Welcome to A Change in Trajectory!

A Change in Trajectory (ACT)

is a family-oriented agency that is committed to narrowing the gap between the developmental path of individuals with special needs and individuals with typical development. ACT provides services for infants, children, adolescents, and adults with autism and other related disorders. ACT is equipped with highly professional, courteous staff who are respectful of privacy and are dedicated to the individuals they serve. The operating model of ACT promotes personal growth and positive encouragement for consumers, families, and team members.

All therapeutic services provided by ACT are based on the principles of Applied Behavior Analysis (ABA), the most scientifically-validated approach for changing behavior. The treatment modalities used by ACT are evidence-based practices that range from naturalistic teaching methodologies such as Pivotal Response Training (PRT) to more structured methods such as Discrete Trial Training (DTT). Program development and implementation are data-driven to ensure the best outcome for the individuals we teach.

ACT utilizes a model of service delivery that is best described as the clinician-family partnership model. Parents are an integral part of the assessment and intervention from start to finish by helping establish goals of treatment, implementing behavioral procedures, and evaluating treatment outcomes. Parents have the best understanding of the unique strengths and deficits of their child with special needs. The child benefits greatly when parents and clinicians partner to create a custom-tailored program comprised of a range of evidence-based behavior treatments. At ACT, we know that every family has a unique story and experiences which are treated with the utmost respect.


Mariela Feldman is a Board Certified Behavior Analyst (BCBA), who specializes in the treatment of children with autism and related disorders. She has 12 years of experience in the field and holds a Master degree in Behavioral Psychology from the University of Judaism. Ms. Feldman oversees the provision of all services at ACT and is supported by highly-trained clinicians in the field.

Ms. Feldman has appeared on the TV show, “Los Niños en su Casa,” (the Spanish version of “A Place of Our Own,”) as the Autism Expert on KCET on May 9, 2007. She has taught BCBA courses at National University in Los Angeles and has presented at conferences such as CalABA.

Mission Statement

ACT strongly upholds the belief that individuals with special needs have a right to a high quality of life. All of ACT’s programming is carefully designed with the guiding principle that pursuing personal achievement and striving to fulfill ones potential is a natural right for all individuals. We believe that equipping individuals who have special needs with skills necessary for independent functioning can foster personal development and facilitate living a full, dignified life. ACT is committed to this mission.

Guiding rules

  • All individuals have the potential to develop skills beyond their current level and should be free of behaviors that cause injury or pain to themselves or others.
  • Functional skills that will be meaningful in an individual’s everyday life will be targeted in interventions. Goals selected for a curriculum are developmentally and socially significant.
  • Treatments are based on evidenced-based literature to achieve positive outcomes.
  • Reliable data is gathered on every targeted goal and will be analyzed in order to make informed decisions regarding type and direction of treatment.
  • Effectiveness of treatment is closely monitored. The program is expanded or edited according to the actual progress being made.



16-Hour Group Parent Training

Van Nuys:


First and Third Saturday of each Month: 9:00-2:30pm 


First Wednesday of each month from  9:00-2:00pm



First 4 Fridays of each month from 




Santa Clarita:
Session 1: Saturday Classes. Inquire about times

Session 2: Flexible Weekday Schedule. Inquire about time.


Dates for all offices are subject to change. Please contact local office





ACT is looking for knowledgeable, motivated individuals to join our wonderful team.
We provide BCBA supervision hours. If you are interested in joining us, please send your resume to This email address is being protected from spambots. You need JavaScript enabled to view it.

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