Problem
• Five -month old Felix participated in Baillargeon's study on object permanence in infants. In this study Felix saw a Minnie Mouse Doll that seemed to disappear through the middle of an arch. How did Felix react this event? How did his reaction demonstrate that he had object permanence?
• Riley's three-year-old son has just started talking in longer sentences, but he makes grammatical errors like goed to see the deersRiley wonders why her son makes these errors because he has never heard her makes those errors. Explain to Riley what error her child is making and why he is making this error according to the nativism (linguistic explanation ) for how children learn grammar.
• Give me an example of a conservation task that is mastered in the concrete operational stage.