Toddler Temperament Assessment

During a routine health assessment for a toddler between 1-3 years old, the nurse is conducting a developmental screening to evaluate the child's physical, cognitive, and social-emotional milestones. One of the concerns from the parents is related to the toddler's expression of emotions and temperament. The nurse explains that at this stage, children typically display certain emotional behaviors and temperament patterns.

Fill in the blank: A toddler in this developmental stage who struggles with transitions and displays intense reactions to environmental changes may be classified as having a __________ temperament.