Psychology 9-1 GCSE - 

7.1.1 - Understand the concepts of the self and self-concept, including:

Lewis (1990)

a) Existential Self - 

The sense of being separate and distinct from others and the awareness of the constancy of the self. Begins as early as 2-3 months old.

b) Categorical Self - 

Having realised that they are a separate entity, the child now becomes aware that they are an object in the world and that they have properties too.

Rogers (1959)

c) Self Image - 

How we see ourselves, important to good mental health.

d) Self Esteem -

Self esteem (or self worth) comprises what we think of ourselves.

e) Ideal Self -

This is the person who we would like to be. It consists of our goals or ambitions.

f) Self-Actualisation - 

When someones ideal self is congruent with their self image.

g) Congruence - 

When a persons ideal self and actual experience are very similar.

h) Incongruence - 

When a persons ideal self is not similar to their actual experience.