Answer:
Extraneous
Explanation:
Extraneous variables are any variables that you are not intentionally studying in your experiment or test.
Remember that when you do a research, you focus on the effect that one independent variable has on another variable (the dependent one).
This study is examining the relationship between humor and memory, so these would be the dependent and independent variable.
However, this study is not focusing on the gender influence in these variables, since they are not intentionally studying genre in this study, we can say that gender is an extraneous variable.