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Abstract
The goal of this study was to evaluate the developmental trajectory of response inhibition and state regulation in 60 nonreferred boys ranking in age from 7 to 12 years. For this purpose, we used a go-no go test that was derived from Sanders's (1983) theory of state regulation. In this test, go-no go stimuli were presented on a monitor with a presentation rate of 1 sec (fast condition), 4 sec (medium condition), or 8 sec (slow condition). In accordance with Sanders's theory, we hypothesized that, if state regulation develops in the elementary school years, then the youngest age group (7 and 8 years) would demonstrate poor impulse control, particularly in the fast and slow conditions, in which state regulation was assumed to be essential. Our hypothesis was supported. Findings reflected a developmental course in state regulation in the elementary school years. We discuss the clinical impact of the results with reference to attention deficit hyperactivity disorder.