Recent content by Poppy1

1. Removing outliers when there are multiple ANOVA and correlational analyses in a single results section

Thank you for your answer :) I was considering normality because some variables may be normally distributed, others not. So some suitable for parametric analyses, others for non-parametric. Sample size is 30. By outliers, I mean outlying values that were for example very low accuracy/not...
2. Removing outliers when there are multiple ANOVA and correlational analyses in a single results section

I would be grateful for opinion on which of the two options below (or an alternative) is best: Summary of study: In a single results section, different ANOVAs are run on the different metrics – raw scores (such as RT, d prime, accuracy) and also collapsed/composite/index scores (for example...
3. ANOVA on simple proportional accuracy scores versus on d prime indexes

To answer this, you would need to know what d prime is. Here is a link: http://www-psych.stanford.edu/~lera/psych115s/notes/signal/ The method I used is z-score "hits minus false alarms" When I run an ANOVA on simple proportional accuracy scores I find no interaction between condition A...
4. Understanding correlations in order to test speed-accuracy trade-off in experiments

I understand that in experiments where the measures of interest are speed (reaction time) and accuracy, for an effect to be valid one needs to make sure there is not a speed-accuracy trade-off (SAT). Namely, as reaction time gets quicker for a condition, accuracy should also be better for that...
5. How to convert two different types of measurement (both in ms) to run a MANOVA?

I measured reaction time and movement time in an experiment (within-subjects measures) and want to run a MANOVA in SPSS with these measures as the two dependent variables. They are both in milliseconds, but the raw scores are not comparable. My question is how to convert them? Is z-score the...
6. What follow-up tests for 3-way repeated measures ANOVA with no 3-way interaction?

For a three-way repeated measures ANOVA: Do I use simple main effects syntax or just run t-tests in SPSS in my follow up analyses (pairwise comparisons?) for a non-significant three-way interaction, with 1 significant 2-way, and 3 significant main effects? I'm interested not just in the...