Aiden is a child who tends to get frustrated very easily. He is often in a negative mood, and he does not adapt to change very well. His parents are often frustrated because they have not been able to establish a stable pattern of eating and sleeping for Aiden. Which temperament does Aiden likely have?

In psychology, the term temperament refers to the characteristics and aspects of personality that we are born with, it is assumed to be biologically determined.

According to theorists, there are 3 different types of temperament:

Easy: These children are generally in a positive mood, establishing quickly regular routines in infancy and adapt easily to new experiences.
Difficult: These children tend to react negatively and cry frequently, they engage in irregular daily routines and are slow to accept new experiences.
Slow to Warm Up: These children have a low activity level, are somewhat negative, show low adaptability and tend to display a low intensity of mood.

In this example, Aiden gets frustrated very easily, he is often in a negative mood and doesn't adapt to change very well and his parents have not been able to establish a stable daily routine for him.

We can see that he has the elements which are characteristic of the Difficult temperament (negative reaction, irregular daily routines and slow to accept change).