Central to activity theory is the concept of mediation.

The first international conference on activity theory was not held until 1986.

Over the last 15 years the use and exploration of activity theory in information systems has grown.

The activity theory is one of three major psychosocial theories which describe how people develop in old age.

She is also well known for her work on activity theory.

The activity theory suggests that staying active and social can help you live a healthier, longer life.

And the activity theory actually suggests doing activities you have no interest in may even have negative consequences.

So exactly how does the activity theory of aging apply in today's society?

Routine activity theory says that crime is normal and depends on the opportunities available.

Appropriation in education is often understood and analyzed through activity theory.