The over-all aim of this experiment was to explore limits of Ss' conceptual ability to solve problems of high complexity when relevant cues were in the background, i.e., not part of the stimulus figure. Results showed Ss made significantly more errors in concept learning when relevant cues were in the background than on the stimulus figure. The majority of Ss reached limits when concept complexity was 8 bits, with 75% failing to reach criterion to solution when background cues were relevant and 17% when relevant cues were part of the geometric figures.