Conducting Health Research: Principles, Process, and Methods presents an integrated and practical introduction to the principles and strategies for planning, implementing, reporting, and assessing health sciences research. Comprehensive in its breadth and depth, with an accessible writing style, this text prepares students in public health and related fields to be adept researchers and consumers of health research. Through real-world examples and step-by-step guidance, Frederick J. Kviz provides students with the skills they need to: identify and evaluate research strengths and limitations as practitioners; to actually perform the various core aspects of research; and to choose among alternative methods when making decisions about health practice, policy, and future research needs.

The Measurement Process, Reliability, and Validity

The Measurement Process, Reliability, and Validity

The Measurement Process, Reliability, and Validity

A stethoscope is held up to a lit heart beat graph. A light is seen at the middle of the stethoscope. Other spirals of light are seen on the right and left of this point.

Learning Objectives

After studying Chapter 8, the reader should be able to:

  • Implement the measurement process
  • Distinguish between levels of measurement
  • Apply classical test theory to developing and assessing a measurement
  • Apply and interpret methods for assessing measurement reliability
  • Apply and interpret methods for assessing measurement validity


Measurement is familiar from everyday use, such as a person’s height or usual travel time from home to workplace. Many measurements already are established, and one needs only to apply them appropriately. However, sometimes it is necessary to modify an existing measurement to improve its fit and performance in a particular situation. Other times, a new measurement device or procedure must be developed for a new concept. It is essential to understand ...

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