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CLEVELAND -- College students reading this story and others online for hours may become more anxious and less happy.

A new Kent State University study says college students who spend hours each day online, texting or talking on cellphones are more anxious, less happy and get lower grades.

The Ohio researchers say this appears to be the first study correlating cellphone use to anxiety and happiness.

The study was done by Andrew Lepp, Jacob Barkley and Aryn Karpinski.

The researchers interviewed 536 students representing 82 different majors.

The students recorded daily cellphone use. Each took validated social science tests that measure anxiety and satisfaction with their life, or happiness.