Which of the following methods did Piaget use to study object permanence in infants?

• A. He measured infants' brain activity using EEG while showing them objects.
• B. He used standardized intelligence tests to assess memory for objects.
• C. He asked children to verbally describe where an object was hidden.
• D. He observed whether infants searched for a hidden object after it was covered.

Answer: (D)

Verified step by step guidance

1. Understand the concept of object permanence: it refers to an infant's understanding that objects continue to exist even when they are not visible.
2. Recall Piaget's research methods: he primarily used observational techniques rather than physiological measurements or standardized tests.
3. Recognize that Piaget studied infants by presenting them with objects and then hiding these objects to see if the infants would search for them.
4. Note that Piaget did not rely on verbal responses from infants, as they are typically pre-verbal during the stages he studied.
5. Conclude that the method Piaget used was to observe whether infants searched for a hidden object after it was covered, indicating their grasp of object permanence.