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bioinformational perspective on responsivity to imagery

Factor Analysis of Adjective Ratings Ratings on each of the 18 semantic differential scales for each of the 21 pictures for each subject were submitted to a correlational analysis. The resulting 18 x 18 matrix of correlations (based on 1404 observations) was factor analyzed using a principal components analysis. Only three factors with eigenvalues greater than unity were obtained, and the loadings for each of the 18 adjective pairs on each factor are presented in Table 1. These data are completely consistent with the Mehrabian and Russell (1974) solution, in that each of the six scales identified as associated with each dimension by Mehrabian & Russell had its maximum loading on the expected factor in our data.* The three factors of pleasure, arousal, and dominance in the current study accounted for 24%, 23%, and 12% of the variance, respectively, compared to Mehrabian and Russell’s (1974) reports of 27%, 23%, and 14% of the total variance, respectively. Thus, despite widely different stimuli (e.g., pictures vs connected text), judgments of pleasure, arousal, and dominance accounted for the same amount of variability in reports of affective reactions.