Both between-subjects and within-subject experiments allow us, within limits, to see the effects of and

The answer to this question is Independent Variables;dependent variables
In this context, dependent variables refers to the variables which value is influenced by another variable.
The independent variables, on the other hand, are the variables that influence the dependent variables and could be controlled by researchers in to measure a desired outcome.

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.