Help a brother out

Jasp_not_Lover

Hi all,

Long time user (a while back), first time poster!

Having some issues with my JASP stats analysis as apart of my MSc dissertation.

I completed a pre and post intervention test on 11 subjects who all completed the same intervention. The assessment (TMG = Tensiomyography, assesses muscle contractile properties) is on 3 muscle groups across both limbs (totalling 6 sites) and I assessed 2 metrics (contraction time & displacement, well technically 3 I then looked at the inter-limb symmetry but don't think I need to do stats analysis for that).

Couple questions if I may...

1. Is this a repeated-measures within subjects design test?
2. How do I organise my data in the spreadsheet that's easiest for analysing (what rows/columns should I have)?
3. What test will I use to assess if there was a significant difference?

Yes I have emailed my lecturers, no I don't hold too much faith in a speedy response...

To the good guys out there, please help!

JNL

EJ

Hello JNL,

1. Yes
2. You can check out some of the RM ANOVA examples in the JASP data library, the online data library, or the examples from the Field course book "Discovering Statistics Using JASP" -- see the Teaching menu on the JASP website.
3. Best to think carefully about your hypotheses beforehand. You only have 11 participants and several conditions, so I am afraid that your power is not very high.
4. General advice: you can also ask ChatGPT. For simple stats questions it tends to do a good job in my experience.

EJ

Jasp_not_Lover

Hey EJ,

Thanks for your prompt reply and apologies for my delayed one whilst I was locking in.

Appreciate your help and got lucky with an emergency tutor call which saved my bacon!

Results out next week...

All the very best,

JNP Over and OUT

Jasp_not_Lover

Hey EJ,

Thanks for your prompt reply and apologies for my delayed one whilst I was locking in.

Appreciate your help and got lucky with an emergency tutor call which saved my bacon!

Results out next week...

All the very best,

JNP Over and OUT

Kristy31

Was there any specific technique (beyond Bayesian analysis) or approach you used to address the low statistical power inherent with $N=11$ and multiple conditions? For example, did you focus only on the main interaction, or were you able to collapse any sites?

Regards, null's brawl