Sporting aggression more common in opponents of a similar ability than in contests between unequal teams
Steve Connor is the Science Editor of The Independent. He has won many awards for his journalism, including five-times winner of the prestigious British science writers’ award; the David Perlman Award of the American Geophysical Union; twice commended as specialist journalist of the year in the UK Press Awards; UK health journalist of the year and a special merit award of the European School of Oncology for his investigative journalism. He has a degree in zoology from the University of Oxford and has a special interest in genetics and medical science, human evolution and origins, climate change and the environment.
Wednesday 15 August 2012
Football matches are more likely to turn aggressive and
dirty when the teams are evenly matched compared to contests between two
unequal teams, a study has found.
The same is true of basketball matches and is probably a universal phenomenon in all competitive team sports where two opposing teams are of the same level of ability, scientists said.
A study of premier league football matches in Germany and basketball games in the North American league has found that aggressive contact between players increases when opponents are more equal, the researchers said.
The same is also true of aggressive contests between individuals in the animal kingdom, whether it is rutting deer stags or quarrelsome Siamese fighting fish. Now scientists believe they have found evidence for the same trait in competing groups of sportsmen.
The scientists counted the fouls in 1,530 football matches in the German Bundesliga and 1,230 games in a season of the National Basketball Association. They gave each team a ranking based on their past performance and this was used to calculate a measure of ability called resource-holding potential (RHP).
According to Gert Stulp and colleagues of the University of Groningen in the Netherlands, who carried out the study published in the journal Biology Letters, the RHP of each team became a good measure of relative ability compared with other teams in the same league.
“We found that in both sports the number of fouls committed increased when the different in RHP was smaller. Thus we provide what is to our best knowledge the first evidence that, as in conflicts between individuals, conflicts escalate more when the groups are more similar in RHP,” the researchers say.
“Conflicts between animals escalate more when individual competitors are more similar in RHP. Here we have shown, to our best knowledge for the first time, that this effect is also apparent during conflicts between groups,” they say.
“More specifically, the difference in ranks, that is the difference in our estimate of group RHP between teams predicts the number of fouls committed during a game of both football and basketball.
“Moreover, we found that in football more cards were shown by the referee when differences in rank were smaller, showing that more severe fouls were committed when the difference in RHP was smaller,” they add.
Previous research on male football players had shown that the sex-hormone testosterone, which is linked with aggression, increases significantly prior to matches when the game was between two extreme rivals – more so than when playing against a moderate rival.
“Thus playing against a well-matched team may well increase testosterone and hence the aggressiveness of the players, which results in more fouls,” the scientists say.
The origin of sport probably lies in the need forindividuals to improve their skills in physical competition, such as warfare or hunting, to it should come as little surprise that there is a common thread with competitive contests in the wider animal kingdom, the scientists say.
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