The main characters in the 2015 Pixar movie Inside Out were all emotions; Joy, Anger, Sadness, Fear and Disgust. The film is a great introduction to psychology. And it's funny. Emotions are an even more complex area than consciousness, and they have more of an impact on our behaviour. Neuroscientists want to understand how hormones (such as oxytocin) affect our emotions and why people with autism often have difficulty identifying emotions.