Exploratory factor analysis of Hartmann's Scale for Central Imagery and its relationship to dreamer emotion

Hartmann's theory regarding central imagery (CI) in dreams (Hartmann, 1996), the CI scale itself, and how this relates to emotion was investigated. Ninety-nine participants provided a total of 230 dreams for analysis. Each dream was rated for emotional intensity by participants. Two independent judges rated each dream for CI and on each of the 7 descriptor words that make up the CI definition based on a 5-point scale we devised. A Generalized Least Squares factor analysis with an Oblimin rotation was used and results produced 3 factors that were related to the impact, visual, and attention aspects of the imagery. We found that emotion was significantly correlated with CI, as well as the impact and attention factors but not the visual one. However, although a single factor solution was slightly more highly correlated with CI, a 3-factor solution was best in the analysis. Our methodology appears to have captured a good portion of the CI construct. Further study looking at factors and how they relate to trauma is suggested. 2009 American Psychological Association

Cartography · Developmental psychology · Exploratory factor analysis · Factor (programming language · Psychometrics · Scale (ratio · Child and Animal Learning Development · Computer Science · Memory and Neural Mechanisms · Psychology · Sleep and Wakefulness Research

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