The simplest factorial design is that which has:

A) two independent variables with two levels each.
B) 6 conditions and 3 possible main effects.
C) one independent variable with three levels.
D) 4 possible interactions and 8 conditions.

Factorial Design

An experimental setup that involves studying the effects of two or more factors by varying them systematically.

Independent Variables

Factors in an experimental setup that are intentionally changed by the investigator to determine their effect on the dependent variables.

Levels

Different stages or degrees within a process or structure, often used to describe intensity, concentration, or hierarchy.