I'm reading an article about "object permanence" in Wikipedia. Here is a link to the article. This is the part I'm having trouble to understand:
Evidence suggests that infants use a variety of cues while studying an object and their perception of the object's permanence can be tested without physically hiding the object. Rather, the object is occluded, slightly obstructed, from the infants view and they are left only other visual cues, such as examining the object from different trajectories. It was also found that the longer an infant focuses on an object may be due to detected discontinuities in their visual field, or the flow of events, with which the infant has become familiar.
Could you please explain a bit about the bolded part? Does it mean "detected discontinuities in the visual field of young children, or the flow of events, causes the children to spend more time looking at the object"? And, what does that "which" refer to? The flow of events, or looking at the object, or both?