A new study reports that in a sample of 11 brains, 4 of the 6 women's brains, but only 2 of the 5 men's brains, had multiple chocolate receptors. (Note: We made this up; there's no such thing as a chocolate receptor, sorry.)

The researchers conclude that their findings explain why so many women are addicted to chocolate. What concerns should a critical thinker have about this study?

The sample size was very small; have the results been replicated? Were the sex differences more impressive than the similarities? Might eating chocolate affect chocolate receptors rather than the other way around? Most important, was the number of receptors related to the amount of chocolate eaten by the brains' owners in real life?