Final answer:
Erikson's ninth stage of development in late adulthood is called integrity versus despair.
Step-by-step explanation:
In Erik Erikson's theory of personality development, he proposed a total of eight stages of development, with each stage presenting a specific challenge that needs to be overcome. However, in late adulthood, Erikson's wife Joan mentioned a ninth stage of development called the ninth stage, also known as the integrity versus despair stage. In this stage, old individuals confront the negative aspects of earlier stages that they may be experiencing again in their old age. They reflect on their lives and either feel a sense of satisfaction and integrity or a sense of failure and despair.