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matthew-fowler
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EXPERIMENT VS. CORRELATIONAL STUDY
EXPERIMENT
Researcher controls all conditionsExperimental group – 1 or more groups of
subjectsControl group – controlled condition where
participants may receive a placebo or no treatment at all (used as the standard for comparison)
ONLY EXPERIMENTATION IMPLIES CAUSATION
CORRELATION
Used when a controlled experiment can’t be doneCan NEVER be 100% sure groups are similar in
every way can NEVER say the condition was the cause of the effects you observed
DOES NOT IMPLY CAUSATIONCorrelation coefficient – set of scores to find the
closest correlation between 2 variables◦ Stronger relationship: 1.0
◦ weak relationship: 0.0Positive correlation – both variables increase
or decrease; negative correlation – one increases and the other decreases