A cognitive psychologist was interested in the relationship between daily screen time and levels of sustained concentration. He used a correlational analysis to investigate this in a self-selected sample of 45 university students.

Each participant provided their average daily screen time (in hours) using their phone's built-in digital well-being tracker. The participants' concentration levels were then assessed using a standardized 15-minute selective attention grid task, where they had to locate sequential numbers under distracting conditions, resulting in a score out of 50.