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. Author manuscript; available in PMC: 2011 Jul 9.
Published in final edited form as: Vision Res. 2010 Apr 24;50(15):1452–1461. doi: 10.1016/j.visres.2010.04.013

Figure 2.

Figure 2

Psychophysical procedure. Two-interleaved staircases began with one longer period of adaptation (30sec) to an image that had been either blurred or sharpened, followed by a blank (0.5sec) and a briefly presented test image (0.5sec). The observers answered whether the test image was too blurred or too sharp compared to their internal reference for image focus. Top-up, readapting images were shown between the brief test images presentations. In this example, the observers adapted to an image which had been blurred by a relative slope of −0.50 in both staircases. Only the starting level of the test target differed between the two staircases.