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Title: Many terms unclear or missing.
Review: I purchased this book as a "good to have" as a psych undergrad student.I consistently find that the term I want to check isn't there, or the definition is so vague as to be of no use. For an example of a missing term, mindfulness, a popular psychological technique related to meditation, isn't in there, yet it has been researched for decades.It's got good stuff in it - but for me, it just never seems to have the thing I'm actually looking at it for.
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