Reading focus
Syllabus: How Do Infants Build Knowledge and Skills?
Apply the linking-hypothesis approach to the drawbridge experiment. Connect its control condition to the object principles discussed by Spelke and Kinzler, while distinguishing a looking difference from a comprehensive object concept.
A question to consider. How does moving the box beside the screen help evaluate the explanation, and what further comparison would still be needed to establish where the expectation came from?
Why this reading
A failure to search for a hidden object may reflect more than what an infant knows about objects. This experiment uses looking at a rotating screen to examine an expectation without requiring a search response. It makes the relation between a task and a claim about knowledge unusually clear.
Before you read
Object permanence concerns the continued existence of an object when it is out of sight. In a violation-of-expectation task, researchers compare responses to events that differ in whether they fit a proposed expectation. The words possible and impossible describe the event’s physical interpretation, not the dependent measure itself.
Read for
- Reconstruct the habituation event and the two test events. Identify what the infant sees and what the account assumes is represented while the box is hidden.
- Explain the purpose of placing the box beside the screen in the control experiment. How does that address a preference for one movement?
- Separate the observed looking difference from the proposed explanation. Which alternatives are weakened by the control, and which broader claims require other evidence?
Consider afterwards
- An infant looks longer at an unexpected event but does not reach for the hidden object. What additional observations would distinguish a difficulty coordinating action from a difference in the strength or form of the representation?
Editorial context
The paper helped shift object-permanence research toward tasks that place different demands on infants. Its control supports a more specific inference than an unexplained novelty preference, but the authors’ interpretation remains an interpretation of behavior. Munakata and colleagues later developed an adaptive-process account of successes and failures across object tasks. The disagreement concerns the mechanisms and strength of representations, not simply whether infants possess knowledge or possess none.