Our Evaluation Staff is comprised of neuropsychologists and clinical
psychologists. We use a brain-based model of assessment to produce a
comprehensive profile of an individual's cognitive, academic, and
emotional strengths and weaknesses. This profile is then used to guide
recommendations related to appropriate school placement and classroom
instruction, as well as any interventions that may be needed to support
the individual - including but not limited to further assessment (e.g.,
neurological, psychiatric, genetic, ) medication evaluation, specialized
tutoring, speech/language assessment and/or therapy, occupational evaluation
and/or therapy, psychotherapy, or social skills training. For older students
and adults, the results from testing are also used to help guide decisions
related to college selection, choosing an appropriate college major, and
determining career direction.
Professional Staff
William R. Stixrud, Ph.D., is a clinical neuropsychologist who has been in private practice since 1985. He is also a member of the Adjunct Faculty of the Children's National Medical Center, and he holds a faculty appointment as Assistant Clinical Professor of Psychiatry at the George Washington School of Medicine. He has previously held an appointment at the Georgetown University Medical School, and he has served as a consultant to the Division of Neuropsychology at the National Institutes of Health.
For the past 20 years, Dr. Stixrud has been extensively involved in the training and supervision of psychologists and learning specialists. He is also a frequent lecturer on topics related to neuropsychological assessment, learning and executive disorders, brain development, brain-based learning, motivation, and the effects of stress and sleep deprivation on the brain. He is the author of a book, Plain Talk About Early Education and Development, and he has authored book chapters and/or articles on children with epilepsy, adolescent brain development, self-esteem, homework, and the effects of Transcendental Meditation on students with ADHD. Dr. Stixrud has been quoted often in publications including The New York Times, The Washington Post, Washingtonian, The Wall Street Journal, Business Week, Barron's and Vogue.
Dr. Stixrud holds a doctorate degree in Educational Psychology from the University of Minnesota. He did his pre-doctoral internship in Pediatric and Clinical Psychology at the Children's Hospital of Boston, as a fellow of the Harvard Medical School, and he received his post-doctoral training in Clinical Neuropsychology at the Tufts New England Medical Center. Prior to entering private practice, Dr. Stixrud worked as a staff neuropsychologist at the Children's National Medical Center and the Georgetown University Medical School.
Dr. Robb Mapou is a board-certified clinical neuropsychologist and has been with William Stixrud, Ph.D. and Associates since 1993. He is a nationally-recognized expert on assessment of learning disabilities and ADHD in adults. His 2009 book, Adult Learning Disabilities and ADHD: Research Informed Assessment, published by Oxford University Press, was the first to summarize research on learning disabilities and ADHD in adults and use it to guide neuropsychological assessment. Dr. Mapou has written chapters on adult learning disabilities and ADHD assessment, regularly presents continuing education workshops to professionals on the topic, and recently appeared on a segment of Dr. Dean Edell’s syndicated program, Medical Breakthroughs. In February 2009, he participated in an invited debate at the annual meeting of the International Neuropsychological Society, during which he argued for comprehensive assessment of learning disabilities in adults. Dr Mapou specializes in the evaluation of adolescents and adults with learning disabilities, ADHD, and neurological disorders, such as traumatic brain injury. He can also consult with clients who have already been evaluated, to help determine whether they qualify for accommodations on high-stakes testing (e.g., SAT, ACT, MCAT, LSAT, GRE, GMAT, USMLE, bar examination). Dr. Mapou holds faculty appointments in the Department of Neurology (Psychology) at Georgetown University School of Medicine, and the Departments of Psychiatry and Neurology at the Uniformed Services University of the Health Sciences. He has served on the editorial boards of Neuropsychology, the Journal of the International Neuropsychological Society, and the Journal of Head Trauma Rehabilitation.
Of his new book, Doody's Book Review Service wrote, "This extremely accessible book not only provides a cogent review of the literature, but also delves into the practical aspects of assessing adult ADHD and learning disabilities. For students and experienced clinicians alike, this book offers a valuable learning experience."
See an interivew with Dr. Mapou here. Link courtesy of Health Central
To see a list of Dr. Mapou's Publications and Presentations on Adult Learning Disabilities and ADHD, click here
Adele C. Green, Ph.D., is a licensed psychologist who has been with William Stixrud & Associates since 1994. She specializes in assessing language,
attention, and executive functioning disorders and learning disabilities in children, adolescents and young adults and is equally experienced in evaluating
gifted individuals who are underachievers and/or highly anxious and distressed. She is especially interested in evaluating how language and other information
processing disorders impact on social functioning. With extensive experience in English as a Second Language, she is also interested in the assessment of
bilingual children or children who learned English as a second language and are struggling in school. Prior to earning her doctorate, Dr. Green was involved
in teaching, developing programs and providing teacher training workshops in English-as-a-second language (ESL). From 1985 through 1990, she engaged in university
teaching and research on attention, lateralization, and language processing in native English speakers and/or Spanish/English bilinguals. Following a two-year post
doctoral fellowship (1991-1993) at the Kennedy-Krieger Institute through the Department of Pediatrics at Johns Hopkins Medical School, Dr. Green was a staff
psychologist in the Department of Clinical Neuropsychology at the Kennedy-Krieger Institute during which time she held an adjunct faculty appointment in the
Department of Neurology. Dr. Green has co-authored book chapters and has several published articles on lateralization, attention and language processing in
native English speakers and English/Spanish bilinguals. She is the first author of an ESL textbook and co-author of a textbook in cross cultural communication.
E-mail: AG7366@aol.com
Dr. Lisa A. Martin is a licensed clinical psychologist who has been with the practice since 1996. Dr. Martin
specializes in the neuropsychological evaluation of children with learning disabilities, attention deficit
hyperactivity disorder, and other developmental and emotional concerns. She has worked extensively with
children of all ages in both evaluation and treatment capacities. Dr. Martin also has broad experience in
the assessment of emotional functioning and personality, including projective testing. Dr. Martin received
her undergraduate degree from Vassar College and her doctoral degree from Catholic University. She
completed her internship at the Baltimore V.A. Hospital, where she gained substantial experience in
psychological assessment. In addition to her neuropsychological evaluation work, Dr. Martin maintains a
private practice focused on psychotherapy with children and adolescents. She is particularly interested in
the identification and treatment of anxiety disorders.
Dr. Martin is also the Director of W.O.W! Memory Clinic (working on working memory)
where we are very excited to be offering Cogmed Working Memory Training (CWMT). CWMT is a software-based program
designed to improve attention and working memory skills. This is a program based on strong scientific research
that is done in the convenience of your own home under the supervision of a Cogmed-qualified coach. For more
information, please go to www.cogmed.com or contact Dr. Martin at extension 265.
Dr. Wendy A. Law is a licensed, clinical psychologist who specializes in the assessment of learning disabilities,
attention-deficit/hyperactivity disorder, and neurological disorders in adults. She is particularly interested in
evaluating how emotional and neurological disorders together affect cognitive functioning. In addition to her work
at William Stixrud and Associates, Dr. Law is an assistant professor with the Departments of Medical and Clinical
Psychology and of Psychiatry at the Uniformed Services University of the Health Sciences. She also works in a
private practice conducting psychotherapy with adults who have emotional, behavioral, and cognitive difficulties,
both with and without neurological disorders.
Dr. Patricia H. Papero is a licensed clinical psychologist with extensive experience in pediatric neuropsychology.
Her areas of special interest include children, adolescents and young adults with neurological problems, such as epilepsy
and brain injuries, and children with special developmental needs, including specific learning disorders and more pervasive
developmental disorders. Dr. Papero directed the Neuropsychology Program at Children's National Medical Center for 18
years and is on the medical faculty of the George Washington University School of Medicine. Earlier, Dr. Papero directed
family-oriented mental health services to children with a range of special needs and served on the Psychology Department
faculties of Vanderbilt University Child Study Center and Middle Tennessee State University with specialization in child
clinical and learning disability areas.
Dr. Susan W. Hammond, is a licensed clinical psychologist who has extensive experience working with children and adolescents
with learning disabilities, attention deficit hyperactivity disorder, and emotional and behavioral difficulties. Dr. Hammond
graduated with honors from Wellesley College and received her doctoral degree in clinical psychology from the University of
Delaware. She joined William Stixrud and Associates in 1997, after completing a clinical internship and residency with the
Washington, DC Commission for Mental Health Services. Dr. Hammond specializes in the evaluation of young children, children
with emotional disabilities and gifted youngsters.
Dr. Susan S. Gerson is a licensed
psychologist who specializes in the evaluation and treatment of children and adolescents with learning disabilities, attention
deficit hyperactivity disorder, and other educational concerns. Dr. Gerson joined William R. Stixrud, Ph.D., and Associates
in 1998, after five years of work as a school psychologist in the Prince Georges County Public Schools. In addition, she
completed an internship in the Montgomery County Public school system. Dr. Gerson directed the William R. Stixrud,
Ph.D. Tutoring Services for five years, and she
presently is the Director of Follow-up Services at William R. Stixrud, Ph.D., and Associates.
Her work in Follow-up Services includes parent consultation, support for writing IEP’s and 504 plans, attending school
meetings, conducting classroom observations, and making recommendations regarding school placement.
Dr. Erika Wasserman is a licensed psychologist who specializes in assessment of learning disabilities and attention deficit hyperactivity disorder.
She also has extensive training in pediatric and behavioral psychology. Dr. Wasserman received her doctoral degree in Clinical Child Psychology from the
University of Miami in Coral Gables, Florida. Her internship and postdoctoral fellowship were completed at Children's Memorial Hospital in Chicago,
Illinois, where she specialized in assessment and treatment of children, adolescents, and their families in inpatient and outpatient settings. Dr.
Wasserman then worked for Evanston Northwestern Healthcare conducting neuropsychological evaluations of children and adolescents. Also, while in Chicago,
she designed an aggression prevention program and secured grant funding from Children's Memorial Hospital to implement the program in city public schools.
After several years in Chicago, Dr. Wasserman relocated to Maryland.
Dr. Ellen K. Goldman is a licensed psychologist with extensive experience in psychotherapy and psychological assessment. She has worked in a
variety of school and clinical settings. Dr. Goldman is a graduate of Cornell University and received her Ph.D. from the State University of New York
at Buffalo. She completed a postdoctoral fellowship at the Kennedy Krieger Institute in Baltimore, and subsequently joined the staff there. Her interests
include learning disabilities, attention deficit hyperactivity disorder, and developmental disorders.
Dr. Adam J. Sowa is a licensed clinical psychologist who specializes in the evaluation and treatment of children and adolescents
with learning disabilities, attention deficit hyperactivity disorder, and other developmental issues. Dr. Sowa received his Ph.D. from
Vanderbilt University and completed his internship and post-doctoral training in pediatric psychology at the duPont Hospital for Children,
where he provided services in the ADHD and Disruptive Behavioral Disorders Clinic and the First State School, a school for children with
chronic illnesses. His research interests focus on the effects of individual child development on the development of family systems.
Dr. Kimberly L. Glass is a pediatric neuropsychologist. Her areas of specialized training and interest include
neuropsychological assessment of children who have been adopted (domestic and international) and assessment of specific disorders
including Fetal Alcohol Syndrome (FAS) Fetal Alcohol Exposure (FAE), attention deficit hyperactivity disorder (ADHD), learning
disabilities, and language disorders. Dr. Glass has also had specialized training and experience working with children and adolescents
with acquired or neuro developmental disorders such as autism spectrum disorders and epilepsy. Additionally, Dr. Glass has experience
in emotional assessment including the use of projective testing and is particularly interested in anxiety disorders. Prior to joining
William R. Stixrud, Ph.D. and Associates, Dr. Glass completed a two-year postdoctoral fellowship through the Pediatric Neuropsychology
Program at Children's National Medical Center. She completed her pre-doctoral internship at the University of Minnesota Medical School
with major focus in pediatric neuropsychology and pediatric psychology, including working with the international adoption clinic and the FAS clinic.
Dr. Glass received her doctoral degree through the school psychology program at the University of Texas in Austin. Prior to her doctoral work,
Dr. Glass completed the coursework for the Marriage and Family Therapy master's program at the University of Maryland College Park where she worked
for two years in the Family Service Center providing individual, marital, group and family therapy.
Dr. David Black is a licensed clinical psychologist and pediatric neuropsychologist. He is skilled in the
assessment of a wide range of childhood neurological, psychiatric, developmental, and learning disorders and is an
expert is in the diagnosis and neuropsychological assessment of children with autism spectrum disorders. Dr. Black
is actively doing research with children who have autism spectrum disorders and regularly publishes and presents
his research at professional conferences. Dr. Black received his Ph.D. from George Mason University, and completed
his internship and postdoctoral training at the University of California Los Angeles. He has worked in a variety
of settings including in private practice, specialty clinics, children's hospitals and research settings. He currently
works at the National Institute of Mental Health studying children with autism and related disorders.
Dr. Joette James is a licensed psychologist and pediatric neuropsychologist. She was a pre-doctoral intern at Boston Children’s Hospital and completed a two-year post-doctoral specialization in pediatric neuropsychology at Children’s National Medical Center, where she has served as a faculty member since 2006. In addition, Dr. James is currently the inpatient neuropsychology consultant at HSC Pediatric Center, a sub-acute rehabilitation facility. Clinically, her area of specialization is in the diagnosis and neuropsychological assessment of children and adolescents with Autism Spectrum Disorders, and she has obtained research reliability on both the Autism Diagnostic Observations Schedule (ADOS) and the Autism Diagnostic Interview- Revised (ADI-R). Dr. James’ research interests include executive-functioning in individuals with high-functioning Autism and Asperger's Syndrome and the development of psychosocial interventions for this population. She also has extensive experience in the neuropsychological evaluation of children and adolescents with specific learning disorders, Attention-Deficit/Hyperactivity Disorder, executive functioning problems, and neurological disorders such as brain injuries and epilepsy. In her leisure time, Dr. James is an avid traveler, art collector and film buff!
Dr. Katia Fredriksen is a licensed clinical psychologist and developmental neuropsychologist who specializes in the evaluation of children, adolescents, and college students with autism spectrum disorders, learning disabilities, ADHD/ADD, cognitive disabilities, and emotional and social challenges. Her aim is to obtain a full understanding of the individual’s learning, behavior, and developmental trajectory via
comprehensive evaluation with an emphasis on continuity of care. Dr. Fredriksen has worked in a variety of outpatient and inpatient settings, and her training and professional background includes research,
psychotherapy, and psychological, neuropsychological, and multi-disciplinary assessment. She has also attended school meetings, completed program evaluations, made presentations to parent groups, and participated as an expert witness. Dr. Fredriksen obtained her B.A. from Princeton University in Psychology and French, and her Ph.D. from the University of Massachusetts Boston in Clinical Psychology. She completed her pre-doctoral internship at the Cambridge Health Alliance in Boston, MA, followed by two years of post-doctoral training in pediatric neuropsychology at the Children’s Evaluation Center and the Integrated Center for Child Development, located in the Boston area.
Administrative Staff
Starr Stixrud, M.Ed., Administrative Director, Client Care Manager
Starr joined the practice in September, 1990 after a fifteen year career in early childhood education. During her career
as an educator, she worked as a classroom teacher, provided extensive staff training and development, and conducted
weekly parent education seminars. She earned a B.A. from Southern Illinois University, a M.Ed. from the
University of Washington in Early Childhood Special Education, and a specialist certification in Early Childhood
Education from the Institute of Childhood Development at the University of Minnesota. She also participated in a
two-year graduate program in the Applied Healing Arts through the Tai Sophia Institute. She has been married
for over 30 years to Dr. William Stixrud, and they have two grown children. In her spare time, among her
diverse interests, she maintains a daily meditation and yoga practice, cooks, knits, and is an avid reader.
Elaine D. Book, M.Ed., Client Care Manager, received her B.A. from the University of Maryland in social work,
a M.Ed. from Loyola University in special education, and a second M.Ed. in special education from Kansas State
University. Her background includes five years as a special education teacher in Topeka, Kansas, and five years
as an educational diagnostician in the Topeka school system, followed by seven years as an educational diagnostician
with Psychiatric Institute, Bethesda, MD. She has been with our practice since then, and serves a dual function as
an intake specialist and a clinical assistant.
Brooke Zeller, Client Care Manager
Brooke graduated with a B.A. in psychology from Nazareth College in Rochester, NY in 2003. She then moved to Northern Virginia where she worked as a classroom teacher for two years, before becoming the Assistant Director of Learning at the Knowledge Learning Corporation in Fairfax, VA. After spending three years working in this capacity, she decided to go back to school and earned an M. Ed in Educational Psychology from George Mason Unversity. Upon graduating, Brooke accepted a position as a Psychology Associate at William R. Stixrud, Ph.D & Associates. In addition to her clinical responsibilities, Brooke also serves as one of three Client Care Managers.
Altah O. Glasgow, Director of Tutoring Services
Altah has been with William R. Stixrud, Ph.D. and Associates for seven years. She began as a Stixrud
tutor and still maintains a small part-time practice helping children with reading, math, writing, and
executive function issues. In 2005, Altah accepted a part-time position as Education and Outreach
Program Coordinator at the Stixrud office.
Altah has been the full time Director of Tutoring Services for the past two years and enjoys helping
clients find the best tutor for their needs.
Carol K Mannix, M.A. is a psychology associate who works primarily with children and adolescents. She
received her B.S. from Radford University in psychology, and a master's degree in clinical psychology from
the American School of Professional Psychology in Virginia. Prior to coming to William R. Stixrud, Ph.D.,
& Associates, she worked at the Northern Virginia Training Center assessing and developing behavioral
treatment programs for individuals who have severe and profound mental retardation. Carol has completed the
William R. Stixrud, Ph.D. Tutoring Services "Strategies That Work" Tutor Training Program, and is a certified
Phono-Graphix and Read Naturally tutor. She has been with William R. Stixrud, Ph.D., & Associates since
2001 and has several roles: first, she serves as a facilitator for the psychology associates, which includes
their training; second, she tests clients; third, she maintains a tutoring practice; and fourth, she is a
qualified Cogmed coach.
Johanna M. Smith, M.A. received her B.S. in psychology from James Madison University in 2003 and her M.A. in psychology from American University in 2005. While at AU, she worked as a member of the residential staff at the Regional Institute for Children & Adolescents (RICA) in Rockville, MD and volunteered as a Research Coordinator at the Donald Delaney Eating Disorders Clinic at the Children’s National Medical Center in Washington, DC. Upon graduating, she worked for two years as a Research Associate at the American Institutes for Research in Washington, DC where she received specialized training in the Facial Action Coding System (FACS) and developed training materials and assessments for the government, before joining the Stixrud practice as a Psychology Associate. Johanna has completed the William R. Stixrud, Ph.D. Tutoring Services "Strategies That Work" Tutor Training Program and is a certified Read Naturally tutor. In addition to her testing and clinical responsibilities here, Johanna maintains her own tutoring practice, serves as a facilitator among the psychology associates, and is responsible for preparing insurance pre-certifications.
WILLIAM STIXRUD, PH.D., & ASSOCIATES
8720 Georgia Avenue, Suite 300 - Silver Spring, MD 20910
Phone 301-565-0534 | Fax 301-565-2217
Adele C. Green, Ph.D., is a licensed psychologist who has been with William Stixrud & Associates since 1994. She specializes in assessing language,
attention, and executive functioning disorders and learning disabilities in children, adolescents and young adults and is equally experienced in evaluating
gifted individuals who are underachievers and/or highly anxious and distressed. She is especially interested in evaluating how language and other information
processing disorders impact on social functioning. With extensive experience in English as a Second Language, she is also interested in the assessment of
bilingual children or children who learned English as a second language and are struggling in school. Prior to earning her doctorate, Dr. Green was involved
in teaching, developing programs and providing teacher training workshops in English-as-a-second language (ESL). From 1985 through 1990, she engaged in university
teaching and research on attention, lateralization, and language processing in native English speakers and/or Spanish/English bilinguals. Following a two-year post
doctoral fellowship (1991-1993) at the Kennedy-Krieger Institute through the Department of Pediatrics at Johns Hopkins Medical School, Dr. Green was a staff
psychologist in the Department of Clinical Neuropsychology at the Kennedy-Krieger Institute during which time she held an adjunct faculty appointment in the
Department of Neurology. Dr. Green has co-authored book chapters and has several published articles on lateralization, attention and language processing in
native English speakers and English/Spanish bilinguals. She is the first author of an ESL textbook and co-author of a textbook in cross cultural communication.
Dr. Lisa A. Martin is a licensed clinical psychologist who has been with the practice since 1996. Dr. Martin
specializes in the neuropsychological evaluation of children with learning disabilities, attention deficit
hyperactivity disorder, and other developmental and emotional concerns. She has worked extensively with
children of all ages in both evaluation and treatment capacities. Dr. Martin also has broad experience in
the assessment of emotional functioning and personality, including projective testing. Dr. Martin received
her undergraduate degree from Vassar College and her doctoral degree from Catholic University. She
completed her internship at the Baltimore V.A. Hospital, where she gained substantial experience in
psychological assessment. In addition to her neuropsychological evaluation work, Dr. Martin maintains a
private practice focused on psychotherapy with children and adolescents. She is particularly interested in
the identification and treatment of anxiety disorders.
Dr. Patricia H. Papero is a licensed clinical psychologist with extensive experience in pediatric neuropsychology.
Her areas of special interest include children, adolescents and young adults with neurological problems, such as epilepsy
and brain injuries, and children with special developmental needs, including specific learning disorders and more pervasive
developmental disorders. Dr. Papero directed the Neuropsychology Program at Children's National Medical Center for 18
years and is on the medical faculty of the George Washington University School of Medicine. Earlier, Dr. Papero directed
family-oriented mental health services to children with a range of special needs and served on the Psychology Department
faculties of Vanderbilt University Child Study Center and Middle Tennessee State University with specialization in child
clinical and learning disability areas.
Dr. Susan W. Hammond, is a licensed clinical psychologist who has extensive experience working with children and adolescents
with learning disabilities, attention deficit hyperactivity disorder, and emotional and behavioral difficulties. Dr. Hammond
graduated with honors from Wellesley College and received her doctoral degree in clinical psychology from the University of
Delaware. She joined William Stixrud and Associates in 1997, after completing a clinical internship and residency with the
Washington, DC Commission for Mental Health Services. Dr. Hammond specializes in the evaluation of young children, children
with emotional disabilities and gifted youngsters.
Dr. Susan S. Gerson 
Dr. Erika Wasserman is a licensed psychologist who specializes in assessment of learning disabilities and attention deficit hyperactivity disorder.
She also has extensive training in pediatric and behavioral psychology. Dr. Wasserman received her doctoral degree in Clinical Child Psychology from the
University of Miami in Coral Gables, Florida. Her internship and postdoctoral fellowship were completed at Children's Memorial Hospital in Chicago,
Illinois, where she specialized in assessment and treatment of children, adolescents, and their families in inpatient and outpatient settings. Dr.
Wasserman then worked for Evanston Northwestern Healthcare conducting neuropsychological evaluations of children and adolescents. Also, while in Chicago,
she designed an aggression prevention program and secured grant funding from Children's Memorial Hospital to implement the program in city public schools.
After several years in Chicago, Dr. Wasserman relocated to Maryland.
Dr. Ellen K. Goldman is a licensed psychologist with extensive experience in psychotherapy and psychological assessment. She has worked in a
variety of school and clinical settings. Dr. Goldman is a graduate of Cornell University and received her Ph.D. from the State University of New York
at Buffalo. She completed a postdoctoral fellowship at the Kennedy Krieger Institute in Baltimore, and subsequently joined the staff there. Her interests
include learning disabilities, attention deficit hyperactivity disorder, and developmental disorders.
Dr. Adam J. Sowa is a licensed clinical psychologist who specializes in the evaluation and treatment of children and adolescents
with learning disabilities, attention deficit hyperactivity disorder, and other developmental issues. Dr. Sowa received his Ph.D. from
Vanderbilt University and completed his internship and post-doctoral training in pediatric psychology at the duPont Hospital for Children,
where he provided services in the ADHD and Disruptive Behavioral Disorders Clinic and the First State School, a school for children with
chronic illnesses. His research interests focus on the effects of individual child development on the development of family systems.
Dr. Kimberly L. Glass is a pediatric neuropsychologist. Her areas of specialized training and interest include
neuropsychological assessment of children who have been adopted (domestic and international) and assessment of specific disorders
including Fetal Alcohol Syndrome (FAS) Fetal Alcohol Exposure (FAE), attention deficit hyperactivity disorder (ADHD), learning
disabilities, and language disorders. Dr. Glass has also had specialized training and experience working with children and adolescents
with acquired or neuro developmental disorders such as autism spectrum disorders and epilepsy. Additionally, Dr. Glass has experience
in emotional assessment including the use of projective testing and is particularly interested in anxiety disorders. Prior to joining
William R. Stixrud, Ph.D. and Associates, Dr. Glass completed a two-year postdoctoral fellowship through the Pediatric Neuropsychology
Program at Children's National Medical Center. She completed her pre-doctoral internship at the University of Minnesota Medical School
with major focus in pediatric neuropsychology and pediatric psychology, including working with the international adoption clinic and the FAS clinic.
Dr. Glass received her doctoral degree through the school psychology program at the University of Texas in Austin. Prior to her doctoral work,
Dr. Glass completed the coursework for the Marriage and Family Therapy master's program at the University of Maryland College Park where she worked
for two years in the Family Service Center providing individual, marital, group and family therapy.
Dr. David Black is a licensed clinical psychologist and pediatric neuropsychologist. He is skilled in the
assessment of a wide range of childhood neurological, psychiatric, developmental, and learning disorders and is an
expert is in the diagnosis and neuropsychological assessment of children with autism spectrum disorders. Dr. Black
is actively doing research with children who have autism spectrum disorders and regularly publishes and presents
his research at professional conferences. Dr. Black received his Ph.D. from George Mason University, and completed
his internship and postdoctoral training at the University of California Los Angeles. He has worked in a variety
of settings including in private practice, specialty clinics, children's hospitals and research settings. He currently
works at the National Institute of Mental Health studying children with autism and related disorders.
Dr. Joette James is a licensed psychologist and pediatric neuropsychologist. She was a pre-doctoral intern at Boston Children’s Hospital and completed a two-year post-doctoral specialization in pediatric neuropsychology at Children’s National Medical Center, where she has served as a faculty member since 2006. In addition, Dr. James is currently the inpatient neuropsychology consultant at HSC Pediatric Center, a sub-acute rehabilitation facility. Clinically, her area of specialization is in the diagnosis and neuropsychological assessment of children and adolescents with Autism Spectrum Disorders, and she has obtained research reliability on both the Autism Diagnostic Observations Schedule (ADOS) and the Autism Diagnostic Interview- Revised (ADI-R). Dr. James’ research interests include executive-functioning in individuals with high-functioning Autism and Asperger's Syndrome and the development of psychosocial interventions for this population. She also has extensive experience in the neuropsychological evaluation of children and adolescents with specific learning disorders, Attention-Deficit/Hyperactivity Disorder, executive functioning problems, and neurological disorders such as brain injuries and epilepsy. In her leisure time, Dr. James is an avid traveler, art collector and film buff!
neuropsychologist who specializes in the evaluation of children, adolescents, and college students with autism spectrum disorders, learning disabilities, ADHD/ADD, cognitive disabilities, and emotional and social challenges. Her aim is to obtain a full understanding of the individual’s learning, behavior, and developmental trajectory via
Starr Stixrud, M.Ed., Administrative Director, Client Care Manager
Elaine D. Book, M.Ed., Client Care Manager, received her B.A. from the University of Maryland in social work,
a M.Ed. from Loyola University in special education, and a second M.Ed. in special education from Kansas State
University. Her background includes five years as a special education teacher in Topeka, Kansas, and five years
as an educational diagnostician in the Topeka school system, followed by seven years as an educational diagnostician
with Psychiatric Institute, Bethesda, MD. She has been with our practice since then, and serves a dual function as
an intake specialist and a clinical assistant.
Altah O. Glasgow, Director of Tutoring Services
Carol K Mannix, M.A. is a psychology associate who works primarily with children and adolescents. She
received her B.S. from Radford University in psychology, and a master's degree in clinical psychology from
the American School of Professional Psychology in Virginia. Prior to coming to William R. Stixrud, Ph.D.,
& Associates, she worked at the Northern Virginia Training Center assessing and developing behavioral
treatment programs for individuals who have severe and profound mental retardation. Carol has completed the
William R. Stixrud, Ph.D. Tutoring Services "Strategies That Work" Tutor Training Program, and is a certified
Phono-Graphix and Read Naturally tutor. She has been with William R. Stixrud, Ph.D., & Associates since
2001 and has several roles: first, she serves as a facilitator for the psychology associates, which includes
their training; second, she tests clients; third, she maintains a tutoring practice; and fourth, she is a
qualified 
Johanna M. Smith, M.A. received her B.S. in psychology from James Madison University in 2003 and her M.A. in psychology from American University in 2005. While at AU, she worked as a member of the residential staff at the Regional Institute for Children & Adolescents (RICA) in Rockville, MD and volunteered as a Research Coordinator at the Donald Delaney Eating Disorders Clinic at the Children’s National Medical Center in Washington, DC. Upon graduating, she worked for two years as a Research Associate at the American Institutes for Research in Washington, DC where she received specialized training in the Facial Action Coding System (FACS) and developed training materials and assessments for the government, before joining the Stixrud practice as a Psychology Associate. Johanna has completed the William R. Stixrud, Ph.D. Tutoring Services "Strategies That Work" Tutor Training Program and is a certified Read Naturally tutor. In addition to her testing and clinical responsibilities here, Johanna maintains her own tutoring practice, serves as a facilitator among the psychology associates, and is responsible for preparing insurance pre-certifications.