Study shows fall time change affects assault rates


Most people have enjoyed getting that extra hour of sleep in the morning when Daylight Saving came to an end.

But a new study by the University of Pennsylvania shows a connection between crime and when our clocks fell back an hour Sunday.

An abstract printed in the Journal of Experimental Criminology suggests mild and short-term changes in sleep do significantly affect rates of assault.

The researchers calculated crime reports from Chicago, New York, Philadelphia, and Los Angeles.

They compared assault rates on the Monday immediately following daylight saving time (DST) and the Monday a week later.

The same was done for when DST returns to standard time in the fall.

The result was a 2.8% rise in assaults immediately following the return to standard time, when an hour is gained, as compared to a week later.

Crimetracker 10 looked into crime reports in the city of Columbus and found a similar trend, albeit slight as well. On the Monday following the end of DST, assaults rose slightly in the fall of 2014 and 2015.

The number of assaults fell even in 2016. We are working to analyze the results for 2017.Researchers at the University of Pennsylvania say the results aren’t exactly what they expected.

They thought getting that extra hour of sleep would make people less cranky - and therefore - less aggressive.

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