# What is the difference between cause and effect and correlation?

## What is the difference between cause and effect and correlation?

A correlation is the relationship between two sets of variables used to describe or predict information. Sometimes when there is a correlation, you may think that you have found a causation. Causation, also known as cause and effect, is when an observed event or action appears to have caused a second event or action.

## Is cause and effect correlation?

Where there is causation, there is correlation, but also a sequence in time from cause to effect, a plausible mechanism, and sometimes common and intermediate causes. While correlation is often used when inferring causation because it is a necessary condition, it is not a sufficient condition.

Why is correlation important?

A correlation between variables indicates that as one variable changes in value, the other variable tends to change in a specific direction. Understanding that relationship is useful because we can use the value of one variable to predict the value of the other variable.

### What is a correlation effect?

A correlation identifies variables and looks for a relationship between them. An experiment tests the effect that an independent variable has upon a dependent variable but a correlation looks for a relationship between two variables.

### Is a correlation an effect size?

The Pearson product-moment correlation coefficient is measured on a standard scale — it can only range between -1.0 and +1.0. As such, we can interpret the correlation coefficient as representing an effect size. It tells us the strength of the relationship between the two variables.

What does the correlation tell us?

Correlation is a statistical technique that can show whether and how strongly pairs of variables are related. For example, height and weight are related; taller people tend to be heavier than shorter people. Correlation can tell you just how much of the variation in peoples’ weights is related to their heights.

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