Search found 31 matches

by Whirly123
Wed Jan 31, 2024 12:08 pm
Forum: Statistics
Topic: How to test for support for random slopes using both frequentist methods and Bayesian methods
Replies: 1
Views: 917

How to test for support for random slopes using both frequentist methods and Bayesian methods

In the (Bayesian) paper: https://pubmed.ncbi.nlm.nih.gov/35357978/ and also the famous (frequentist) Bar paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3881361/ we want to specify all random slopes in so far as the data support the hypothesis that this variance exists. The recommendation given ...
by Whirly123
Tue Jan 30, 2024 2:30 pm
Forum: Statistics
Topic: What should we do about having given "shotguns to toddlers"? (Linear Mixed-Effects)
Replies: 4
Views: 14592

Re: What should we do about having given "shotguns to toddlers"? (Linear Mixed-Effects)

A really minor point, but just in case others stumble on this thread they might be confused by a typo in the original question: In particular, it appears that the p values may (but not necessarily) be inflated when the model includes random slopes but not random intercepts I think you meant to say i...
by Whirly123
Wed May 17, 2023 7:34 pm
Forum: Statistics
Topic: Why does a bipolar scale need indifference at zero?
Replies: 2
Views: 3478

Re: Why does a bipolar scale need indifference at zero?

Thanks Simonmoon!

Actually this problem was solved (see here: https://forum.cogsci.nl/discussion/8413 ... ion#latest)
by Whirly123
Thu Feb 16, 2023 11:35 am
Forum: Statistics
Topic: Why does a bipolar scale need indifference at zero?
Replies: 2
Views: 3478

Why does a bipolar scale need indifference at zero?

We have a bipolar scale that asks do you agree with A more or b more It happened to be coded this way (1) completely agree with A <--> (7) completely agree with B So (4) is indifference It should have been coded this way: (-3) completely agree with A <--> (3) completely agree with B So (0 is indiffe...
by Whirly123
Wed Feb 15, 2023 9:33 am
Forum: General
Topic: GAMLj and Linear Regression giving me different PVals
Replies: 3
Views: 1508

Re: GAMLj and Linear Regression giving me different PVals

Oh - also found a bug. If I set scale back to "None", duplicate the analysis and change the IV to something new it will still say the scale is set to "None" but it will be centered again. You need to click on any of the other ones and then back to "None" again.
by Whirly123
Tue Feb 14, 2023 11:27 pm
Forum: General
Topic: GAMLj and Linear Regression giving me different PVals
Replies: 3
Views: 1508

Re: GAMLj and Linear Regression giving me different PVals

Oh it appears to be the Scaling - I didn't realise that would so drastically change the p values. The interpretation of the two different results is drastic - the Explanatory Variable explains all the variance or it doesn't. Not sure how to interpret.
by Whirly123
Tue Feb 14, 2023 11:12 pm
Forum: General
Topic: GAMLj and Linear Regression giving me different PVals
Replies: 3
Views: 1508

GAMLj and Linear Regression giving me different PVals

There is a significant difference in response between two conditions. We want to see if this difference goes away by accounting for another variable (i.e. to see whether it is fully explained by that variable). So we have Response ~ Condition * Explanatory Variable Super simple. If I run a linear re...
by Whirly123
Sat Oct 24, 2020 6:32 pm
Forum: Statistics
Topic: Testing whether the rank ordering of items between two group
Replies: 9
Views: 6447

Re: Testing whether the rank ordering of items between two g

That doesn't seem quite right (unless I doing it wrong).

My data could look like this:
dat.jpg
dat.jpg (42.58 KiB) Viewed 6440 times
And Friedman's won't let me test between groups 1 and 2.
by Whirly123
Sat Oct 24, 2020 2:25 pm
Forum: Statistics
Topic: Testing whether the rank ordering of items between two group
Replies: 9
Views: 6447

Testing whether the rank ordering of items between two group

Putting this really simply, I will have data from two different groups of participants where they rank order the "moral worth" of a set of non-human animals. I want to be able to test whether the rank ordering between the two groups is significantly different. Is there an appropriate test ...
by Whirly123
Sun Jul 19, 2020 6:13 pm
Forum: Statistics
Topic: Unbalanced Data, Continuous vs Categorical Coding
Replies: 2
Views: 2646

Re: Unbalanced Data, Continuous vs Categorical Coding

Yes, I would agree with your reasoning. If the "group" of data points for "good payouts" is much smaller than the others, when you code the variable as continuous its effect will be "driver" mostly by bad and medium payout, because they represent when the majority of t...