Developmental
Assessment
Collaborative
Who We Are
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 developmental assessment.
What We Offer
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.
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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.”
Cost: ~$2,500
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Age: 1-6 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.
Cost: ~$3,400
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Age: 7-17 years
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.
Cost: ~$3,400
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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.
Cost: ~$2,700
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Age: All
For those curious about pursuing an Autism assessment but interested in starting with a brief nondiagnostic screener.
Cost: $350
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Age: 5-18 years
Dr. Corcoran is also able to provide nondiagnostic stand alone cognitive and/or achievement tests for school admissions.
Cost: WISC-V: $500, WISC-V & WIAT-4: $1000
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Item description
Our Process
Plan with Purpose
Together, we outline a path forward that’s realistic, strategic, and tailored to your specific needs.
Collaborate Openly
You’re part of the process. We keep communication open and decisions shared—no black boxes or surprises.
Plan with Purpose
Every project is different. We stay flexible and responsive to make sure the process fits your flow—not the other way around.
Plan with Purpose
When we deliver, it’s not just a finished product—it’s a solution you can trust, backed by real care and effort.
*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.
Let’s Work TogetherIf you're interested in working with us, complete the form with a few details about your project. We'll review your message and get back to you within 48 hours.