A controversial new benefit replaces the Disability Living Allowance (DLA) for new claimants in Wales today.
The Personal Independence Payment (PIP) was introduced in pilot parts of England in April - and is now being rolled out for the rest of England, Scotland and Wales.
The new assessment includes an individual's ability to carry out a broad range of activities such as washing, dressing, cooking and getting around.
Existing working-age DLA claimants will start to be re-assessed from October - and there are no current plans to replace DLA for children under 16 and people aged 65 and over who are already receiving it.
More top news
Carwyn Jones travels to America to urge business leaders and politicians to maintain a special business relationship with Wales
Two years ago, 18 year-old Conner Marshall was killed in a savage attack by a known criminal who was on probation.
The student, who has lived in the UK since she was 12, faced leaving the UK three months before completing her degree.