Final answer:
Children with an easy temperament are positive, adaptable, and capable of regulating their emotions, characteristics which can influence responsive parenting. Approximately 40% of children are estimated to have an easy temperament, according to foundational research by Thomas and Chess.
Step-by-step explanation:
The easy temperament is one of three types of temperaments that psychologists Thomas and Chess identified in infants and young children. Characterized by regular biological rhythms, a positive disposition, adaptability to new experiences, and a general ease in dealing with new objects and people, children with an easy temperament are typically positive, adaptable, and can regulate their emotions effectively. This type of temperament is recognizable very early in life and is believed to have a biological basis, although it can be influenced by environmental factors and maturation.
Regarding statistical data, the Thomas and Chess study from 1977, which is a foundational work in this area, classically found that approximately 40% of children display an easy temperament. However, it is important to note that these figures may vary due to different methodologies and newer research may provide updated statistics. When discussing the overall demeanor of children and its impact, children who are considered easy may elicit positive responses from those around them, including more warm and responsive parenting styles.