Executive effectiveness on Stroop type interference tasks. A validation study of a numerical and manual version (CANUM)

Francisco Gutiérrez-Martínez, Melchor Ramos-Ortega, José-Óscar Vila-Chaves


This paper presents CANUM, a new numerical and manual version of Stroop interference task. The stimulus used replaces the classical color-word conflict by the numerosity-number conflict considering the interference generated between the symbolic value of the number and the amount of times it is repeated. CANUM also replaces the vocal answer by a simple right-left typing. The aim was twofold: first, to ensure a general measure of attentional control capacity not linked to the verbal factor; and second, to extent the population to whom the test would be applied, avoiding the restrictions on reading ability inherent to the classical Stroop task. The results obtained in a sample of school children reveal a high reliability in terms of internal consistency, as well as a significant predictive validity in relation to two criterial measures: general intelligence and working memory. This supports its usefulness as an instrument for the assessment of executive function and controlled attention applicable in a wide age range, both for research purposes as for clinical and educational goals.


Stroop task; attentional control; executive function; working memory capacity; general intelligence.

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DOI: http://dx.doi.org/10.6018/analesps.34.1.263431


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