RESUMEN
The Rorschach Developmental Index (DI) is a composite measure of psychological development. The aim of this study was to examine the criterion validity of the DI by investigating its relationship with age, nonverbal intelligence, and the impact of institutionalization in a sample of Brazilian children. The sample included 231 children, ages 7 to 11, who were either living with their families or in an institutionalized setting. The results indicated that the DI is strongly associated with nonverbal intelligence. Multiple regression analysis revealed that 71% of the variability in the DI was associated with nonverbal intelligence, whereas age explained only 2%. Moreover, the DI scores and nonverbal intelligence scores were significantly lower for children living in institutionalized settings. The DI appears to be effective in assessing various levels of psychological development, especially when expressed in cognitive ability. The DI was developed in the United States, and this study suggests that the DI can be adapted to diverse cultures, regions, or languages.