Intersensory interactions predicted by the sensory precision hypothesis have been infrequently examined by distorting the reliability of size perception by touch. Consequently, participants were asked to see one size and manually feel another unseen size either with bare fingers or with fingers sleeved in rigid tubes to decrease the precision of touch. Their subsequent visual estimates of the perceived size favored the more precise modality. Experiment 1 (N = 46) varied the intersensory discordance to examine whether the estimate arose from trivial response biases or from perceptual binding effects. Experiment 2 (N = 32) examined the presence of the perceptual effect in the absence of discordant sensory cues. Results favored a perceptual interpretation because the haptic and visual cues merged regardless of the discordance amount only when the stimulation arose from separate sources. The observed interaction between touch imprecision and visual bias is consistent with computational models of optimal perception.

通过感觉扭曲大小感知的可靠性，很少检查由感觉精确度假设预测的感觉间相互作用。因此，要求参与者看到一种尺寸，然后用裸露的手指或用手指套在硬管中的手指手动感觉另一种看不见的尺寸，以降低触摸的精度。他们随后对感知尺寸的视觉估计支持更精确的模态。实验1（N = 46）改变了感官间的不一致，以检查估计值是来自琐碎的响应偏差还是来自感知结合效应。实验2（N = 32）在没有不一致的感觉线索的情况下检查了感知效果的存在。结果有利于感知解释，因为仅当刺激来自不同的来源时，触觉和视觉提示才会合并，而不管不一致的程度如何。观察到的触摸不精确和视觉偏差之间的相互作用与最佳感知的计算模型一致。