Abstract
With the purpose of discussing the measurement in psychology, the definition of measurement was firstly described, and the characteristics of psychological measurement was reviewed in relation to the objectives and subjects of each study. As prerequisites for appropriate psychological measurement and analysis of data, operational definition, work hypothesis, experimental design and control, sampling and survey methods, contents, validity and reliability of questionnaire, and degree classification of obtained value were described. Lastly, problems in psychological measurement were viewed; idiographic and nomothetic method, objective measurement and subjective phenomenon, bias in measurement, measurement of temporal phenomenon, measurement of heterogenous groups.
