1. Cognitive growths, personality, relationships with parents, and cultural concepts have nothing to do with Identity formation.

 2. Erik Erikson discussed the notion of an 'identity crisis' because he believed many young people of Western societies experience this 'full on and painful' phenomenon.

3. Temperament refers to persistent characteristics, but studies show these characteristics only show up later in life.

4. Personality refers to the consistent ways people react to the environment, based on situational variables.

5. Psychoanalytic, Psychosocial, and Learning theories all explain life-span development from the same perspective, which is behavioral.

6. Differentiation occurs during the fetal period of development.

7. Scientists currently believe a fetus reaches the 'age of viability' at 23 weeks, midway through the fifth month.

8. Twin studies in research has contributed significantly to the field of genetics.