There are two types of decision making: voluntary and involuntary. Voluntary decisions involve cognitive thinking and considering various factors and alternatives. They can be influenced by credible sources, authority figures, peers, and interpersonal needs. Involuntary decisions are automatic responses based on habits and repetition formed through learning. There are also different decision making styles (Bull, Eagle, Bloodhound, Bee) and work styles (Driver, Expressive, Amiable, Analytical) that influence how people make decisions.