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    Lump detection in simulated human breasts

    Sixteen observers palpated silicone models of human breasts containing lumps 1.6-12.1 mm in diameter. Detectability depended on the size of the lump, producing a systematic psychometric function. In eight obse...

    Calvin K. Adams, Deborah C. Hall, H. S. Pennypacker in Perception & Psychophysics (1976)