Rosa's Law — 2010
Rosa's Law was a United States federal law signed by President Barack Obama on October 5, 2010. It changed the language used in federal law by replacing the terms “mental retardation” and “mentally retarded” with “intellectual disability” and “individual with an intellectual disability.”
The law was named after Rosa Marcellino, a young woman with Down syndrome whose family advocated for more respectful language.
The change was more than simply changing a word.
The older terminology had become stigmatising and disrespectful, and the language people use can influence how people with disabilities are viewed and treated.
Rosa's Law helped reinforce the idea that:
People should be described with respectful language that recognises their humanity rather than defining them by a diagnosis.
Changes in Professional Language
The change also reflected broader developments in disability and healthcare terminology.
For example:
Older terminology → Modern terminology
- “Mental retardation” → Intellectual disability
- “Mentally retarded person” → Person with an intellectual disability
This is also an example of person-first language, although language preferences can vary. Some disability communities prefer identity-first language, such as “autistic person.”
Connection to the DSM-5
In 2013, the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) also changed its terminology from “mental retardation” to “intellectual disability (intellectual developmental disorder)”.
The DSM-5 placed greater emphasis on adaptive functioning when considering severity, rather than relying solely on an IQ score.
What Is Adaptive Functioning?
Adaptive functioning refers to how well a person manages the everyday skills needed to live and participate in society.
It includes areas such as:
- Conceptual skills — communication, reading, writing, mathematics, understanding time and money.
- Social skills — communication, relationships, social judgment, understanding social situations.
- Practical skills — personal care, household tasks, managing money, transportation, work, and daily living.
This is particularly important for support workers because two people with similar IQ scores can have very different strengths and support needs.
Easy-Read Summary
Rosa's Law was passed in the United States in 2010.
It changed outdated and hurtful language in federal laws.
“Mental retardation” was changed to “intellectual disability.”
The law was named after Rosa Marcellino, whose family wanted people with disabilities to be treated with respect.
The change helped show that language matters.
Today, professionals should use respectful and appropriate language and focus on the person's strengths, abilities, rights, and support needs.
A diagnosis does not tell us everything about what a person can or cannot do.