Children in the study were in which two stages of development? Tick both.

• Sensori-motor

• Pre-operational

• Concrete operational

• Formal operational

Which method did Piaget use?

• Lab experiment

• Field experiment

• Observation

• Questionnaire

What was the independent variable?

• nationality

• gender

• age

• intelligence

What was the dependent variable?

• Ability to decentre

• Egocentrism

• Ability to conserve number

• Ability to conserve volume

What nationality were his participants?

• British

• French

• German

• Swiss

Did he use independent groups or repeated measures?

The children were asked to compare two rows of what?

• balls

• counters

• coins

• sweets

Children over which age could conserve number and explain their answer?

• 3

• 5

• 7

• 11

Piaget's sample had which type of bias?

• age

• cultural

• gender

• temporal

Piaget's sample was too ______ to be generalisable.