u/Baba_Wethu

I want to compare an intervention and control group on knowledge. They did three different knowledge tests with different question on the same topic, with different max scores. The intervention performed better on each of these knowledge tests, but comparing groups using t-test on each knowledge test produces insignificant p-values (0.391, 0.585 and 0.193). I want to test whether intervention had a significant effect on knowledge overall, but if I just combine the three knowledge test scores into one variable, artificial variance is introduced as they had different difficulty levels and max scores. I'm using SPSS, and have both wide and long format datasets.

Chat GPT suggested combining the three p-values using the Fischer method. Is this actually a suitable method? They also suggested using a mixed linear model, but I don't understand how to operate that analysis method in SPSS, and ChatGPT hallucinates when asked for a step-by-step guide. Can anyone help me?

I'm at a loss for words. I'm working on a thesis I'm using an excel sheet in a shared onedrive/sharepoint folder with my supervisor, though I'm working on the excel sheet in the app with autosave on and everything, rather than directly in the browser. This morning, as I began working on the excel sheet, the window crashed, and when it restarted again I just clicked away the massive window with recovery files (because this has happened many times, and it's never reverted any data before, I'm working via the cloud, and the window is massive and annoying). Only then did I realize the version I had up was missing an entire full-day's work. I went into the onedrive/sharepoint in my web browser and went into the change history, and that too was missing the whole of yesterday. I went into %appdata% but could find no recovery file, probably because I dismissed them.

How did this happen, and is there any way to recover the lost data, like some recycle bin for the recovery file or something? I was logged in to the correct user and everything with no error messages yesterday, green checkmark on autosave etc.