Locus of control refers to whether a person believes they have control over the events in their life or external factors do. There are two types - internal locus of control means someone believes they are in control, while external locus means they believe outside forces determine outcomes. Locus of control influences how people respond to life events and their motivation to take action. Those with an internal locus will be more likely to change situations, while externals may blame outside factors rather than take responsibility.