Abstract
Single-item measures of constructs are parsimonious alternatives to multiple-item measures in many types of research. Before selecting a particular instrument, researchers must first determine whether to use a multi-item or single-item instrument to measure the concept to be evaluated. Currently, single-item measures are widely used for both pain and job satisfaction research. To review theoretical and empirical studies of single-item measures, with an emphasis on graphic representational (faces) scales. In this review, theoretical considerations, reliability, validity issues, and comparisons between single- and multiple-item measures are discussed. Faces scales are emphasized as an economical method for assessing such affective responses as pain and job satisfaction. Single-item measures in general, and faces scales in particular, can be valid and reliable measures for global concepts. Because of their ease of administration, lessened respondent burden, and global concept representation, single-item measures have great potential for various types of research. Nurse researchers should seriously consider single-item measures as part of their methodological research "toolkit."
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