This study examines the factor structure of scores on the Four Dimension Mood Scale (4DMS) developed by Huelsman, Nemanick, and Munz in response to criticisms of the Positive and Negative Affect Schedule. The results showed that the factor structure of 4DMS scores obtained with a sample of U.K. residents assessed for state affect corresponded closely to that obtained by Huelsman et al. with hospital employees in the United States who were assessed for trait affect. The four-factor model provided a reasonably good fit to the scores and fitted better than one-factor or two-factor models, thus favoring a four-dimension model of affect. It was concluded that the 4DMS is appropriate for use in the United Kingdom with comparable samples. The study identified differences in composition of the 4DMS and Thayer's Activation Deactivation Adjective Check List, especially in the Tiredness scale, and areas for further investigation of the 4DMS
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