Theorists
Types of Development
Famous Experiements
100

Known for his theory of social learning, he emphasized the importance of modeling and introduced the concept of self-efficacy.

Albert Bandura

100

Piaget’s four stages fall under this type of development, beginning with the sensorimotor stage in infancy

cognitive development

100

What experiment involved imitation and aggression toward a certain inanimate object?

Bobo Doll Experiment

200

He created a theory with six stages of moral development, focusing on justice as a foundation for morality

Lawrence Kohlberg

200

A child learning to take turns, manage frustration, and form friendships is demonstrating this type of development

social-emotional development

200

Which experiment exemplified use of self-control involving a yummy treat?

Marshmallow Experiment

300

This psychologist developed the idea of a growth mindset, where intelligence and skills can grow with effort

Carol Dweck

300

At this level, moral reasoning is based on maintaining law and order, regardless of personal feelings

conventional level

300

In studies at West Point and in national spelling bees, this term was measured to determine how passion and perseverance—not talent—predict long-term success

Grit

400

This psychologist believed learning is a social process and emphasized the role of culture in development

Lev Vygotsky

400

During the preoperational stage, children often struggle to see things from another person’s perspective. This trait is called what? 

egocentrism

400

This moral reasoning experiment asked whether a man should steal medicine to save his dying wife, revealing how people justify ethical decisions rather than what they decide.

Heinz Dilemma

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