A lexical decision task to measure crystallized-verbal ability in Spanish

A classical distinction in cognitive science is between fluid and crystalized abilities. Fluid ability is captured by many common executive function and intelligence tests. Crystalized ability, on the other hand, can be measured quite simply via lexical decision tasks including the English-language Spot-the-Word Test. However, no similar Spanish-language test has been avai-lable up to now. This paper presents a Spanish-language Lexical Decision Task that is quick to administer and was tested on sample of 139 normal adult participants. Results indicate that the new test has good internal consistency and test-retest reliability. An analysis of the correlations between this new test and demographic variables, as well as with the subtests of the Wechsler Adult Intelligence Scale suggest that it is a valid measure of crystalized-verbal ability. It also appears to be a brief but valid assessment of intelligence in general, and its positive correlation with academic achievement establishes predictive validity. The new test has the potential to be a useful research tool to rapidly measure reading ability, crystalized-verbal ability, and intelligence in Spanish speaking adults.