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may 15 at 19:05
Positive and negative reinforcement and punishment effectiveness
— Richard Ayotte
16315
may 1 at 17:41
Free online intelligence test with norm table, high reliability, and must be printable?
— Julia
6113
dec 4 at 21:36
How valid is Lumosity's Brain Performance Index and what normative information is available?
— 40Plot
163114
may 13 '12 at 16:28
How is it that taking a break from a problem sometimes allows you to figure out the answer?
— Josh Gitlin♦
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