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Arch Clin Neuropsychol. 2016 Apr 26. pii: acw019. [Epub ahead of print]

Evaluating Decision-Making: Validation and Regression-Based Normative Data of the Judgment Assessment Tool.

Author information

1
Psychology Department, Université du Québec à Montréal, Montréal, QC, Canada frederique.escudier@gmail.com.
2
Psychology Department, Université du Québec à Montréal, Montréal, QC, Canada.
3
Psychology Department, Centre hospitalier de l'Université de Montréal, Montréal, QC, Canada.
4
School of Psychology, Université Laval, Centre de recherche de l'Institut universitaire en santé mentale de Québec, QC, Canada.
5
Centre intégré universitaire de santé et de services sociaux du Nord-de-l'Île-de-Montréal, Montréal, QC, Canada.

Abstract

OBJECTIVE:

This study presents the results of the development and validation of the Judgment Assessment Tool (JAT). The JAT measures two core aspects of judgment, namely generation of solutions (G) and assessment of options (A), the two first stages of decision-making process.

METHOD:

During the test development phase (study 1), a preliminary version of the JAT was evaluated by 14 experts and tested on 30 healthy controls (HC). One hundred and twenty HC (20-84 years old) and 24 participants with mild Alzheimer's disease (AD) were subsequently tested on the final version of the JAT (study 2). HC participants aged 60 and over and AD participants underwent a neuropsychological evaluation.

RESULTS:

The internal consistency of the final version of the JAT assessed by Cronbach's a was 0.71 for the HC group and 0.85 for the AD group. Performance on the JAT was normally distributed both in the HC and AD groups. The test correlated with abstract reasoning, verbal fluency, and working memory. Results revealed adequate test-retest reliability and excellent interrater reliability (k coefficient was 0.92 for the G section and 0.93 for the A section). Demographically adjusted normative data were generated based on a regression analysis and results showed that AD participants performed worse than HC with a large effect size (Cohen's d = 1.79).

CONCLUSION:

Overall, these results provide evidence of the reliability and strong construct validity of the JAT to evaluate judgment.

KEYWORDS:

Alzheimer's disease; Dementia; Executive function; Neuropsychological assessment; Neuropsychological tests; Problem solving

PMID:
27193370
DOI:
10.1093/arclin/acw019

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