In nine out of 12 tests the average age at which the top performance was achieved was 22.
The first age at which there was any marked decline was at 27 in tests of brain speed, reasoning and visual puzzle-solving ability.
- http://news.bbc.co.uk/1/hi/health/7945569.stm
explains some of the posters here
The first age at which there was any marked decline was at 27 in tests of brain speed, reasoning and visual puzzle-solving ability.
- http://news.bbc.co.uk/1/hi/health/7945569.stm
explains some of the posters here