______ occurs when two (or more) groups are equal or similar on average prior to the introduction of the independent variable.
A) Internal validity
B) Pretest equivalence
C) Statistical conclusion validity
D) Ecological validity

Question

Quizplus · Accepted Answer

Pretest equivalence refers to the condition in which groups are similar or equal on average before any treatment or intervention is applied, ensuring that any post-test differences can be attributed more confidently to the intervention itself rather than pre-existing differences.

______ Occurs When Two (Or More) Groups Are Equal or Similar