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Abstract. We present a novel data analytic approach used to analyze changes in visual artworks over time. Drawing on principles of art historical criticism, we devised a comprehensive coding scheme that captures both technical and content attributes. After establishing inter-rater agreement, the researcher team applied the coding scheme to 414 pieces of adolescent artwork published in a teen art and literary magazine between 1990 and 2011. Analyses of the occurrence of each code revealed notable changes in adolescent creative production over the twenty-year period that we investigated. Applying this analytic approach to a portfolio of visual art can yield insights into artworks, their creators, and nuanced changes in creative production over time.