has subject area Affect Amphetamine Diagnostic Techniques, Neurological - Reflex, Startle Environment and Public Health - Analysis of Variance Environment and Public Health - Double-Blind Method Environment and Public Health - Sex Factors Female Health Care Evaluation Mechanisms - Analysis of Variance Health Care Evaluation Mechanisms - Double-Blind Method Health Care Quality, Access, and Evaluation - Sex Factors Hemodynamics - Heart Rate Humans Investigative Techniques - Analysis of Variance Investigative Techniques - Double-Blind Method Methods - Double-Blind Method Nervous System Physiological Phenomena - Reflex, Startle Pharmaceutical Preparations - Placebos Physical Examination - Reflex, Startle Psychological Phenomena - Reflex, Startle Sympathomimetics Therapeutics - Placebos Vital Signs - Heart Rate