 Independent variable, it's not independent variable, it's internal validity folks, that was not an example, that was just a genuine mistake. Internal validity, the extent to which the experiment did what it was supposed to do. Did it rule out confounds? Did the effect observe? Really have to do with the independent variable? So internal validity, are we doing what we intend to do with our experiment? Are we measuring what we intend to measure? Are you manipulating what you intend to manipulate? Or do you have an actual experiment or did you just set up a little twinkie little AB design? Twinkie? Whatever. Hinky. There's the word I was looking for, a hinky little AB design. So, which isn't experimental. So if you set up a quality experimental design like an ABAB design, then we'll probably have internal validity, assuming you manipulated the independent variable well and you ruled out confounds, right? So then you have quality internal validity. You can have some confidence that the findings that you have have some basis in reality. So, which allows you to draw more conclusions about the power of your independent variable.