Curse of Knowledge

People must choose a well-known song and tap the rhythm on the table. Listeners have to guess the song. The tappers think listeners will guess 50% of the time, when in fact they only guess 2.5% of the time. 

Once we know the melody of a song, it is hard to imagine not knowing it.

We believe that concepts that are obvious to us are understood by others.

See the full study here :

Newton, E. L. (1990). The rocky road from actions to intentions. Stanford University.

Want to know more about biases?

Blind Spot Bias

Automation Bias

Pratfall Effect