Use of concurrent variable-interval performances confirms that more-complex visual patterns have greater reinforcement value for human subjects than less-complex patterns. The findings tally with verbal evaluative ratings and with results of previous experiments using a discrete-trial binary-choice technique.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1334013 | PMC |
http://dx.doi.org/10.1901/jeab.1972.18-281 | DOI Listing |
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