Timeline for EFA for item reduction in multi-level data prior to HLM
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 1, 2023 at 23:08 | comment | added | r-ks | @ShawnHemelstrand Yes, subjects rated a group of items 1x a day for 14 days. The purpose of the EFA prior to HLM is for item-reduction. I have 16 items that I have a feeling will group into around 4 factors so instead of running 16 models to look at their relationships with my DV of interest, I will only have to run 4. | |
| Sep 1, 2023 at 9:18 | comment | added | ttnphns | Before considering FA, I would maybe first explore the time dynamics of responses. Is there any trend? Overall trend or types of trends (cluster analysis may be welcome). Having performed all that, the picture how to do FA will become clearer. | |
| Sep 1, 2023 at 7:08 | answer | added | Sointu | timeline score: 1 | |
| Aug 31, 2023 at 19:03 | comment | added | Sointu | I have seen two approaches used in this kind of situation: 1) multilevel factor analysis, which estimates factor structure separately at the within and between level, and 2) using theory and within-person correlations to form composite variables manually. At least psychological variables may have very different within- and between-person correlations and correlation structures, so I would not use aggregated data to obtain dimensions to be used at the within-level. | |
| Aug 31, 2023 at 16:29 | answer | added | Christian Geiser | timeline score: 3 | |
| Aug 31, 2023 at 16:22 | comment | added | Shawn Hemelstrand | I'm confused about two points. First, why do your scales have repeated measures in the first place? Do you mean subjects rated single items multiple times? Second, what is the purpose of doing the EFA and then follow up HLM? | |
| S Aug 31, 2023 at 15:50 | review | First questions | |||
| Aug 31, 2023 at 16:22 | |||||
| S Aug 31, 2023 at 15:50 | history | asked | r-ks | CC BY-SA 4.0 |