Andrew Gilbey

11 Questions 19 Answers 0 Followers

Questions related from Andrew Gilbey

How to score JBI checklist for analytical cross sectional studies?

Can anyone direct me to the instructions for this checklist? What I downloaded from JBI doesn't have an explanation for how to score answers. I'm also looking for the same for JBI's critical...

20 October 2021 8,009 7 View

Does the data in a structural equation model need to be independent?

I have used EQS many years ago and when I did the data in each individual variable I believed were independent (they were individual participants' scores on a standardized measure). So I had no a...

26 July 2021 5,475 3 View

Interpreting Forest Plots - how are the numbers under n/N for treatement and control derived?

I've been exploring a few tutorials on meta-analysis and am struggling with the information on the Forest plot concerning n/N. Specifically, in the examples I've been looking at, the numbers seem...

24 October 2019 1,312 4 View

Effect sizes for non-significant results?

I firmly believe that when authors provide effect sizes for results that are statistically significant, say, a partial eta sq of .444 for a p value of

01 November 2017 8,621 12 View

Can G*Power cope with an a priori power analysis for mixed model ANOVA (1 B-Subs factor and 2 W-Subs factors)?

I do use G*power for mixed models, but haven't done so when there is more than one within-subjects factor. Can it do an a priori power analysis when I have one between subjects factor (either 2...

05 August 2015 1,943 5 View

How can I calculate the effect-size for a repeated measures t-test?

I use an online calculator for between subjects t-tests, as my version of SPSS doesn't seem to offer effect sizes. I recollect checking what it did many years ago and it seemed to be accurate. So...

21 November 2014 1,260 11 View

Can we use Bonferroni for univariate tests in a MANOVA?

I always thought that one benefit of using MANOVA is to avoid inflating the risk of Type 1 error that might occur by conducting, say, multiple t-tests. However, I’ve since found a few places where...

28 July 2014 7,032 2 View

Google scholar for systematic reviews: what limit on search returns?

Are any researchers who are undertaking systematic reviews also adding a search of google.scholar? And if so, what numerical limit are you putting on results that you inspect? In some earlier...

25 March 2014 4,084 22 View

Is 'r' an effect size for the size of the difference in a repeated measures t-test?

Is 'r' an effect size for the size of the difference in a repeated measures t-test? I've gotten into a debate about whether r is an effect size for the difference between two within-subjects...

01 January 1970 9,406 4 View

Determining what is the N of a study

Sometimes it will be obvious, but not always in my experience. A recent study I was reading implied it was 400 (and it was on this basis the inferential tests were undertaken). However, the study...

01 January 1970 9,643 1 View

Where do regression analyses sit in the heriachy of evidence?

When researchers draw conclusions about something on the basis of regression analyses, in general, how strong might their conclusions be and how likely might they be affected by bias? For...

01 January 1970 2,353 3 View