BEHAVIOR ANALYSIS - Key Persons

Dr. Andrew Gardner is a Tucson native, bilingual and bicultural and has been serving families of children with neurodevelopmental and related disorders over the past 15+ years across clinic, home, school, and public settings. He has peer-reviewed publications and professional presentations specialized in the areas of assessment and treatment of challenging behavior exhibited by children and adolescents. He has participated in Maternal and Child Health Bureau funded Leadership Education in Neurodevelopmental and other Related Disabilities (LEND) programs through the University of Iowa Hospitals and Clinics, the Kennedy Krieger Institute (Neurobehavioral Outpatient Clinic - Department of Behavioral Psychology), and currently serves as faculty at The University of Arizona Leadership Education in Neurodevelopmental and Related Disabilities (Arizona LEND). Dr. Gardner supervises a Behavioral Pediatrics Clinic in the department of Psychiatry and serves children and families at Children's Clinics for Rehabilitative Services. Dr. Gardner's research interests include: Functional Analytic Assessment Methodology for Childhood Aberrant Behavior Qualities of Attention in Function-Based Treatment Hispanic/Latino Parenting, Acculturation, and Cross-cultural Treatment Acceptability Therapeutic strategies for challenging behavior based in the science of Applied Behavior Analysis (ABA) for diverse diagnoses including neurodevelopmental disabilities

Job Titles:

• Certified Behavior Analyst

Dr. Chelsea Carr is a Board Certified Behavior Analyst with over 10 years of experience serving families of children with neurodevelopmental disabilities. She received her doctoral degree in special education with an emphasis in applied behavior analysis at the University of Arizona and completed a clinical externship at the University of Iowa. She has experience conducting assessments and supporting and training caregivers and other providers on behavior intervention plans in school, clinical, and home settings. She has presented research at regional and national conferences on topics related to the assessment and treatment of challenging behavior displayed by children with and without disabilities. In her free time, Chelsea enjoys running and cycling, trying all the amazing food in Tucson, and traveling with family and friends.

Job Titles:

• Assistant Professor of Practice

Marcella Hangen is an Assistant Professor of Practice in the Special Education Program. She earned a Ph.D. from the University of Kansas, she is a board certified behavior analysts-doctoral level with over 10 years of experiencing serving families of children with various intellectual and developmental disabilities. Her areas of research and teaching expertise include early intervention and the assessment and treatment of severe problem behavior.

Job Titles:

• Program Director
• Assistant Professor of Practice

Rebecca Hartzell is Assistant Professor of Practice in the Special Education Program and Director of the MA program in Applied Behavior Analysis. She earned her doctorate in special education with an emphasis in autism and applied behavior analysis. Dr. Hartzell teaches courses, advises, and supervises students pursuing board certification in applied behavior analysis and provides clinical support to parents and families of children with neurodevelopmental disabilities. She is the author and co-author of peer-reviewed journal articles focused on social-skills interventions and inclusion.