Objective: Deficits in ADHD executive function (EF) task have been widely documented in a number of different studies. The aim of this work is to analyze the characteristics of auditory vigilance in ADHD and control subjects in two conditions: with and without interference. Method: in the first study the Merrill’s (1992) procedure on automaticity with the dual-task interference paradigm was used; in the second study the auditory test with automatic procedure was used. Results: The results of the study confirm that people with ADHD show deficits in auditory vigilance tests and become less careful when interference is introduced. Conclusion: Results were discussed in terms of a deficit in automaticity process.