Looking for experimental studies on psychology and behaviour.

[Stellar]

Looking for info on psychology experiment that i read sometime ago.

The experiment was conducted amongst 2 or 3 groups of adults where asked to do something before entering a room, wait for period of time before asking them a series of questions. One group was asked to fast before they wait in a room, other group were asked to eat until they are full. 

I am trying to find the results of the experiment again. 

Thanks alot!!