Why can't I have my cell phone near me during class?
Studies show that "the 'persistent presence' of smartphones comes at a 'cognitive cost'". This means that, like the title of the report, "Even the mere presence of a smartphone makes you dumber"!
Even if your phone is on silent, face-down on the desk next to you, it affects your cognitive performance. What's more, you probably think that it doesn't! Studies show that although most people think the presence of a smartphone affects performance, it actually does.
What's more, people who are most dependent on their phones (i.e. they feel more anxious if they forget their phone at home), suffer the most cognitively when their phones are present - meaning, they benefit the most from their absence.
Researchers suggest that "adding 'defined and protected periods of separation... may allow consumers to perform better not just by reducing interruptions but also by increasing available cognitive capacity".
In class, this means that your phone must be put away at the front of the classroom in its assigned slot for the entirety of the class, unless otherwise specified by the teacher.