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DSM V Mental Retardation: Why the Term Changed to Intellectual Disability

Young adult with an intellectual disability sharing a joyful moment with a a family member during a community outing in Melbourne.

Last Updated on 07/08/2026 by Daniel G. Taylor

Estimated reading time: 8 minutes

DSM V mental retardation no longer exists as a diagnosis. The American Psychiatric Association retired the term in 2013, replacing it with intellectual disability, and the shift reaches further than a simple word swap.

Language shapes how the NDIS understands a person’s support needs. Get the terminology right, and the rest of the conversation gets easier.

Key Takeaways

  • DSM V mental retardation is no longer a diagnosis; it was replaced by intellectual disability in 2013 to reflect a shift in clinical practice.
  • This change emphasizes adaptive functioning over IQ scores, focusing on daily life skills rather than just test results.
  • Rosa’s Law in 2010 initiated this terminology change in federal statutes, recognizing the need for more respectful language.
  • For NDIS plans, using current terminology and proper documentation makes for stronger support cases, reflecting today’s understanding.
  • Older records may still use outdated terms; updating reports ensures accurate representation of current support needs.

Table of Contents

Why the DSM Dropped “Mental Retardation”

Clinicians used “mental retardation” for decades. The word carried a precise clinical meaning once. Over time it became a schoolyard insult, then a slur, and the APA acted.

DSM-5, published in 2013, replaced it with intellectual disability, formally termed Intellectual Developmental Disorder. The change wasn’t cosmetic. It reflected a genuine shift in how clinicians assess the condition.

Old diagnostic practice leaned almost entirely on IQ scores. A number on a test decided everything. DSM-5 pulled the focus toward adaptive functioning instead, meaning how a person actually copes with daily life.

A Broader Shift, Not an Isolated Change

The DSM-5 didn’t act alone. Three years earlier, in 2010, the United States Congress passed Rosa’s Law, striking “mental retardation” from federal health, education and labour statutes and replacing it with “intellectual disability” everywhere the old term appeared.

The law took its name from Rosa Marcellino, a Maryland schoolgirl with Down syndrome whose family campaigned for the change. Congress passed it unanimously. A Senate committee report at the time called the old terminology anachronistic, needlessly insensitive and clinically outdated, in that order.

DSM-5 followed the same logic in 2013, formalising in clinical practice what legislators had already settled in law. Australia’s own disability sector moved the same direction over the same period, and the National Disability Insurance Scheme Act 2013 uses intellectual disability throughout, never the retired term.

None of this happened in isolation. A person-first language movement had been building across English-speaking countries for years, pushing clinicians, legislators and educators to describe the person before the diagnosis. “Individual with an intellectual disability” replaced “mentally retarded individual” for a reason: the person comes first, the diagnosis second.

What Counts as Intellectual Disability Now

American Psychiatric Association logo, the organisation that publishes the DSM-5 and DSM-5-TR diagnostic manuals referenced in this article.

Three criteria drive a diagnosis under the current DSM-5-TR, published by the American Psychiatric Association. A clinician confirms deficits in intellectual functioning through proper testing. They confirm limitations in adaptive functioning across daily life. And both must trace back to the developmental period, before adulthood.

Adaptive functioning splits into three domains. The conceptual domain covers memory, language and problem-solving. The social domain covers empathy, judgement and reading other people. The practical domain covers self-care, money management and holding down a job.

Progress in the practical domain often shows up in everyday things, says Catherine, a SALT Support Worker: managing money for groceries and bills, building the confidence to catch public transport alone, settling into a routine that keeps a job on track. “Those might seem like small steps,” she says, “but they’re the things that build confidence, create more independence, and give people the freedom to live life on their own terms.”

Severity now hinges on these domains rather than a single number. Two people with an identical IQ score can land in very different places once a clinician looks at how each one actually copes.

Why This History Still Matters for Your NDIS Plan

The old language hasn’t fully disappeared. Older medical reports, school records and even some outdated online resources still carry “mental retardation” or similarly dated phrasing. A support coordinator or planner reading historical paperwork needs to recognise the term for what it is: retired clinical language describing the same condition now called intellectual disability.

Getting the language right matters practically, too. A plan built on current diagnostic language, current terminology and current evidence of adaptive functioning stands on firmer ground than one leaning on a decades-old report, and it strengthens your case when you’re working through how to get NDIS funding in the first place.

Before a planning meeting, SALT Psychosocial Recovery Coach Harriet Dixon often sits down with participants and families to work through older reports together. “Those reports can still be important,” she says, “but they don’t always explain what life looks like today.” Together they translate the paperwork into everyday language: what the person is doing well, where they’re finding things difficult, and what supports will help them keep moving toward their goals.

The NDIS itself doesn’t fund a label. It funds support based on need, evidenced through current, accurate reporting.

SALT sees older reports carrying diagnostic terms that no longer apply, and treats them as history rather than grounds for dismissal. “We don’t dismiss those reports,” said Greg Smith, COO of The SALT Foundation. “They’re often an important part of a participant’s history.” From there, SALT works with participants and families to describe the disability in language that’s current and relevant to how it affects their life today, giving planners a clearer, more accurate picture of present support needs.

Common Misunderstandings About the Change

A new name doesn’t mean a new condition. Intellectual disability describes the same underlying reality “mental retardation” once did. What changed is the language, the diagnostic emphasis and, importantly, the respect built into how professionals now discuss it.

Some assume the shift softened the diagnosis somehow, making it less serious or less real. It didn’t. The DSM-5-TR’s criteria are, if anything, more rigorous than the old IQ-only model, since a diagnosis now requires evidence across intellectual and adaptive functioning both.

Others assume “intellectual disability” is itself a euphemism due for replacement soon. Unlikely. The term has held for over a decade across clinical practice, federal law and disability legislation in multiple countries, including Australia’s own NDIS framework. It’s worth noting, too, that intellectual disability is a distinct category from psychosocial disability, even though both fall under the NDIS umbrella and sometimes get confused in casual conversation.

What to Do If Your Records Use Outdated Language

Three practical steps follow.

Check your existing reports for old terminology. If a report predates 2013, or simply hasn’t been updated, it may still use “mental retardation” or an equivalent dated term.

Ask your GP or specialist for an updated report where needed. A fresh assessment written in current language, addressing all three adaptive domains, carries more weight with the NDIA than an old one.

Don’t take offence at the paperwork, and don’t let it sit unchallenged either. Outdated language in an old file reflects when it was written, not a judgement on the person it describes. Still, replace it before it becomes the basis of a new plan.

Action Steps

  1. Locate any diagnostic reports predating 2013 and check the terminology used.
  2. Ask your GP or specialist whether an updated report is worth requesting ahead of your next plan review.
  3. Bring examples of daily adaptive challenges — communication, self-care, social participation — to your planning meeting, regardless of what older paperwork says.
  4. Book an NDIS Readiness conversation with The SALT Foundation if you’re unsure how outdated diagnostic language might be affecting your plan.
  5. Subscribe to SALT’s weekly newsletter below for ongoing updates on NDIS terminology and assessment changes.

Frequently Asked Questions

Is “mental retardation” still a valid medical term?

No. The DSM-5 retired the term in 2013, replacing it with intellectual disability. The DSM-5-TR, the current 2022 revision, retains intellectual disability as the standard diagnosis.

Does an old report using outdated language affect my NDIS plan?

It can. The NDIA assesses current support needs, and a report using retired terminology or missing adaptive functioning detail may need updating to reflect your situation accurately.

What’s the correct term to use today?

Intellectual disability, or the formal clinical term, Intellectual Developmental Disorder. Both appear in the current DSM-5-TR.

Should I ask my support coordinator about outdated paperwork?

Yes. Support coordinators regularly review historical evidence and can advise whether an updated report would strengthen your plan.

Did the diagnostic criteria get easier or harder after the name change?

Neither, exactly, but arguably more thorough. DSM-5 added the requirement to evidence adaptive functioning across three domains, alongside intellectual testing, rather than relying on IQ scores alone.

Is “intellectual disability” used consistently across Australian NDIS documentation?

Yes. The National Disability Insurance Scheme Act 2013 and current NDIA documentation use intellectual disability throughout. The retired term doesn’t appear in current Scheme materials.

Conclusion: Old Language, New Understanding

DSM V mental retardation belongs to clinical history now, not current practice. Intellectual disability describes the same condition with sharper, more respectful, more useful language, and your NDIS plan works better when your evidence speaks that language too.