If you want to make thoughtful but practical decisions about the measurement of health constructs; look no further than Dr. Polit and Dr. Yang’s latest book; a gentle introduction to and overview of complex measurement content; called Measurement and the Measurement of Change.   This book is for researchers and clinicians from all health disciplines because measurement is vital to high-quality science and to excellence in clinical practice. The text focuses on the measurement of health constructs; particularly those constructs that are not amenable to quantification by means of laboratory analysis or technical instrumentation. These health constructs include a wide range of human attributes; such as quality of life; functional ability; self-efficacy; depression; and pain. Measures of such constructs are proliferating at a rapid rate and often without adequate attention paid to ensuring that standards of scientific rigor are met. In this book; the authors offer guidance to those who develop new instruments; adapt existing ones; select instruments for use in a clinical trial or in clinical practice; interpret information from measurements and changes in scores; or undertake a systematic review on instruments. This book offers guidance on how to develop new instruments using both classical and modern approaches from psychometrics; as well as methods used in clinimetrics. Much of this book; however; concerns the evaluation of instruments in relation to three key measurement domains: reliability; validity; and responsiveness.   This text was designed to be useful in graduate-level courses on measurement or research methods and will also serve as an important reference and resource for researchers and clinicians.  

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