Skip to content

Course home

Choosing a statistical test
x

The A-L-D decision rule

The A-L-D decision rule

Decision tree for choosing A Level Psychology tests by aim, level of measurement, and design

Inferential statistical tests help a psychologist decide whether a pattern in sample data is likely to reflect a real effect in the wider population, rather than chance. To choose the right test, ask three questions in order: what is the research aim, what is the level of measurement, and what is the design?

Choosing a statistical test Lesson

  1. A Level
  2. /Psychology
  3. /Choosing a statistical test