activities of daily living (basic and instrumental)
/ ADLs; IADLs /
Ask someone what independence means and they rarely say 'walking' — they say being able to get themselves up, washed, dressed, fed, and to the toilet without asking for help; and beyond that, running a household and a life. These ordinary, repeated acts are what rehabilitation ultimately exists to protect, because the difference between needing help to use the toilet and managing it yourself is, for most people, the difference between a life of their own and dependence on others.
Clinicians group these acts into two tiers. Basic activities of daily living (basic ADLs) are the fundamental self-care tasks: feeding yourself, bathing, dressing, grooming, toileting, and moving between bed, chair, and standing (transfers and basic mobility). Instrumental activities of daily living (IADLs) are the more complex skills needed to live independently in the community: cooking, shopping, managing money, taking medications correctly, using the phone, doing housework and laundry, and getting around town. Basic ADLs are the floor of independence; IADLs are what let someone live alone safely rather than just survive in a supervised setting. Both are assessed and retrained largely by occupational therapists.
ADLs are the backbone of rehabilitation goals and measurement: scales like the Functional Independence Measure or the Barthel Index score exactly how much help a person needs with these tasks, and gains in ADL independence are what insurers, families, and patients care about most. The honest framing is that the goal is not always to do a task the original way — it is to get it done. A man may dress himself again not by regaining a nimble hand but by using a button hook, sitting down, and a new technique. Independence achieved through adaptation counts every bit as much as independence through recovery.
A woman after a stroke scores as needing help with bathing, dressing, and cooking. Her occupational therapist sets ladder goals: first the basic ADLs — safe transfers, dressing seated with adapted clothing — then the IADLs of simple cooking and managing her pillbox. Discharge home depends not on how far she can walk, but on whether these everyday tasks are safe.
Basic ADLs are the floor of independence; IADLs decide whether someone can live alone safely.
Independence is measured by the task getting done, not by doing it the old way. Doing it differently — with a tool, a technique, or seated — still counts as independent.