theonlytycrane

5+ Year Member
Mar 23, 2014
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Medical Student
When it's an independent variable -> dependent variable setup. Like I explicitly change X and observe Y.
 

aldol16

2+ Year Member
Nov 1, 2015
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Basically only under experimental conditions. You have to be able to manipulate one variable while seeing the effect on another. Otherwise, it's correlational.
 

bobeanie95

2+ Year Member
Apr 19, 2016
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Pre-Medical
You need three conditions to determine causation:

1. Correlation between the two variables
2. Temporal order, so that the independent variable is always temporally prior to the dependent variable
3. Determine non-spuriousness (no confounding/3rd variables are involved).