Associates in Behavioral Diagnostics and Treatment

Click here to edit subtitle

Learn About Our Professionals

At Associates in Behavioral Diagnostics and Treatment, our staff may have varied backgrounds, but we are all united in our mission to help our clients. Our clinicians have a wide range of specialty training and experience to better help you and your family.

Amanda L. Pelphrey, Psy.D.

Amanda L. Pelphrey, Psy.D. is a clinical psychologist, licensed in PA, and the founder and co-owner of the group practice (AIBDT).  

A graduate of Miami University (B.A.) & Indiana University of Pennsylvania (Psy.D.), Dr. Pelphrey is a Child Psychologist who specializes in psychological testing & diagnostics, child development and neurobehavioral disorders, including ADHD, anxiety disorders, autism spectrum disorders, infant/toddler developmental delays, language and cognitive impairments, learning disorders and Tourette's disorder. Dr. Pelphrey is certified in CBIT from Tourette Syndrome Behavior Therapy Institute (TS-BTI).  Additionally, Dr. Pelphrey has special interest in ethics in the practice of psychology and psychiatry. 

Dr. Pelphrey previously worked at United Cerebral Palsy in upstate NY, as well as at the Child Development Unit at Children's Hospital of Pittsburgh. She held adjunct teaching positions in child development (Wells College) and learning and behavior (Chatham University). She is published in preschool development literature (Developmental Behavioral Pediatrics, 4e , 2009). Dr. Pelphrey is a member of the Society for Developmental and Behavioral Pediatrics, Pennsylvania Association for Infant Mental Health, and the PA Psychological Association. 

Andrew J. Ward, Ph.D.

Andrew J. Ward, Ph.D. is a clinical psychologist, licensed in PA, and co-owner of the group practice. He specializes in adolescent and adult psychotherapy, substance abuse/addiction treatment, sexual addiction, couples therapy, anxiety/depression and relationship issues. Dr. Ward has extensive experience in both juvenile and adult corrections, and he provides forensic consultation, including pretrial/pre-incarceration evaluations and court-requested sentencing recommendations. 

A graduate of Duquesne University's Clinical Psychology program, Dr. Ward has expertise in humanistic psychology and works to understand and incorporate the role of personality and environmental factors on behavior and emotions. Dr. Ward is a member of the PA Psychological Association.  

Holly Gastgeb, Ph.D.

Holly Gastgeb, Ph.D. is a clinical and developmental psychologist who is licensed in PA. She is a graduate of the University of Pittsburgh, with over 10 years of experience diagnosing, assessing, designing and implementing interventions, and conducting research with individuals with autism spectrum disorder (ASD) from toddlerhood through adulthood.

Dr. Gastgeb is the licensed clinical psychologist for the Pitt Early Autism Study at the University of Pittsburgh and performs assessments for the Autism & Development Disorders Inpatient Research Collaborative (ADDIRC) Pittsburgh site at Western Psychiatric Institute and Clinic. She has presented her research at 14 national and international autism and child development conferences and published 9 research articles in top peer-reviewed journals.

Dr. Gastgeb is also the CEO of Rufus Robot, Inc., a virtual company that makes mobile applications for children with ASD and other learning differences.

Dr. Gastgeb provides psychological assessment services from early childhood to college age, including evaluations for ADHD, learning disabilities, and other emotional and behavioral difficulties. She also specializes in early diagnosis of ASD in infants and toddlers and adult ASD evaluations/diagnosis.

Dr. Gastgeb is a member of the American Psychological Association, Pennsylvania Psychological Association, International Society for Autism Research, and the Society for Research in Child Development.

Katie Stahler, Psy.D.

Katie Stahler is a PA licensed psychologist and certified school psychologist.  She is a graduate from Duquesne University, where she earned her M.S.Ed. in Child Psychology and Psy.D. in School Psychology.  Dr. Stahler has experience working with preschoolers, children, adolescents, and young adults who are experiencing behavioral or emotional challenges.  Current services provided include behavioral consultation, parent training, and individual or family therapy.  Dr. Stahler also completes evaluations, including initial testing and diagnostics, psychoeducational, independent education evaluations, and BHRS (wraparound). 

With a wide range of experience with children and their families, Dr. Stahler is particularly skilled at working with individuals presenting with challenging behaviors and dysregulated emotions.  Her areas of experience include Autism Spectrum Disorder, Attention Deficit Hyperactivity Disorder, Obsessive Compulsive Disorder, Oppositional Defiant Disorder, and Anxiety Disorders.  She utilizes an integrated therapeutic approach, including Cognitive Behavioral Therapy, mindfulness, and behavioral techniques.  Dr. Stahler belongs to the American Psychological Association and the Pennsylvania Psychological Association.

Laura Artman, PhD, CRC

Laura Artman, PhD, CRC is a licensed psychologist and a certified rehabilitation counselor. She obtained a Bachelor of Science degree in Psychology with minors in Business and Women's Studies at Penn State University.  Dr. Artman completed her Master's Degree in Rehabilitation Counseling and Doctorate in Counseling Psychology at West Virginia University.  During her internship at Oak Forest Hospital of Cook County, she practiced general psychotherapy in a community mental health setting and rehabilitation psychology in an inpatient rehabilitation hospital, with an emphasis on spinal cord injury and traumatic brain injury (TBI) for underserved populations on Chicago's south side.  Dr. Artman gained further specialization in TBI on her fellowship at the TBI Model Systems at Virginia Commonwealth University.  Work experience prior to AIBDT includes outpatient neuropsychological assessment and psychotherapy in Moon Township, and outpatient neuropsychological assessment in private practice/inpatient consultation at a Level I Trauma Center/Rehabilitation hospital in Langhorne, PA.  Areas of specialization include neuropsychological assessment in adolescents and adults with brain injury, stroke, late effects of chemotherapy/radiation, multiple sclerosis, Parkinson's disease, seizure disorders, cardiac conditions, and dementia, among others.  She also sees psychotherapy clients with TBI/Concussion and other neurological disorders.


Bryson Bresnahan, Ph.D.

Bryson Bresnahan, Ph.D., is a PA Licensed Psychologist and Certified School Psychologist. He graduated from Duquesne University in 2006, but began therapeutic work in 1997. Dr. Bresnahan has both experiences in clinical and school settings as a therapist through WPIC, an evaluator for Auberle Child Services, and as the Supervisor of Psychological Services for the Pittsburgh Public Schools. Dr. Bresnahan was also an adjunct instructor for psychologist testing (Duquesne University) for 10 years.

Currently, Dr. Bresnahan provides psychological assessment services from early childhood to college age. Evaluations include diagnostic services for Autism, learning disabilities, ADHD, mood disorders, anxiety, and trauma. Dr. Bresnahan has a particular interest in how traumatic experiences impact different populations, as well as how reading difficulties influence attention and anxiety conditions.

Dr.  Bresnahan is currently a member of the PA Psychological Association and the Association of School Psychologists of Pennsylvania.

Email:  [email protected] 

Meghan Eberle, Psy.D.

Meghan Eberle, Psy.D. is a clinical psychologist licensed in the state of Pennsylvania.  A graduate of Wittenberg University (B.A.) and Xavier University (Psy.D.), Dr. Eberle is a child psychologist who specializes in the assessment and treatment of children and adolescents with a history of trauma.  She is a certified Trauma Focused Cognitive Behavioral Therapy (TF-CBT) provider and one of an elite group of TF-CBT certified trainers.  Dr. Eberle specializes in working with children and teens with a history of sexual abuse, physical abuse, witness to domestic or community violence, medical trauma, and/or accident related traumas.  She also has special interests in providing diagnostic assessments and BHRS evaluations.
She was also an integral part in developing an embedded psychologist position within CHP's Divisions of Hematology, Oncology, and Bone Marrow Transplant, where she worked for three years before transitioning to a Lead Psychologist position.  Previous to her employment at CHP, Dr. Eberle worked for 9 years at Allegheny General Hospital's (AGH) Center for Traumatic Stress in Children and Adolescents as a Clinical Psychologist and Instructor of Psychiatry (Drexel Medical School).  She worked closely with two of the three developers of TF-CBT and was a treatment provider in many grant-funded research projects.  She was also the primary provider of supervision and teaching of trauma-informed care to AGH's psychology interns, psychiatry residents, and psychiatry fellows.

Sarah B. Bartko, MS, NCC, LPC

Sarah B. Bartko, MS, NCC, LPC is a licensed professional counselor who specializes in therapy with children, adolescents, and adults. Her expertise is in autism spectrum, tic disorders, behavior modification, parent training, and women's issues. Sarah has specialty training in Perinatal/Postpartum Depression and maternal/infant attachment.  She offers an Interpersonal Therapy program for mothers with perinatal depression and holds specialty interest in supporting women struggling with motherhood adjustment.

Sarah is certified from the Behavior Therapy Institute (BTTI) for specialty treatment in Tourette's Disorder as well as in Obsessive Compulsive Disorder (OCD).

Deborah Volek, MS, LPC

Deborah Volek, MS, LPC is a licensed professional counselor who specializes in counseling for adolescents, adults, and couples. She has a special interest in Christian counseling, as well as mood and anxiety disorders.

Email: [email protected]

Libreta Turner, MS, NCC, LPC

Libreta Turner, MS, NCC, LPC is a licensed professional counselor who specializes in therapy for children, adolescents, and adults with expertise in the treatment of obsessive compulsive disorder, including treatment of OCD in children with autism.

She has over 3 years of experience with the OCD Intensive Outpatient Program at Western Psychiatric Institute & Clinic and has completed in-depth training workshops with the IOCDF Training Institute (BTTI) and the Beck Institute for cognitive behavioral therapy. In addition, she has experience with treatment of focused repetitive behaviors, behavior modification, emotion regulation and anxiety disorders.

Tammie Barkus, LCSW

Tammie Barkus, LCSW is a licensed clinical social worker and certified drug and alcohol counselor. She specializes in therapy for children, adolescents and adults.

Tammie has over 10 years of experience in autism spectrum disorders, ADHD, anxiety, depression, mood disorders and dual-diagnosis. She has had advanced training in functional behavior assessment and is proficient with the development and implementation of behavioral interventions.

Daniella Parrish, MSCP, LPC, LBS 

Daniella Parrish, MSCP, LPC, LBS is a licensed professional counselor and a licensed behavioral specialist. She has expertise in providing therapy services from early childhood to adults, including individual as well as couples and family therapy.

She has over 5 years of experience in autism spectrum disorders, intellectual disability disorder, ADHD, anxiety, depression, mood disorders, oppositional defiance, disruptive behaviors and group therapy. She has had training in functional behavior assessment and applied behavioral analysis. She has extensive experience with the development and implementation of behavioral interventions, as well as providing parent training for improving behavioral management strategies.

Amit Fenton, MS, LPC, NCC

Amit Fenton, MS, LPC, NCC is a licensed professional counselor who has expertise in working with children, adolescents, and adults who possess a wide range of needs and strengths. These include autism spectrum disorders, ADHD, anxiety, depression, OCD, trauma, grief and loss, and family relationships.

Amit has been providing individual and family therapy for over 8 years across multiple settings and has a strong interest in helping individuals fulfill their goals and reach their full potential.

Megan P. Flinchbaugh, MS, NCC, LPC

Megan P. Flinchbaugh MS, NCC, LPC is a licensed professional counselor who specializes in the treatment of adults, adolescents, and children with a strong background in Trauma, Anxiety Disorders, Depression, ADHD, and defiant disorders in children. Megan is trained in Trauma-Focused Cognitive Behavioral Therapy and has utilized a number of treatment modalities including CBT, Mindfulness, and behavior modification techniques. She also works with families and parenting support issues to assist with managing child behavioral problems.

Megan graduated with a masters from Edinboro University and spent six years working in the field of wraparound with families and as a counselor for an intensive summer program for children with ADHD. Megan enjoys working with individuals, families, and couples and takes a hands on approach to therapy using individualized interventions and materials to meet each client's needs.

Jaimie L. Parker, MS, NCC, LPC, CPRP

Jaimie Parker, MS, NCC, LPC, CPRP, is a licensed professional counselor with over 10 years of experience in the mental health field. A graduate from the University of Pittsburgh and Carlow University, Jaimie worked at Western Psychiatric Institute and Clinic for more than 7 years, working with a diverse demographic. Jaimie provides therapy for children, adolescents, and adults in individual, family, and couples counseling sessions. 

Jaimie utilizes Cognitive Behavioral Therapy, Dialectical Behavioral Therapy, and Mindfulness skills to assist client's in their therapeutic journey.  Jaimie specializes in clients coping with mood and anxiety disorders, PTSD, ADHD, eating disorders, life transitions, and chronic mental illness. 

Robert Ryan, MSCP LPC NCC

Robert Ryan, MSCP, LPC, NCC is a licensed professional counselor who specializes in the treatment of children, adolescents, and families. Robert earned his Master of Science in Counseling Psychology from Chatham University and attended Penn State University for his undergraduate studies in psychology.  

His expertise is in trauma, mood disorders, disruptive behavior, and anxiety. Robert is certified in Trauma-Focused CBT and has utilized a number of therapeutic modalities including traditional CBT, Mindfulness Therapy, and Play Therapy. More recently, Robert has developed a therapeutic curriculum for children that will be utilized in five intensive outpatient clinics within the next three years.

Robert has worked in tandem alongside psychiatrists, as well as, other mental health and physical health professionals to better serve his clients within school, residential, and outpatient settings.

Gretchen Jean Boehm, MS, NCC, LPC

Gretchen is a licensed professional counselor who is also distance counseling certified.


Gretchen received her undergraduate degree in psychology at Edinboro University and went on to complete her graduate work at Gannon University where she received her Master’s level training in Community Counseling. 


Specialties include working with children, adolescents, adults and families to improve areas concerning anxiety, depression, improving relationships with formal and informal supports, parent education, behavior modification, self-image, and family systems work.


Gretchen has over 15 years of experience within the helping field and shares a well-rounded approach to her counseling style due to her multi-faceted work including:  partial hospitalization, residential treatment, wrap-around, therapeutic recreation, school-based therapy, multi-systemic therapy, family based, outpatient and private practice.

Heather Massolini, MS, LPC, NCC

Heather Massolini, MS, LPC, NCC has had over 15 years of experience working with children in a wide variety of settings including residential treatment, wraparound and outpatient.  Heather’s clinical interests include trauma, anxiety, depression, transitional issues and mood disorders.  She received her undergraduate degree from Duquesne University in Psychology and Studio art and then received a Master’s of Science in Professional Counseling from Carlow University.  She uses person centered talk/play therapy and incorporates traditional modalities of therapy including CBT and DBT to develop an individualized and eclectic therapeutic approach to treatment. 

Email: [email protected]

Lindsay Motts, MSEd, LPC, LBS

Lindsay Motts is a licensed professional counselor and licensed behavior specialist who specializes in the treatment of adolescents, children and adults. Lindsay additionally specializes in the treatment of Autism Spectrum Disorders,Trauma, Depression, Anxiety, ADHD, and conduct disorders in children. As a therapist, Lindsay utilizes CBT, DBT, mindfulness, and person centered techniques to support client needs. 

Lindsay graduated with a master's degree in Counselor Education at Duquesne University. Lindsay has over 6 years in the mental health field across home, school and community settings. Lindsay is certified in functional behavior analysis and implementing behavior modification interventions to support client needs. 

                                                                                              Email:  [email protected]
Jill Pawlowski, LPC

Jill Pawlowski is a Licensed Professional Counselor with a BA in Psychology from Point Park University and a Master's degree in Counselor Education with a concentration in Marriage and Family Therapy.  Jill has over 20 years of experience in the mental health field with MDD, Schizophrenia, Bipolar Disorder, Family Systems and Couples Counseling, and Developmental Disabilities.

Michelle Toth, MS, LPC

As a Licensed Professional Counselor, Michelle supports and guides individuals, children, adolescents, teens and families through personal hardships. Michelle offers a warm, safe and compassionate environment, and tends to be very person-centered in her counseling approach but also uses Solution-Focused and Cognitive Behavioral Therapy approaches. Michelle believes caregivers are the experts in providing insight into their family and simply bringing light to their own expertise.


In family therapy with children, Michelle offers sessions individually with the child in conjunction with individual sessions with caregivers and together as a family. Michelle has been working with children and families for 15 years and specializes in behavior modification, ADHD, adjustment, domestic adoption/foster care and general family disruption. Michelle has 8 years of experience in the public school setting and is comfortable in guiding families through various school challenges they may be facing with their child.


Michelle works with children with dual diagnoses, trauma and grief and loss issues.  She believes we all have the ability to overcome struggles and lead a satisfying life. Michelle's ultimate goal is to ignite the power in her clients to be life-long problem solvers, overcomers and masters of their own destinies. 

Heidi Stelzig, MSEd., LPC

Heidi Stelzig, LPC is a Licensed Professional Counselor who earned her Master's Degree in Clinical Counseling from the University of Dayton.  She earned her Bachelor's Degree in Psychology from Otterbein College and started her academic accomplishments by earning and Associate's Degree in Mental Health/Chemical Dependency/Mental Retardation from Columbus State Community College.

Ms. Stelzig has been in the counseling profession for 23 years.  Her clinical experiences include individual and group work with children, adults, couples and families.  She has extensive experience in treating children and adults in a variety of settings including Outpatient Private Practice, Behavioral Health Rehabilitative Services, Foster Care, Juvenile Correctional Facilities, Group Homes, Partial Hospitalization, and Intensive Care.

Ms. Stelzig offers client-centered and cognitive behavioral therapy to adults.  In her work with children, she utilizes the relationship, play therapy, behavior modification, and partnering with parents to help children overcome behaviors, thoughts, and emotions that interfere with emotional, social, and academic functioning.  Her focus with parents includes offering emotional support and the teaching of positive parenting skills.  Parents may be requested to join in the play which will enable them to learn esteem enhancing techniques and ultimately help sustain their child's growth.  Active participation between sessions often aids children and families to reach optimal growth and success.  Therefore, "homework" may be assigned and celebrated.  Ms. Stelzig believes that children are best served by their team of family and professionals.  To that end, collaboration is key.

Email: [email protected]

Brittney N. Mendiola, MS, LPC

Brittney N. Mendiola, MS, LPC is a licensed professional counselor who specializes in the treatment of young children, adolescents, adults, and families, with an expertise in trauma, behavior modification, parent training, anxiety, depression, and couples/family counseling. She received her undergraduate degree from Duquesne University in Psychology and earned her Masters degree in Professional Counseling from Carlow University.

Brittney is a nationally rostered Child Parent Psychotherapist (CPP), an intervention for children and parents who have experienced trauma. Brittney enjoys utilizing this therapeutic approach to help children and their caregivers work through both shared and individual traumatic experiences in a way that enhances feelings of attachment and strengthens the bond between parent and child. Additionally, Brittney is trained in Parent Child Interaction Therapy (PCIT) and currently working towards certification.

Email: [email protected]

James T. Russell, MS, LPC


James T. Russell, MS, LPC, is a licensed professional counselor who has expertise 

working with children, adolescents, and adults whom have a multitude of needs, strengths, and diverse backgrounds. 


James received his bachelor's degree at the University of Pittsburgh in psychology and philosophy and his master's degree in counseling psychology from Chatham University. 


James has 12+ years of experience in the helping field including mentorship, mental health services in the classroom setting, group and individual drug and alcohol therapy, vocational training support, family-based therapy, and autism support for individuals and families. 


James takes an eclectic client-centered approach to therapy using the following (but not limited to) modalities: eco-systemic structural family therapy, solution-focused therapy, CBT, and mindfulness therapy.  


James understands the importance of having a multicultural mindset while forming a therapeutic alliance with clientele. He is passionate about respectfully helping individuals and families become healthier physically, mentally, and spiritually.

Email: [email protected]

Lisa Wilson, MS, LPC

Lisa Wilson has 15+ years of experience providing individual and family therapy to children, adolescents and adults.  She has provided therapy in the home, community and office settings.  She is a Licensed Professional Counselor.  Her treatment approach incorporates psychodynamic, cognitive behavioral, dialectical behavior, play therapy and interpersonal therapy.  She is trained in Trauma-Focused CBT.  Her areas of clinical expertise include trauma, women's issues, depression, anxiety and personality disorders.   Ms. Wilson also has experience working with Autism Spectrum Disorders and has advanced training in conducting Functional Behavior Assessments (FBA).  She is an FBA trainer for the Bureau of Autism.  She graduated from Elizabethtown College with a bachelor's degree in Social Work.  She completed her Master's degree in Psychology from Penn State University.  

Email: [email protected]

Cassandra Besse, LCSW

Cassandra Besse is a Licensed Clinical Social Worker (LCSW) who specializes in the treatment of OCD and anxiety disorders in children and adolescents. She previously worked at the WPIC Pediatric OCD Intensive Outpatient program where she provided intensive group and outpatient therapy. She has almost 10 years of experience working with children experiencing significant mental health concerns, trauma and abuse, and autism.

Cassandra earned a Bachelor’s degree from University of Manitoba (Winnipeg, Canada) and a Masters in Social Work at the University of North Carolina at Chapel Hill. Cassandra strives to provide an open, safe and nurturing environment where children/adolescents can learn to cope with their symptoms and take control of their own treatment. Cassandra aims to make treatment fun and loves to see children and families make progress. Treatment is goal-oriented, child centered, and individualized. Cassandra has training in Cognitive Behavioral Therapy (CBT), Exposure and Response Prevention Therapy (ERP) and Acceptance and Commitment therapy (ACT).  Cassandra also has training and experience in the treatment of children who have experienced trauma and mood disorders.