Learning does not end in the training room.
ID Academy Learning Resources offers short, applicable references for researchers, students, professionals and managers to turn to when they need them.
Rather than long academic texts, we aim to produce content that can be read quickly, applied directly and relied on.
Short answers to the questions that come up when choosing and reading a method.
Statistical Guides
The choice follows from three things: what you are comparing, how the outcome is measured, and whether the groups are independent.
Read more: Which Statistical Test Should I Use?Statistical Guides
The outcome decides. A continuous outcome goes to linear regression; a yes/no outcome goes to logistic.
Read more: Linear or Logistic Regression?Statistical Guides
EFA asks what structure the data suggests. CFA tests a structure you already proposed.
Read more: What Is the Difference Between EFA and CFA?Statistical Guides
Alpha measures internal consistency, not validity. A high alpha does not mean the scale measures the right thing.
Read more: How Is Cronbach’s Alpha Interpreted?Statistical Guides
Without it you may run a study that cannot detect the effect you are looking for, however real that effect is.
Read more: Why Does Power Analysis Matter?Statistical Guides
It shows the trade-off between catching true cases and raising false alarms, across every possible cut-off.
Read more: How Is a ROC Curve Read?Statistical Guides
When the question involves several related outcomes, latent constructs, or a chain of effects rather than a single relationship.
Read more: When Should SEM Be Used?Statistical Guides
Mediation asks how an effect happens. Moderation asks for whom it is stronger or weaker.
Read more: Mediation or Moderation?
