Final answer:
The question concerns a psychology study by Renee Baillargeon on infants' understanding of object permanence. Students are asked about the methods and cues shown to infants involving a truck rolling on a track in various configurations, including an illusion of the truck passing through an obstruction.
Step-by-step explanation:
The question refers to a study by psychologist Renee Baillargeon that explored infant cognition, specifically their understanding of object permanence. In Baillargeon's study, infants were shown a series of scenarios with a small truck rolling down a track. Firstly, the truck was shown rolling down an unobstructed track (a), which set the baseline expectation for the infants. Secondly, the students observed the truck rolling down a track with a box placed beside it but not on the track, so the truck's path was still unobstructed (b). Finally, in the third scenario (c), the infants saw the truck roll down the track and appear to pass through what seemed like an obstruction, which would normally be impossible.
The "cues" in Baillargeon's study relate to the expected versus unexpected outcomes for the infants - the idea being that infants will show more interest or surprise to situations that defy their understanding of object permanence. These visual cues are what researchers observe to determine whether the infants have an understanding of the physical properties of objects and their consistent existence, even when out of sight or behaving unusually.