Question

Basic requirement for the number of subjects for each cell in a factorial design?

Answer 1

A 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. Typically, there are many factors such as gender, genotype, diet, housing conditions, experimental protocols, social interactions and age which can influence the outcome of an experiment.

The simplest factorial design has two independent variables that both have two levels. A 2 x 3 factorial design has three independent variables.

Factorial design involves having more than one independent variable, or factor, in a study. Factorial designs allow researchers to look at how multiple factors affect a dependent variable, both independently and together. ... A study with two factors that each have two levels, for example, is called a 2x2 factorial design