About Us
Karen M. Falla, Ph.D.
Licensed Psychologist
Clinical Neuropsychologist
Child, Adolescent, Adult, Geriatric

Dr. Falla founded Neuropsychology Consultants with a vision of bringing together outstanding clinicians offering state-of-the-art evaluation and treatment in the fields of clinical psychology and neuropsychology. She is a licensed psychologist with a specialization in Clinical Neuropsychology, focusing on the evaluation and treatment of individuals across the developmental lifespan who are experiencing cognitive, emotional, social, or behavioral difficulties. She provides services to individuals in the office on an outpatient basis and also on an inpatient basis at the Medical Center of McKinney.

In working with children and adolescents, Dr. Falla helps to enhance understanding of their functioning in several domains. With consideration of their strengths and weaknesses, she works with parents to develop a plan of intervention to help the child or adolescent fulfill their potential in multiple domains of life. Typical referral issues include ADHD, learning disabilities, Autism Spectrum Disorder, other neurodevelopmental problems, and traumatic brain injury. She also helps with emotional difficulties, including depression, anxiety, bipolar disorder, and adjustment disorder.

In working with adults, she assists with differential diagnosis of dementia and other neurologically based problems. Typical referral issues include Alzheimerís disease, Lewy body dementia, Frontotemporal dementia, Vascular dementia due to major stroke or microvascular disease, Parkinsonís disease, multiple sclerosis, brain tumor, seizure disorder, and traumatic brain injury.  She works with individuals and families to help them work toward positive emotional adaptation to life changes associated with a family memberís decline in cognitive or physical functioning.  She treats her patients with compassion and respect as they seek to understand the basis of problems they are experiencing, and discusses with them practical and accessible ways of improving their quality of life.

Dr. Falla earned her doctorate in Clinical Psychology (APA-accredited) and her masterís degree in Psychology from the University of North Texas. She earned her bachelor's degree in Psychology from Arizona State University, graduating summa cum laude. Prior to this, she earned a bachelorís degree in Computer Science from the College of Engineering and Applied Sciences at Arizona State University. Afterward, she worked for five years as a Software Engineer for Honeywell Commercial Flight Systems, collaborating with systems engineers and hardware engineers to produce flight control (autopilot) systems for commercial aircraft.

As she transitioned her analytical skills into the field of clinical psychology, she evaluated children receiving neuro-oncology services at Cook Childrenís Medical Center in preparing her dissertation, ďThe Relationship between Executive and Psychosocial Functioning in Children Treated for a Brain Tumor.Ē She had a focus on neuropsychological evaluation and treatment of both children and adults during her graduate practice with the Traumatic Brain Injury Program at the Baylor Institute for Rehabilitation in Dallas; Baylor Our Childrenís House in Dallas; and Cook Childrenís Medical Center in Fort Worth.

She furthered her specialized clinical training on internship at the APA-accredited Oklahoma Health Consortium in Oklahoma City (including rotations at the Jim Thorpe Rehabilitation Hospital, Neuropsychology Associates at the Mercy Hospital Neuroscience Institute, and the Child Study Center at the University of Oklahoma Health Sciences Center); and her postdoctoral fellowship in neuropsychology at the Center for Psychological Development in Sherman, Texas, where she conducted in-depth neuropsychological evaluations with both inpatient and outpatient populations. Inpatient settings included acute care, rehabilitation, skilled nursing, and psychiatry.

Dr. Falla currently holds privileges at the Medical Center of McKinney where she sees patients in acute care, rehabilitation, and psychiatric care. She has taught graduate and undergraduate courses at the University of North Texas. She is a member of the American Psychological Association (including Division 40: Division of Clinical Neuropsychology), the National Academy of Neuropsychology, the Texas Psychological Association, and the Collin County Psychological Association.


David F. Lerner, Ph.D.Licensed Psychologist
Clinical Neuropsychologist
Child, Adolescent, Adult, Geriatric

Dr. Lerner has a strong clinical interest in evaluation and treatment of individuals with cognitive, developmental, behavioral, social, and/or emotional difficulties. In addition to his work in our office, he currently holds privileges at the Medical Center of McKinney where he sees patients in acute care, rehabilitation, and psychiatric care. He also provides in-home neuropsychological assessment and psychotherapy for rehabilitation patients through Rehab Without Walls. 

Dr. Lerner earned his doctoral and master's degrees from the APA-accredited program in Educational Psychology at Arizona State University with a concentration in School Psychology. He completed his APA-accredited predoctoral internship at the Illinois School Psychology Internship Consortium where he worked with an ethnically and economically diverse student body. His focus there was on neuropsychological and social emotional evaluation of children and adolescents.

He went on to complete his two-year postdoctoral fellowship in neuropsychology at Neuropsychology Consultants under the supervision of Dr. Karen Falla. During his fellowship, he completed additional intensive training in clinical neuroanatomy and psychopharmacology, and he participated in the resident lecture series at the Baylor Institute for Rehabilitation in Dallas. 

Dr. Lerner had a very unique undergraduate experience. He earned concurrent bachelor's degrees in Asian Languages (Japanese) and Art History at Arizona State University and was a member of the academic honor society Phi Beta Kappa. He worked for two years in the Japanese Exchange and Teaching Program at Yasutomi and Himeji school districts, Hyogo Prefecture, where he taught at Japanese elementary and middle schools. He also taught undergraduate courses in educational psychology and educational technology while a graduate student at Arizona State. He completed his doctoral dissertation entitled The Structure of Cyber-Aggression and his master's thesis entitled Cyberbullying among Japanese and American Middle School Students; he presented the latter at AERA, British Columbia, Canada. He is currently collaborating with a Japanese colleague on a book chapter based on this research which has recently been accepted for publication.

Dr. Lerner's graduate clinical experiences include utilizing applied behavior analysis based interventions for groups of students presenting with extreme attention deficit hyperactive disorder and autism spectrum disorder. Techniques included contingency management with token economies and cognitive behavioral strategies for anxiety reduction. He is a member of the National Academy of Neuropsychology and the American Psychological Association.


Valerie Sive-Ramirez, Psy.D.Licensed Psychologist
Clinical Neuropsychologist
Child, Adolescent, Adult, Geriatric

Dr. Valerie Sive-Ramirez earned her doctoral degree from the APA-accredited counseling psychology graduate program at the University of San Francisco, which included a two-year graduate practicum at the Childrenís Health Council in Palo Alto, California. She received additional training in the diagnosis and treatment of children and adolescents at the APA-approved Southern Arizona Psychology Internship Consortium in Tucson, Arizona. She earned her masterís degree from the University of San Diego and has been licensed as a marriage and family therapist in California. She is currently a licensed psychologist in Texas.

Dr. Sive-Ramirez completed her post-doctoral training in Clinical Neuropsychology from Fielding Graduate University. As part of this specialized training, she completed a post-doctoral fellowship at St. Maryís Medical Center, where she worked on the inpatient rehabilitation unit and conducted inpatient and outpatient neuropsychological evaluations for children and adolescents. She further refined her specialization by completing a second post-doctoral fellowship on the brain injury unit at Kaiser Foundation Rehabilitation Center.

She has worked for the Memory Center at Baylor Neuroscience Center in Dallas as well as for the Pain Management Center at Baylor University Medical Center.  In both settings, she conducted comprehensive neuropsychological evaluations and pain evaluations, provided individual and group therapy, and assisted in coordination of treatment services to gather outcome data. She provides in-home neuropsychological assessment and psychotherapy rehabilitation patients through Rehab Without Walls. She has worked with children with many different types of conditions, including ADHD, learning difficulties, developmental delay, and neurological problems. 

In addition to her clinical experience, she has worked in different research settings, including a study on anger management and substance abuse for the U.S. Department of Veteranís Affairs Medical Center in San Francisco. She served as adjunct faculty for Wright Institute in Berkeley, California teaching graduate-level neuropsychological assessment. She is a member of the American Psychological Association.

Dr. Sive-Ramirez is committed to providing high quality evaluations and treatment.  An important objective in her clinical work is to provide each individual with an opportunity to obtain optimal functioning in daily life.


Katrina E. Belťn, Psy.D.           Licensed Psychologist
           Clinical Neuropsychologist
           Adolescent, Adult, Geriatric

Dr. Belťn is a clinical neuropsychologist who specializes in the cognitive assessment and rehabilitation of individuals of diverse cultural and linguistic backgrounds. Originally from New Mexico, she completed her undergraduate studies at the University of New Mexico and then pursued doctoral training in neuropsychology at Carlos Albizu University in Miami, FL. She completed internship and post-doctoral residency programs at Jackson Memorial Hospital/University of Miami Miller School of Medicine.

Dr. Belťn has been an invited speaker, presenting nationally and internationally, on topics relating to cultural identity, bilingualism, culturally informed rehabilitation, and neuropsychological assessment with non-English speakers. Specific areas of interest include traumatic brain injury, concussion, multiple sclerosis, stroke and dementia. We are very happy to have Dr. Belťn working with us!


Kristen Cline Belloni, Ph.D.           Licensed Psychologist
           Licensed Specialist in School Psychology
           Early Childhood, Child, Adolescent, Adult

Dr. Belloni has a specialized interest in clinical assessment of children with cognitive, emotional or behavioral difficulties and disabilities, with particular interests in neuropsychological evaluation for Autism Spectrum Disorders and ADHD. She served for five years on the Autism Evaluation Team for the Frisco Independent School District and has specialized training using the ADOS-2, considered the gold standard for assessment of autism in young children. She also provided consultation services for teachers, parents, and school staff, and she developed Functional Behavior Assessments and Behavior Intervention Plans. She also has experience working with the Denton ISD and Lewisville ISD as part of her graduate training. Her graduate work also included service at the Denton County Child Advocacy Center where she provided Group and Individual counseling of abused children from 3 years to adolescence, including leading social skills groups, art therapy, play therapy and consulting with parents. She worked for Collin County Juvenile Detention Center where she provided group therapy for incarcerated adolescent boys. She also completed a graduate practicum in our office as part of her doctoral studies in 2008-2009.


Dr. Belloni earned her doctorate at the APA-accredited School Psychology/Neuropsychology program at Texas Woman's University. Her dissertation research is entitled A Confirmatory Factor Analytic Comparison of the Test of Everyday Attention for Children (TEA-Ch). She received her masterís degree in Clinical and Counseling Psychology from Southern Methodist University where she had an emphasis on individual, group, marriage, and career counseling, assessment, conflict resolution, mediation, mental health consulting. She received her bachelorís degree in Interdisciplinary Studies: Psychology, Anthropology, English from the University of North Texas. In addition to her child experience, she is a Medicare provider and has experience with adult assessment, including assessment for dementia.


Dr. Belloni also completed the Dispute Resolution Graduate Certificate Program at Southern Methodist University in which she fulfilled academic certification requirements for recognition as a Mediator, including family and divorce mediation. She went on to work as Adjunct Instructor of the Life Span Development course in the Department of Dispute Resolution and Counseling - Master of Science in Counseling Program at SMU. She has served as Associate Professor at Collin College and as adjunct instructor at Brookhaven Community College.


Dr. Belloni has made multiple presentations across the nation on multiple topics, including Peer Mediation in Schools, Behavioral Management Strategies for the Classroom, Preschool Developmental Screening, Assessing Mathematic Skills: A Summary of Common Mathematic Assessment Instruments, and Evaluation of the Research on the Read Naturally Reading Fluency Intervention, Bullying in Schools, Asperger Social Skills Group Outcome Synopsis, and The Neurology of Huntingtonís Disease. She has also won numerous awards in recognition of her clinical, teaching, and research expertise. We are very happy to have Dr. Belloni working with us!


Leslie N. Perez, Psy.D.           Postdoctoral Fellow
           Clinical Neuropsychology
           Child, Adolescent, Adult, Geriatric

Dr. Perez completed her masters and doctoral degrees in Clinical Psychology from the at the APA-accredited Philadelphia College of Osteopathic Medicine, and her bachelorís degree in Psychology and Biology from Rutgers University. Her dissertation is entitled The Effects of Coping styles and Stress Perceptions on Clinical Outcomes in Individuals with Traumatic Brain Injury in a Post-Acute Rehabilitation Program.


She went on to complete her predoctoral internship at Utah State Hospital, where she conducted neuropsychological assessments with adult, geriatric, pediatric, and forensic patients with diverse co-occurring neuropsychiatric, neurological, medical, and neurodevelopmental disorders. She developed and implemented a cognitive remediation program for adults and conducted individual and group cognitive remediation sessions for pediatric and adult patients with cognitive impairments, and conducted individual therapy using the evidence-based, comprehensive Dialectical Behavior Therapy model. At Utah State Hospital, she presented Dementia and Schizophrenia: Comorbidity and Differential Diagnostics in an Inpatient Setting.


Dr. Perez has worked in a diverse range of clinical settings during her predoctoral training. At Fairmount Behavioral Health System in Philadelphia, PA, she conducted individual therapy sessions for inpatient individuals with schizophrenia spectrum disorders, eating disorders, depression and anxiety, and personality disorders, co-facilitated group therapy sessions using Yalom-style process skills, and worked closely with trauma survivors who had suffered sexual, physical, and psychological trauma.


At Penn Medicine/Lancaster General Hospital, she conducted neuropsychological assessments for individuals referred to the Alzheimerís and Memory Care Program and co-facilitated a weekly stroke support group in the rehabilitation unit and a weekly day treatment support group for individuals with brain injury. She also conducted Spanish-speaking dementia evaluations and collaborated in the development of a Spanish speaking dementia battery intended to more accurately assess Spanish speaking patients using culturally appropriate cognitive measures.


At Temple University Hospital ĖEpiscopal Campus: Extended Acute Care Program she provided individual therapy to individuals with severe mental illness and conducted brief neurocognitive assessments with individuals with neuropsychiatric and neurodegenerative conditions.


At Devereux Foundation, she conducted individual therapy with children and adolescents who had emotional and behavioral disorders and developmental disabilities, including Autism Spectrum Disorder, ADHD, Oppositional Defiant Disorder, depression, anxiety, and self-injurious behaviors. She also participated in research which was presented at the 63rd Annual Meeting of the American Academy of Child and Adolescent Psychiatry.


At Bancroft NeuroRehab, she conducted individual therapy, group therapy, and comprehensive neuropsychological assessments for individuals who had sustained moderate-to-severe brain injury and were receiving treatment at a residential post-acute rehabilitation program. At Cumberland County Guidance Center in South Jersey she conducted initial biopsychosocial assessments, mental status exams, and suicide assessments for new clients, and carried a caseload of English and Spanish speaking children, adolescents, and adults for individual therapy services.


Dr. Perez has affiliations with several professional organizations, including the American Psychological Association, National Academy of Neuropsychology, International Neuropsychological Society, American Academy of Clinical Neuropsychology, Society for Clinical Neuropsychology (APA, Division 40), and Rehabilitation Psychology (APA, Division 22). We are very happy to have her completing her postdoctoral fellowship with us!



We are committed to treating others with compassion and respect as we help them to more fully understand their unique characteristics and support them in seeking experiences that will enhance their quality of life.
6717 W Eldorado Parkway
Suite 110
McKinney, TX 75070

Telephone: 214-585-0584
Fax: 214-585-0586