Search found 288 matches

by reason180
Mon Jan 29, 2024 7:24 pm
Forum: Module development
Topic: Seeking general advice: to duplicate or not to duplicate existing functionality
Replies: 1
Views: 1866

Seeking general advice: to duplicate or not to duplicate existing functionality

I've created an R function for producing a particular style of editable, rich data plot. In the not-too-distant future I would to turn it into jamovi module. It could be a stand-alone module. Or in principle it could be something that somehow gets added onto jamovi's existing ANOVA, repeated-measure...
by reason180
Sun Jan 21, 2024 4:22 am
Forum: Statistics
Topic: Comparing two sigmoideal curves. Seeking advice.
Replies: 3
Views: 2609

Re: Comparing two sigmoideal curves. Seeking advice.

I think a rather complex approach would be to assume that each of the two functions is indeed sigmoidal, find and apply a transformation that appears to mostly linearize the functions, then use multiple regression to ascertain whether the slope for the orientation-by-stimulus interaction is signific...
by reason180
Sat Jan 20, 2024 3:27 pm
Forum: General
Topic: How determine numbers of trials to reach a good SEM
Replies: 2
Views: 2145

Re: How determine numbers of trials to reach a good SEM

Also note that, like an effect size, the standard error of measurement (SEm) does not change systematically with sample size. So adding or subtracting trials will not tend to make the SEm more 'good' or less 'good.'
by reason180
Sat Jan 20, 2024 4:20 am
Forum: General
Topic: How determine numbers of trials to reach a good SEM
Replies: 2
Views: 2145

Re: How determine numbers of trials to reach a good SEM

FYI: Standard error of the mean is an estimate of the variability of a sample mean, if many samples were drawn from the same population. It's not a reliability index. (Perhaps you're thinking of 'standard error of measurement' rather than the standard error of the mean.) It sounds like you want to a...
by reason180
Sun Dec 24, 2023 3:09 am
Forum: Help
Topic: Activating filter changes syntax
Replies: 2
Views: 1499

Re: Activating filter changes syntax

Looks like a bug to me. If I toggle back and forth a dozen times--between the filter being on versus off--the "variables" being "described" do change arbitrarily.
by reason180
Sat Dec 23, 2023 3:27 pm
Forum: General
Topic: Repeated measures ANOVA Posthoc ES
Replies: 3
Views: 2047

Re: Repeated measures ANOVA Posthoc ES

There is controversy as to whether it is correct or not. On grounds that the ANOVA assumes equal variances, some stats programs use the same pooled error term for each test in the set of post hoc tests. In such a situation, individual t tests would usually not produce the same result as ANOVA post h...
by reason180
Fri Dec 22, 2023 6:26 pm
Forum: General
Topic: Repeated measures ANOVA Posthoc ES
Replies: 3
Views: 2047

Re: Repeated measures ANOVA Posthoc ES

Personally, I would use the ANOVA posthocs output table to hand-calculate each Cohen's d effect size. Specifically, I would convert each 'SE of differences' to an 'SD of differences' by by multiplying the 'SE of differences' by the square root of the number of differences. I would then divide each m...
by reason180
Wed Dec 13, 2023 7:32 pm
Forum: General
Topic: Reliability analysis - SEM
Replies: 3
Views: 5029

Re: Reliability analysis - SEM

by reason180
Sat Dec 09, 2023 5:08 pm
Forum: Help
Topic: Excluding multiple rows with one filter
Replies: 9
Views: 29615

Re: Excluding multiple rows with one filter

Here's another example. It filters-out Row 2 ad Rows 5 through 7.

Code: Select all

not(ROW()==2) and not(ROW()>= 5 and ROW()<=7)
by reason180
Sat Dec 09, 2023 5:01 pm
Forum: Help
Topic: Excluding multiple rows with one filter
Replies: 9
Views: 29615

Re: Excluding multiple rows with one filter

To add to the examples provided earlier in this thread, the following filters-out Rows 2, 5, and 7:

ROW()!=2 and ROW()!=5 and ROW()!=7