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Have you ever fallen foul of the grammar police? Introverts are more likely to judge a person negatively on the basis of grammatical errors and spelling mistakes, a new study finds. People who are sensitive to grammatical errors are also more likely to be less agreeable by nature. Extroverted people, though, are more likely to ignore written errors. Professor Julie Boland, one of the study’s authors, said: “This is the first study to show that the personality traits of listeners/readers have an effect on the interpretation of language. In this

Largest study to date builds evidence that vitamin deficiency is linked to chronic headaches. Low levels of vitamin D are linked to chronic headaches, finds the largest ever study on the subject to date. A Finnish study of 2,601 men found that 68% had deficient vitamin D levels. Those reporting chronic headaches had lower levels of vitamin D than those who did not. Men with the lowest levels of vitamin D had twice the risk of chronic headaches as those with high levels of vitamin D. Chronic headaches were also

Autism research finds link between this vitamin and serotonin production. Many scientists have speculated that the problematic social behaviour of people with autism is related to low vitamin D and serotonin levels. Now a new study has found a causal link between vitamin D and three hormones which are important in social behaviour: serotonin, oxytocin and vasopressin. Genetic research has shown that vitamin D hormone activates a gene which produces an enzyme leading to higher levels of serotonin (Patrick & Ames, 2014). In the brain, serotonin acts as a neurotransmitter,