Abstract: A diagnostic tool for assessing symptoms of neurodevelopmental conditions or disorders of patients and providing an objective measurement of symptoms of such conditions or disorders, including deficiencies in social competency of a patient. The tool can include a health data collection interface enabling a patent to interact with the tool and provide feedback to stimulus provided by the diagnostic tool in in each of at least three test areas related to the patient's ability to intuit emotional state from physical cues. The tool can further include an automated health data assessment device configured to obtain the social feedback of the patient for each test area of the at least three test areas, and to automatically assess social competency of the patient based on the social feedback and to generate an objective measurement of the social competency of the patient for use in diagnosing the patient for a potential neurodevelopmental condition.