Who is the proponent of the Sign Theory (Expectancy Theory) of learning?

→ Erikson claims that adolescents may feel uncomfortable about their bodies for a time when they cannot adapt and 'develop' to the changes. Success in this stage will lead to which virtue? → In the early stages of life, if an infant is not provided with continuity of care by the primary caregiver, what will it lead to? → Who is the proponent of the Army Alpha Test? → Who is the proponent of the Semantic Differential method? → Who gave the Theory of Psychosocial Development? → According to Erik Erikson, how many stages of psychosocial development are there?