"Judgments of the complexity of 24 familiar and 36 unfamiliar random shapes of matched physical complexity were obtained from 55 Ss. Familiarization was accomplished with a 10-trial paired-associate learning session 48 hr. prior to the complexity judging session. The familiar shapes were judged to be significantly less complex than the unfamiliar shapes." (PsycINFO Database Record (c) 2006 APA, all rights reserved)