Validity and reliability of psychometric tests at Evalart
Evalart is the candidate assessment platform that applies international psychometric standards to every one of its tests for companies across Latin America. Each instrument, from personality tests (DISC, Big Five) to aptitude tests, goes through five technical controls before publication: item selection, normative weighting, Cronbach's alpha coefficient, criterion validation, and construct validation.
Thorough item and scale selection
Each assessment is built from theoretical deductions drawn from recognized research (Magnusson, 1972), ensuring content validity. Following the principle of parsimony from Nunnally and Bernstein (1994), Evalart includes only the items necessary to measure the construct, avoiding overly long tests. In personality tests, masked wording reduces social desirability bias and encourages spontaneous responses.
Weighting based on a real normative group
Score ranges are calculated using a normative group of at least 100 subjects, which produces statistically representative, non-arbitrary results — unlike scales built without a sample base.
Internal consistency: Cronbach's alpha ≥ 0.7
All Evalart tests meet or exceed a Cronbach's alpha of 0.7 (Nunnally and Bernstein, 1994), the internationally accepted threshold. This calculation also helps identify and remove items that don't contribute to the scale's consistency.
Criterion and construct validation
Scores are correlated with external indicators of real on-the-job performance (Anastasi, 1973), and factor analysis (Hernández-Nieto, 2011; Yela, 1996) verifies that the measured subfactors match the original theoretical model.
Ongoing review by psychometric specialists
A team of psychometric professionals periodically reviews every Evalart assessment to ensure it stays current and maintains its quality. This makes it possible to identify items that lose relevance over time and adjust interpretation criteria as the work context changes.
Why this matters for your hiring process
A test without these controls can filter candidates by chance, not by real ability. Evalart validates every instrument in its catalog of 500+ tests using this same methodology. Programming, psychometrics, aptitude, and languages included: view the catalog. It protects the integrity of the result with camera-based anti-fraud monitoring during the assessment.