Jonah Lehrer on the information gap theory of curiosity:
The first thing the scientists found is that curiosity obeys an inverted U-shaped curve, so that we’re most curious when we know a little about a subject (our curiosity has been piqued) but not too much (we’re still uncertain about the answer). This supports the information gap theory of curiosity, which was first developed by George Loewenstein of Carnegie-Mellon in the early 90s. According to Loewenstein, curiosity is rather simple: It comes when we feel a gap “between what we know and what we want to know”. This gap has emotional consequences: it feels like a mental itch, a mosquito bite on the brain. We seek out new knowledge because that’s how we scratch the itch.
Beware, then, of halfalogues.