Methods - Psychological Science Empiricism: How to Know...

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Psychological Science Empiricism: How to Know Things
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Empiricism Ancient Greece dogmatists (develop theories) empiricists (make observations) Method Three things make people hard to study complexity variability reactivity
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Psychological Science The Science of Observation: Saying What
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The Science of Observation Observe what people do “John picked up an apple” Explain why they do it “he is going to eat it” “he is going to throw it at me” Measurement must “define” what we wish to measure must find a way to detect it
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The Science of Observation Operational definition define property to measure in concrete terms detect what our definition describes Easy to measure physical properties like “distance” Not so easy to measure psychological properties like “happiness” “a specific set of muscular contractions?” (EMG)
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The Science of Observation With so many ways to “measure” things, it is hard to know what is the right way Problems of defining Validity—able to draw accurate inferences construct validity predictive validity
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Shapes of Frequency Distributions Symmetrical
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The Science of Observation With so many ways to “measure” things, it is hard to
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Methods - Psychological Science Empiricism: How to Know...

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