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Percentages that pTP(6,8,9), α = 0.25, …, 0.75 (left panel) and pTP(7,8,10), α = 0.25, …, 0.75 (right panel) were judged as higher in pitch than pTP(7,8,9), α = 0.5. The interpolated α values with 50 % responses (gray lines) for pTP(6,8,9) and pTP(7,8,10) are shown for each subject.
