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The good judge of intelligence - ScienceDirect
https://www.sciencedirect.com/science/article/pii/S0160289625000972
"We preregistered and tested 200 participants, a sample size generally suitable for investigating individual differences (Fraley & Vazire, 2014). "
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"... The preprocessing revealed two individuals who were tested twice. Removing their second assessment resulted in a final sample of N = 198 (55 males, 140 females, one neither female nor male, two undisclosed) aged 18 to 76 years (M = 29.39; SD = 13.78), of which the majority (72 %) were university students."