| Abstract: | Multivariate correlational methods such as P-technique factor analysis provide a way to structure intraindividual change by identifying dimensions of covariation in intensive longitudinal measurements. For example, for 20 years or more researchers have acknowledged that some major personality constructs such as anxiety exhibit both trait (relatively stable, interindividual) and state (intraindividual) variability. However, the consideration that state variability might be quite general and can “intrude” in the measurement of putatively more stable attributes has not generally entered into construct validation work and other manifestations of theoretical development. Locus of control, as with many personality constructs, is considered to be a dimension of relatively stable interindividual differences. Levenson's three-dimensional locus of control scale was adapted for use in a measurement-intensive P-technique study involving 10 participants (5 mothers and fathers who were expecting their first child) to examine the extent to which responses manifested systematic liability. The data indicated that perceived locus of control exhibits coherent, day-to-day variability; especially the dimensions identified as internality and powerful others. Such state variation manifestations are discussed in relation to their important implications for measurement, long-term prediction, and theorizing about the nature of personality. |
