title: Type I: families, planning and errors.
authors.forename: Gordon B
authors.initials: GB
authors.lastname: Drummond
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Vowler
mesh_terms: D000704:Analysis of Variance; D015982:Bias; D015233:Models, Statistical; D010043:Outcome and Process Assessment, Health Care / Q000379:methods* / Q000706:statistics & numerical data*; D010934:Planning Techniques; D011336:Probability; D012107:Research Design; D016896:Treatment Outcome