The following link takes you to BBC radio 4 website and a series of programmes called Mind Changers. Each episode focuses on famous Psychological research and a number of studies we cover at GCSE and A'Level are on there. The programmes are aimed at a general audience so are accessible to all and are only 30 minutes each. I have been listening to them while driving and even when I have been out running!
Remember that to achieve the highest grades you should do your own research - this is an easy way to do it. And don't worry - I would not expect anyone to listen to all 33 programmes (although I will be!)