Not sure if this is the same issue you were having, but links are below:

kylehamilton's clarification: https://forum.jamovi.org/viewtopic.php?f=12&t=316

how to recode variables in Jamovi: https://blog.jamovi.org/2018/10/23/transforming-variables.html

Statistics: Posted by jmjamison — Fri Oct 15, 2021 1:45 am

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i wouldn't assume that definite values means that it's correct, or that not-definite answers means it's broken or not working. that heuristic isn't always reliable.

we've implemented this using afex, and we rely on henrik's judgement as to the most correct analysis here. your next step might be to reproduce this result with afex, and then go and ask henrik about it. if it turns out there is an issue here, he'll be the one making the fix.

cheers

jonathon

Statistics: Posted by jonathon — Wed Oct 13, 2021 9:57 pm

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Statistics: Posted by Bobafett — Wed Oct 13, 2021 1:11 pm

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Cheers,

Ravi

Statistics: Posted by Ravi — Tue Oct 12, 2021 11:43 am

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i'll ask ravi.

jonathon

Statistics: Posted by jonathon — Tue Oct 12, 2021 9:55 am

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Statistics: Posted by Bobafett — Tue Oct 12, 2021 9:46 am

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Hi Jonathon,

you are right to mention the possibility of using backticks to wrap special characters.

I wonder, why mess with special characters for variable names?

I didn't give this tip, specifically, because Windows users with an Italian keyboard are forced to use the numeric keypad to enter ` (ALT + 96), but what to do when using a laptop?

Perhaps the "simplest" solution is to remap the keyboard like Linux, since Linux allows you to type ` by pressing ALT + ' (ALTGR + apostrophe).

Cheers,

Maurizio

Statistics: Posted by MAgojam — Tue Oct 12, 2021 8:16 am

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you can use special characters if you wrap it in backticks. so you can go:

`"STUDY"` != ""

note that backticks are not the same as an apostrophe or 'single quote'. you'll (typically?) find the key for them below your escape key.

cheers

Statistics: Posted by jonathon — Mon Oct 11, 2021 11:03 pm

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P.

Statistics: Posted by PeteD — Mon Oct 11, 2021 10:55 pm

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with thanks

Statistics: Posted by jonathon — Mon Oct 11, 2021 9:15 pm

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i think the issue is to do with spaces in the variable name. it's a known issue, and a fix should be coming soon.

with thanks

Statistics: Posted by jonathon — Mon Oct 11, 2021 9:14 pm

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Thanks

Ben

Statistics: Posted by BenH — Fri Oct 08, 2021 4:10 pm

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Is there a reason this is occurring, or is it simply the case that I have too many variables in this dataset for them all to appear.

Thanks!

Statistics: Posted by TomShipp — Fri Oct 08, 2021 3:10 pm

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In a linear model (glm, mixed or whatever ) with X (categorical) and W (any kind of variable) as independent variables, two main effects X and W, and an interaction X:W, the interaction coefficients can be interpreted as the difference in the effect of W between levels of X .

If you omit the main effect of W, however, the interpretation of the coefficients is completely different. Each coefficient is the simple effect of W estimated for a specific group of X.

So in your first model, the coefficient POL_LVLGND*ANXIOUS is the effect of ANXIOUS estimated for the group POL_LVL=GND, the coefficient POL_LVLCON*ANXIOUS is the effect of ANXIOUS estimated for the group POL_LVL=CON, and so on.

If you what to check that this holds in your data, ask for the simple effects of ANXIOUS in your second model [POL_AVG ~ 1 + POL_LVL + ANXIOUS + POL_LVL:ANXIOUS+( 1 | ID )] . You will see that the simple effects coefficients will be equal to the ones you obtain as interactions in the original model.

The story is that omitting one main effect was the old fashion way to quickly estimate simple effects (before jamovi easy interface )

The general idea to get here is that, no matter what a lot of people say, we are not free to decide which effect to estimate and which not, based on our interest in the results. When you omit one effect, the interpretation of the other effects changes. Keep in mind that I'm not usually interested in the left-back wheel of my car, but I try to be sure that it is there when I drive.

Statistics: Posted by mcfanda@gmail.com — Fri Oct 08, 2021 2:44 pm

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