In a factorial ANOVA there may be many effects estimated. Should I use a correction to control the Type I error rate? Gallery

In a factorial ANOVA there may be many effects estimated. Should I use a correction to control the Type I error rate?

Under what circumstances might I want to use a fractional factorial design for a factorial optimization trial? Gallery

Under what circumstances might I want to use a fractional factorial design for a factorial optimization trial?

What is gained by using effect coding rather than dummy coding to analyze the data from a factorial experiment? Gallery

What is gained by using effect coding rather than dummy coding to analyze the data from a factorial experiment?

Is it possible to conduct a sufficiently powered factorial experiment if I have a multilevel structure to contend with? Gallery

Is it possible to conduct a sufficiently powered factorial experiment if I have a multilevel structure to contend with?

Can I use stratified random assignment in a factorial experiment? Gallery

Can I use stratified random assignment in a factorial experiment?

How do I randomly assign participants in a factorial experiment? Gallery

How do I randomly assign participants in a factorial experiment?

You claim that factorial experiments make highly economical use of experimental participants, but I was taught factorial experiments require massive sample sizes to power. Can you explain this discrepancy? Gallery

You claim that factorial experiments make highly economical use of experimental participants, but I was taught factorial experiments require massive sample sizes to power. Can you explain this discrepancy?