Statistics
Disclaimer: I am not a Statistician!
This page was started because I have written so many statsbased notes and guides for myself and because this helps me to organise them. I do not go into the equations and maths behind everything. It is just a guide for what to do when, how to implement particular tests, and what to writeup. This is based on my own experience as a psychologist.
Use any information provided here at your discretion. I cannot take responsibility for your stats being wrong, for your paper being rejected based on your stats, or for your supervisor disagreeing with them. Do not use this page as the sole resource for your stats. If you believe I may have something wrong, feel free to let me know. Content will be updated periodically  I can't put everything up in one go.
I use SPSS in my statistical analyses. I am assuming you have some basic knowledge of how to navigate SPSS, like when to use the "variable view" and when to use the "data view", and how to create the appropriate graphs, etc.
Statistical Tests:
Compare two groups/levels
Betweensubjects
Withinsubjects
Interval or Ratio (Normally Distributed)
Interval or Ratio (NonNormal), or Ordinal
MannWhitney U Test
Wilcoxon Signed Ranks Test
Dichotomy (Binomial)
Ficsher's test
McNemar's test
Compare 3+ levels OR compare 2+ IVs with 2+ levels in each
Betweensubjects
Withinsubjects
Mixed design
KruskallWallis test
Friedman's test
ChiSquare
Cochran's Q
Find a relationship between two variables
Predict a value with
One Independent Variable (IV)
Multiple IVs or Binomial Variables
Pearson's Correlation
(Non)Linear Regression
Multiple (Non)Linear Regression
Spearman's Correlation
NonParametric Regression
Multiple (Non)Linear Regression
Cramer's V
Logistic Regression
Multiple Logistic Regression
Procedure and Writeup Templates

Parametric ttests (Paired Samples ttest and Independent ttest)

Nonparametric ttests (Wilcoxon Signed Ranks test and MannWhitney U test)

ANOVAs

Oneway betweensubjects ANOVA (example: 1x3 design, i.e., 3 levels, 1 factor/IV)

Oneway withinsubjects ANOVA (example: 1x3 design, i.e., 3 levels, 1 factor/IV)

Twoway betweensubjects ANOVA

(example: 2x2 design, i.e., 2 factors with two levels in each)

(example: 2x3 design, i.e., 2 factors, one with two levels, one with three levels)


Twoway withinsubjects ANOVA (example: 2x2 design, i.e., 2 factors with two levels in each)

Twoway Mixed ANOVA

(example: 2x2 design, i.e., 2 factors with two levels in each)

(example: 3x6 design, i.e., 2 factors, one with three levels, one with six levels)


Threeway Mixed ANOVA (example: 2x3x4 design, i.e., 3 factors, one with two levels, one with 3 levels and one with four levels)

If 3way interaction is significant

If 3way interaction is nonsignificant



Nonparametric ANOVAs

KruskallWallis

Friedman's
