Maslow's hierarchy · Maslow
Freud's iceberg · Freud
Classical conditioning · Pavlov
Operant conditioning · Skinner
Trial & error — learning curve · Thorndike
Structure of Intellect · Guilford
Cognitive stages · Piaget
Multiple intelligences · Gardner
Two-factor theory · Spearman
IQ — normal distribution
Stages of creative thinking · Wallas
Memory process
Self theory · Carl Rogers