Article Id 165

Volume 6, Number 3, Year 2004




The effect of Training on Interrater Reliability in Dream Content Analysis


Michael Schredl, Ph.D., Natalie Burchert, Ph.D., and Yvonne Gabatin, Ph.D.




Content analysis is an important and a frequently applied tool in dream research. Hall and Van de Castle (1) stressed the importance of interrater reliability in the application of content analytic scales, i.e., how good is the agreement between two judges scoring the same dream material independently? The present study investigated the effect of rater training on the interrater reliability of scales developed by Schredl (2). Three samples of 100 dream reports each have been analyzed by two inexperienced judges who received two training sessions after coding 100 and 200 dreams. The results indicate that the training of raters has a positive effect on interrater reliability and the mean differences of some scales (nominal and interval scales) but not for ordinal scales (e.g., dream emotions). It remains unclear how much training is necessary for different scales and whether it might be necessary to improve the scales themselves if extensive training does not result in a desired improvement in interrater relibility. Thus, more studies investigating rater training for different systems of dream content analysis are needed. (Sleep and Hypnosis 2004;6(3):139-144)



Keywords: dream content analysis, interrater reliability, rater training
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