassenN.KrynauwA.PatersonH.MatheM. (2001). A standardization of the WAIS-III for English-speaking South Africans. Pretoria, South Africa: Human Sciences Research Council.
2.
FerrettH. L.ThomasK. G. F.TapertS. F.CareyP. D.ConradieS.CuzenN. L.. . . FeinG. (2014). The cross-cultural utility of foreign- and locally-derived normative data for three WHO-endorsed neuropsycholgogical tests for South African adolescents. Metabolic Brain Disease, 29, 395–408.
3.
ManlyJ. (2005). Advantages and disadvantages of separate norms for African Americans. The Clinical Neuropsychologist, 19, 270–275.
4.
ManlyJ.JacobsD.TouradjieP.SmallS.SternY. (2002). Reading level attenuates differences in neuropsychological test performance between African American and White elders. Journal of the International Neuropsychological Society, 5, 341–348.
5.
MitrushinaM.BooneK. B.RazaniJ.D’EliaL. F. (2005). Handbook of normative data for neuropsychological assessment (2nd ed.). New York: Oxford University Press.
MpofuE.OrtizS. (2009). Equitable assessment practices in diverse contexts. In GrigorenkoE. (Ed.), Multicultural psychoeducational assessment (pp. 41–76). New York: Springer.
8.
NellV. (1999). Standardising the WAIS-III and WMS-III for South Africa: Legislative, psychometric, and policy issues. South African Journal of Psychology, 29, 128–137.
9.
NellV. (2000). Cross-cultural neuropsychological assessment: Theory and practice. Mahwah, NJ: Lawrence Erlbaum.
10.
RoivainenE. (2010). European and American WAIS-III norms: Cross-national differences in performance subtest scores. Intelligence, 38, 187–192.
11.
SattlerJ. M.RyanJ. J. (2009). Assessment with the WAIS-IV. La Mesa, CA: Jerome Sattler.
12.
Shuttleworth-EdwardsA. B. (2010). Practitioner guidelines for career counselling in light of cross-cultural influences on WAIS-III IQ test performance [Guest Issue]. Journal of Psychology in Africa, 20, 413–419.
13.
Shuttleworth-EdwardsA. B. (2012). Guidelines for the use of the WAIS-IV with WAIS-III cross-cultural normative indications [Special Issue on Cognitive Science and Neuropsychology in Southern Africa]. South African Journal of Psychology, 42, 399–410.
14.
Shuttleworth-EdwardsA. B. (2016). The interpretation of WAIS-IV brain injury test protocols for South African Xhosa speaking individuals using WAIS-III cross-cultural norms. In FerraroR. F. (Ed.), Minority and cross-cultural aspects of neuropsychological assessment (pp. 97–114). Lisse, The Netherlands: Swets and Zeitlinger.
15.
Shuttleworth-EdwardsA. B. (in press). Generally representative is representative of none: Pitfalls of IQ test standardizaion in multicutural settings. The Clinical Neuropsychologist.
16.
Shuttleworth-EdwardsA. B.GaylardE. K.RadloffS. E. (2013). WAIS-III test performance in the South African context: Refinement of an existing cross-cultural normative database. In CockcroftK.LaherS. (Eds.), Psychological assessment in South Africa: Research and applications (pp. 17–32). Johannesburg, South Africa: Wits Press.
17.
Shuttleworth-EdwardsA. B.KempR.RustA.MuirheadJ.HartmanN.RadloffS. (2004). Cross-cultural effects on IQ test performance: A review and preliminary normative indications on WAIS-III test performance. Journal of Clinical and Experimental Neuropsychology, 26, 903–920.
18.
Shuttleworth-EdwardsA. B.van der MerweA S. (2016). WISC-IV and WAIS-III South African cross-cultural normative data stratified for quality of education. In FerraroR. (Ed.), Minority and cross-cultural aspects of neuropsychological assessment (pp. 72–96). Lisse, The Netherlands: Swets and Zeitlinger.
19.
Shuttleworth-EdwardsA. B.van der MerweA. S.van TonderP.RadloffS. E. (2013). WISC-IV test performance in the South African context: A collation of cross-cultural norms. In CockcroftK.LaherS. (Eds.), Psychological assessment in South Africa: Research and applications (pp. 33–47). Johannesburg, South Africa: Wits Press.
StraussE.ShermanE. M. S.SpreenO. (2006). A compendium of neuropsychological tests: Administration, norms, and commentary. New York: Oxford University Press.
22.
van der VijverF.TanzerN. (2014). Bias and equivalence in cross-cultural assessment: An overview. Revue Europeenne de Psychologie Appliquee / European Review of Applied Psychology, 54, 119–135.
23.
WechslerD. (1997). Wechsler Adult Intelligence Scale–Third Edition (WAIS-III). San Antonio, TX: The Psychological Corp.
24.
WechslerD. (2008). Wechsler Intelligence Scale–Fourth Edition (WAIS-IV): Technical and interpretive manual. San Antonio, TX: Pearson.
25.
WechslerD. (2014). Wechsler Adult Intelligence Scale–Fourth Edition (WAIS-IVSA). Adaptation for South Africa. Johannesburg, South Africa: JvR Psychometrics.
26.
WichertsJ. M.DolanC. V.HessenD. J.OosterveldP.van BaalG. C. M.BoomsmaD. I.SpanM. M. (2004). Are intelligence tests measurement invariant over time? Investigating the nature of the Flynn effect. Intelligence, 32, 509–537.
27.
ZhouX.GreJ.ZhuJ. (2010). The Flynn effect and the Wechsler Scales. In WeissL. G.SaklofskeD. H.CoalsonD. L.RaifordE. S. (Eds.), WAIS-IV clinical use and interpretation (pp. 141–166). London, England: Academic Press.
