| Aggression | Behaviour intended to cause unwelcome harm to another person. |
| Altruism | Behaviour benefiting another person at a cost to the helper. |
| Antisocial behaviour | Behaviour showing a lack of concern for the welfare of others |
| Demand characteristics | Participants work out the purpose of a study and modify their behaviour accordingly. |
| Ecological validity | Method measures naturally occurring behaviour. |
| Empathic concern | Emotional feelings for another person, such as sympathy and compassion. |
| Imitation | Copying an observed behaviour. |
| Media | Ways of communicating information to people, such as television and film. |
| Prosocial behaviour | Behaviour benefiting another person. |
| Reinforcement | Strengthening of behaviours through rewards. |
| Social conformity | Change in behaviour as a result of perceived social pressure. |
| Vicarious reinforcement | Reinforcement of ones own behaviour through observing the reinforcement of another's behaviour. |
