Intellectual functions may be slower but no worse with age

The research article by Singh-Manoux and colleagues has widely been reported as providing evidence for rapid decline in cognitive ability from age 45 years. 1 However, all tasks were administered with very tight time limits (and often required writing responses), except for the vocabulary test, which showed no evidence of deterioration with age. Timing of onset of cognitive decline: results from Whitehall II prospective cohort study.