“…Traditionally there is a certain consensus that this construct refers to individual differences in the reactivity and emotional regulation of each person and that it is a tendency of great biological content and therefore has continuity and temporal stability; therefore, temperament has two characteristics: heredity and its clear presence in early childhood. The EAS scale is the most widely used scale in studies that focus on the characteristics of early-appearing manner of being, The basic dimensions that it evaluates are: (a) emotionality or tendency to become easily and intensely activated (items 2, 6, 11, 15, 19); (b) activity, the preference for displaying a certain level of activity and speed of action (items 4, 7, 9, 13, 17); (c) sociability, the tendency to prefer the presence of other people or to remain alone (items 3,5,10,16,18). (b) shyness, the tendency to be inhibited in new social situations, this last characteristic is usually considered within sociability (1,8,12,14,20).…”