A correlational study is a research design that examines the relationships between two or more variables. It is non-experimental, meaning the experimenter does not manipulate or control any variables.

A comment posted by a reader on a recent post reprimanded me for suggesting that marijuana caused relationships to go bad. In this instance the reader was mistaken, as I had specifically used the word ...

Most of us have heard the phrase “correlation does not equal causation”. But understanding how scientists move beyond identifying correlations to establish causation remains a mystery to many. Finding ...