What led psychologist Roger Barnsley to conclude that being born early in the year might contribute to success in sports? the mathew affect questons quiz help

Barnsley's conclusion was based on his research into the "Matthew Effect," which suggests that those who are born earlier in the year have an advantage in sports due to their physical maturity. Barnsley found that athletes born in the first three months of the year were more likely to be successful than those born later in the year. He also found that the advantage was more pronounced in sports that require physical strength and speed, such as soccer, basketball, and track and field.