A multi-group design is an experimental design that has 3 or more conditions/groups of the same independent variable.

What is multiple group design in psychology?

A multiple-group design compares three or more levels or amounts of an IV. A multiple-group design can have a control group and two or more experimental groups. We can compare three, four, five, or even more differing levels or amounts of an IV.

What is the difference between a factorial design and a multiple group design?

What is the difference between a factorial design and a multiple-groups design? In a multiple-groups design there is one independent variable with two or more levels. In a factorial design there are two independent variables with two or more levels each.