ISBN-13: 9780761925781 / Angielski / Miękka / 2002 / 96 str.
Presents examples and explanations of the major features of high-quality survey systems. This book includes guidelines for experimental and observational designs of surveys, as well as for cross-sectional, cohort and case-control designs. It also provides checklists of risks to avoid for internal and external validity of a design.