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EXPERIMENT VS. CORRELATIONAL STUDY. EXPERIMENT Researcher controls all conditions Experimental group – 1 or more groups of subjects Control group – controlled.

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Presentation on theme: "EXPERIMENT VS. CORRELATIONAL STUDY. EXPERIMENT Researcher controls all conditions Experimental group – 1 or more groups of subjects Control group – controlled."— Presentation transcript:

1 EXPERIMENT VS. CORRELATIONAL STUDY

2 EXPERIMENT Researcher controls all conditions Experimental group – 1 or more groups of subjects Control group – controlled condition where participants may receive a placebo or no treatment at all (used as the standard for comparison) ONLY EXPERIMENTATION IMPLIES CAUSATION

3 CORRELATION Used when a controlled experiment can’t be done Can 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 CAUSATION Correlation coefficient – set of scores to find the closest correlation between 2 variables ◦Stronger relationship: 1.0 ◦weak relationship: 0.0 Positive correlation – both variables increase or decrease; negative correlation – one increases and the other decreases

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