Start From
A Kind of Analysis
Know the kind of analysis you need, like comparing groups, relating variables or checking agreement between raters? Start from that kind and narrow down to the method.
Kinds of Analysis
Descriptive and Distribution 2 methods
Summarizing data and describing its shape.
Agreement and Reliability 8 methods
How consistently raters, items or occasions measure the same thing.
Correlation and Association 8 methods
Whether, and how strongly, two variables move together.
Categorical Data and Proportions 6 methods
Counts and proportions across categories.
Nonparametric Group Comparisons 4 methods
Comparing groups using ranks instead of raw scores.
t-Tests 4 methods
Comparing one or two means.
ANOVA Family 9 methods
Comparing means across three or more groups or conditions.
Linear Regression 7 methods
Predicting a continuous outcome from one or more predictors.
Generalized and Multilevel Regression 9 methods
Regression for nested data and non-continuous outcomes.
Structural Equation Modeling 3 methods
Testing systems of relationships among variables.
Longitudinal and Growth Models 2 methods
Modeling change over time.
Factor Analysis 3 methods
Finding the latent dimensions behind a set of items.
Psychometrics and Measurement 8 methods
Whether a measure measures what it should.
Classification and Diagnostic Analysis 2 methods
Sorting cases into groups and judging how well a measure classifies.
Other Specialized Models 1 method
Models for specific kinds of data.
Other Ways to Start
Result Decoder
You have a result from a paper:
…anxiety differed across the three groups, F(2, 87) = 4.12, p = .020, η2p = .09.
Decode It
Your Research Question
You have a question you want answered:
“Do students who sleep less score lower on exams?”
Find Your Question
Describe Your Study
You have a study design, but no method yet:
Three groups · different people in each · one score out of 100
Describe Your Study
All Methods
You have a method's name:
“My advisor said to run a mixed ANOVA.”
Find the Method
Glossary
You have a term you don't recognize:
“What's a Greenhouse-Geisser correction?”
Look It Up