Temperament is an individuals biologically determined base level of emotionality. It affects how you react to stimulation and refers to how emotionally reactive you are. A person’s temperament is a combination of their individual personality traits. Different temperament traits can be seen in infancy: easy, difficult, and slow to warm up. The temperament that a person has an infant can be an indicator of how they will be as an adult. The easy temperament is described as being in a good mood, adapting to change easily, and has regular eating, sleeping, and bathroom patterns. Approximately 40% of babies are considered to have an easy temperament. A baby with a difficult temperament usually has bad moods, doesn’t respond well to change, and doesn’t have regular patterns. Approximately 10% of babies have a bad temperament. The other general temperament is the slow to warm up types of babies, where the babies are in between easy and difficult. It is considered that approximately 15% of babies have a slow to warm up temperament.