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Further Development of the Big Store Multiple Errands Test.

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  • 1NCCO Rehabilitation Services, Toronto, ON, Canada.

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The Big-Store Multiple Errands Test (MET) shows high reliability for assessing executive function in people with acquired brain injury (ABI). It effectively distinguishes ABI patients from controls, highlighting its clinical utility.

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Psychology

Background:

  • Executive function impairments are common after acquired brain injury (ABI).
  • The Multiple Errands Test (MET) assesses real-world functional impact of these impairments.
  • The Big-Store MET variant needs further validation for clinical use.

Purpose of the Study:

  • Establish inter-rater reliability of the Big-Store MET.
  • Explore known-group validity in distinguishing adults with ABI from healthy controls.
  • Investigate the influence of environmental factors on Big-Store MET performance.

Main Methods:

  • Administered the Big-Store MET to 5 individuals with ABI and 4 healthy controls by two trained raters.
  • Analyzed inter-rater reliability using intra-class correlation coefficients (ICC).
  • Examined known-group validity with Cohen's d effect size and descriptively assessed environmental factors.

Main Results:

  • Very high inter-rater reliability for all MET performance scores (ICC = 0.74-1.00).
  • Moderate to large effect sizes (d = 0.48-1.06) for known-group validity on five of six scores.
  • Healthy controls performed better with higher familiarity and lower load; ABI participants showed the opposite.

Conclusions:

  • The Big-Store MET demonstrates strong reliability and validity for assessing executive function deficits in individuals with ABI.
  • Findings suggest the Big-Store MET is a potentially valuable clinical tool.
  • Environmental factors significantly impact MET performance differently in ABI and control groups, warranting further investigation.