Sampling and Measurement
Sampling and Measurement
This chapter examines participant selection, sampling design, sample size and sampling error; as well as the importance of statistical power, effect size, confidence levels, and confidence intervals. Types of sampling, including probability and nonprobability sampling methods, are discussed in relation to both quantitative and qualitative research designs. The measurement properties of instruments including requirements of validity and reliability as well as issues in measurement with human measures (credibility, inquiry audits, and triangulation) are presented.
Keywords: participant selection, sampling design, sample size, sampling error, statistical power, effect size, confidence levels, confidence intervals, psychometric properties, reliability, validity
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