A bigger brain alone cannot guarantee you a pass to the best jobs in the world as researchers have found that an increase in brain volume contributes very little to a person's intelligence and educational attainment. The study published in the journal Psychological Science was based on MRI-derived information about brain size in connection with cognitive performance test results and educational-attainment measures obtained from more than 13600 people. The researchers found that a positive relationship does exist between brain volume and performance on cognitive tests but size was far from everything -- explaining only about two per cent of the