Answer:
The number of swear words said
Explanation:
An independent variable is a variable that is used to observe the changes that occurs in the variable of concern, that is the dependent variable.
Here the independent variable for this study will be the number of favourite swear words shouted. While the dependent variable would be the level of tolerance of pain.
In clear terms, this study wants to find if the number of times the participants shouted their favourite swear word can make them bear more pain.
