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jan 1, 1952 - Structure of Mental Ability Louis Leon Thurstone --} american psychometrician --} standardized mean and standard deviation IQ --} developed Thurstone scale --} primary mental abilities * word fluency * verbal meaning * perceptual speed * spatial vizualization * reasoning * memory

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Timeline of the Development of Psychology

ByYhummhie Sarabia- Baldonaza
20 Oct 2017
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Date:

jan 1, 1952
Now
~ 73 years ago

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