The objective of this study was to examine the relation between activities of daily living (ADL) ability and age among well people between three and 93 years of age. The study is one of descriptive comparison in design. Existing data from the international Assessment of Motor and Process Skills (AMPS) database were examined. The participants constituted a sample of 4398 persons who met the inclusionary criteria. All participants were evaluated using the Assessment of Motor and Process Skills (AMPS). The results showed that ADL ability increased sharply from 3 to 6 years and continued to improve beyond six until 15 years. After age 15 years, ADL performance ability plateaued until age 50 where it began to gradually decline through to the end of the age range studied. This research has implications for the practice of occupational therapy in determining the need for service and establishing goals based on the identification of people whose ADL performances are below age expectations. ADL ability, assessment of motor and process skills, development, lifespan. K E Y W O R D S
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