Intraindividual differences dimensions of mood change during pregnancy identified in five P-technique factor analyses

Daily-self-ratings of mood and state were obtained for approximately 120 days of observation from five pregnant subjects. Measurements were based on a total pool of 75 adjectives culled from the literature to represent eight dimensions of affect established in primarily cross-sectional studies. The data were analyzed in a P-technique factor analysis context to determine both the extent to which interindividual differences and intraindividual variability concepts were interchangeable and how general such intraindividual variability concepts were among different subjects. Although evidence was found that subjects construe many adjectives differently, for dimensions such as Energy, Well Being, Fatigue, and Concentration, the data indicate that cross-sectionally and longitudinally based personality concepts exhibit a fair degree of convergence.