It was found intellectual activity conferred the most benefits, though all three categories were beneficial.

BBC: Social life 'may cut Alzheimer's risk'

His life has all the look and sound of a fully respectable intellectual activity, rather like, one feels uneasily, the life of a string theorist today.

NEWYORKER: Moon Man

What seems to be attractive in science is no longer its being a high intellectual activity, a continuous human search to represent and predict nature, but for what it can produce in terms of controlling, and therefore in terms of power, of mankind on his sorroundings and his fellows.

UNESCO: Science Policy and Capacity-Building

The bigger question is, how do we build a culture that values intellectual and artistic activity at a higher level, and where people are invited and expected to challenge and improve their own capabilities?

FORBES: Interviewed At Psychology Today

The members of the European Council have demonstrated in Brussels that they have fallen into a period of stupor following the French and Dutch "No" votes to the Constitution - if stupor is what is understood by a decrease in the activity of higher intellectual functions...

BBC: NEWS | Europe | EU's 'Waterloo' summit angers press

Such activity may take the form of intellectual or artistic creation, a social achievement or the mobilisation of public opinion.

UNESCO: Apply for UNESCO Prizes

When the last transit occurred the intellectual world was awakening from the slumber of ages, and that wondrous scientific activity, which has led to our present advanced knowledge, was just beginning.

CNN: A transit of Venus, an age of wondrous science

Sheena Sheikh, a solicitor from intellectual property specialists Briffa, told the BBC that the law is straightforward on such downloading activity.

BBC: Spotify rushes to fix free download vulnerability