Developmental Assessment Collaborative

Colleen Corcoran, PhD & Tracy Tully, MS, CCC-SLP

The Developmental Assessment Collaborative is a partnership between psychologist Colleen Corcoran, PhD, and speech-language pathologist Tracy Tully, MS, CCC-SLP.

We provide comprehensive, multidisciplinary developmental evaluations using a streamlined and efficient client- and family- centered process. Our goal is to walk alongside individuals at every stage of the assessment journey—from initial questions to diagnostic clarity and next steps.

Our collaborative model is intentionally designed to move beyond the often disjointed assessment landscape of siloed providers. We believe that individuals and families are better served when we work together. By integrating expertise across disciplines, we are able to offer improved differential diagnosis and more precise treatment planning.

With over 20 years of combined experience providing therapy and assessment services, we bring both depth of expertise and a shared commitment to this work. Both providers have extensive experience supporting neurodiverse individuals across the lifespan, with particular specialization in early childhood assessment. Developmental assessment is our focus—and something we truly love. Reach out to schedule a free consultation!

Who We Are

We offer a range of assessment services. While we believe deeply in the value of collaborative assessment, assessments completed by either individual provider are also available.

What We Offer

  • Age: 1 - 6 years

    An exploratory assessment of child development across the five developmental domains: cognitive, communication, adaptive, social/emotional, and motor. Ideal for families who are concerned about their child’s development and aren't sure where to start. Also appropriate for those interested in a developmental “check-in.”

  • Age: 2.5 - 6 years 

    All elements of a developmental assessment as well as specific and comprehensive assessment of social/communication and sensory processing aimed at clarifying the presence of Autism Spectrum Disorder. 

  • Age: 7 - 17 years

     A comprehensive assessment of social/communication skills and sensory processing aimed at clarifying the presence of Autism Spectrum Disorder. We utilize the “gold standard” assessment battery including the ADOS-2 and ADI-R. Cognitive, adaptive, and social/emotional functioning will also be assessed to aid in diagnostic decision making and direct treatment planning. 

  • Age: 18+

    A comprehensive assessment of social/communication skills and sensory processing aimed at clarifying the presence of Autism Spectrum Disorder. Cognitive, adaptive, and social/emotional functioning will also be assessed to aid in diagnostic decision making and direct treatment planning. 

  • Age: 5 - Adult

    A comprehensive assessment of attention, hyperactivity, inhibition, and executive functioning aimed at clarifying the presence of Attention Deficit Hyperactivity Disorder. Cognitive, adaptive, and social/emotional functioning will also be assessed to aid in diagnostic decision making and direct treatment planning.

  • Age: All

    For those curious about pursuing an Autism assessment but interested in starting with a brief nondiagnostic screener. 

  • Age: 4 - 17 years 

    Dr. Corcoran is also able to provide nondiagnostic stand alone cognitive and/or achievement tests for school admissions. 

Our Model

Multidisciplinary

We offer a collaborative, multidisciplinary evaluation model often only found in pediatric hospitals—delivered in a more accessible, personalized setting.

Family-Centered

Assessment can be emotional and costly. We prioritize clear communication, transparency, and support every step of the way.

Efficient Timeline

Our comprehensive evaluations are designed to be both thorough and efficient, with most completed in about one month from intake to final report.

Clear Reports

Our reports are comprehensive yet streamlined, with minimal jargon so findings and recommendations are easy to understand and apply.

What to Expect

*Developmental Assessment Collaborative is a marketing name representing two independent practices: Corcoran Psychology, LLC and Tully Speech & Language, LLC. Each provider operates as a separate legal entity and bills independently. Participation in the collaborative assessment model is optional.

Let’s Connect

Please complete this form to inquire about assessment services & schedule a free consultation call.