00:01
In this question, you've asked about internal versus external validity.
00:13
And you've asked three different questions about it.
00:15
So i'll tackle them one by one.
00:17
First is how do we increase internal validity in an experiment? the way that you can increase internal validity is to ensure careful planning, adequate quality control, and very precise implementation strategies.
01:05
For example, data collection, data analysis, sample size.
01:09
Internal validity can be controlled by controlling these external variables.
01:16
How would we increase external validity then? external validity can be increased using random sampling.
01:31
This can make sure that there is no bias present.
01:39
Secondly, you could replicate your study to make sure you get similar results, and then you can see if there were any errors or variables present in your study, which you didn't think about...