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Factors Associated with Māori Performance on the WAIS-IV.

Margaret D Dudley1, Suzanne L Barker-Collo2, Denise L Wilson3

  • 1(Te Rarawa, Te Aupōuri, Ngāti Kahu) School of Psychology, University of Auckland, Auckland, New Zealand.

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists
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Summary

This study established normative data for the Wechsler Adult Intelligence Scale-IV (WAIS-IV) for Māori adults in New Zealand. Factors like acculturation and education significantly influenced test performance, highlighting the need for culturally sensitive neuropsychological assessments.

Keywords:
AssessmentCross-cultural neuropsychologyIndigenousIntelligenceMāori

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Area of Science:

  • Neuropsychology
  • Psychometrics
  • Indigenous Health

Background:

  • Neuropsychological tests are standard for assessing cognitive function in Māori, New Zealand's indigenous population.
  • There is a significant gap in research regarding the psychometric validation of these tests for Māori.
  • Understanding factors influencing test performance is crucial for accurate assessment.

Purpose of the Study:

  • To establish a normative dataset for the Wechsler Adult Intelligence Scale-IV (WAIS-IV) specifically for Māori adults.
  • To investigate factors impacting the performance of Māori adults on the WAIS-IV.
  • To inform culturally appropriate neuropsychological assessment practices for Māori.

Main Methods:

  • Administered the Wechsler Adult Intelligence Scale-IV (WAIS-IV) to 284 Māori adults, stratified by age and gender.
  • Recruited participants from diverse urban, regional, and rural areas across New Zealand.
  • Collected data from participants whose primary language was English, representing various Māori Iwi (tribes).

Main Results:

  • Developed a normative dataset for the WAIS-IV tailored to the Māori population.
  • Identified acculturation, education level, and income as significant factors influencing test scores.
  • "Culturally positive experiences" also emerged as a variable impacting performance.

Conclusions:

  • The study provides essential normative data for the WAIS-IV in Māori adults.
  • Acculturation, socioeconomic factors, and cultural experiences are critical considerations in interpreting neuropsychological test results for Māori.
  • Findings underscore the necessity of culturally adapted and validated neuropsychological tools for indigenous populations.