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The study also found that night owls' achievements at school was rated lower than that of larks, by about eight percent - possibly because morning school timetables did not create the right conditions for them to learn. They are most likely to be healthy, wealthy and wise, according to the old adage. But those who are early to bed and early to rise do not always have the upper hand, researchers say. They have revealed that night owls are generally brighter and wealthier than those able to get up early in the morning. Experts from the University of Madrid carried out tests on around 1,000 teenagers and found that those who preferred to stay up late demonstrated the kind of intelligence associated with prestigious jobs and higher incomes. Larks or ‘morning people’, however, often secured better exam results, possibly because lessons are held at the wrong time of day for night owls. The researchers examined the habits and body clocks of the youngsters to determine whether they liked to stay up late and sleep in later in the morning, or preferred to go to bed early and were at their peak in the morning. School performance and inductive intelligence, or problem solving, were measured and academic grades in the major subjects were also taken into account. The results showed that evening types scored higher than morning types on inductive reasoning, which has been shown to be a good estimate of general intelligence and a strong indicator of academic performance. | 
