Give an example of a manipulative variable and a responding variable.

There are 2 main types of variables:

Manipulated Variable: The variable that is changed by the scientist; the ‘I control’ variable

The MV (manipulated variable) is what you do!

Responding Variable: The variable that might change because of what the scientist changes - what is being measured

The RV (responding variable) is what happens. the manipulated variable is the cause and the responding variable is the effect. This is the manipulated variable. You controlled or manipulated what happened:

I scared my brother. This is the responding variable. This happened in response to what you did.

My brother screamed.