Notifications on app icons on the phone are symbols of connection with others, also rewards. We want them more and more, we check our mobile phone multiple times per day like the rats in the B.F. Skinner's lab.

May be the ways of thinking about applying psychology in digital products. Trick or manipulate people is kinda negative side that taking advantages of our behaviour as human. We could say, Design does a lot with human psychology that lead or change, shape our behaviours to fit our lives.

It was interesting article. Thakns for sharing.