自闭症谱系障碍中视敏度的心理物理学测量
Psychophysical measures of visual acuity in autism spectrum conditions.
作者信息
Tavassoli Teresa, Latham Keziah, Bach Michael, Dakin Steven C, Baron-Cohen Simon
机构信息
Autism Research Centre, Department of Psychiatry, University of Cambridge, UK.
出版信息
Vision Res. 2011 Aug 1;51(15):1778-80. doi: 10.1016/j.visres.2011.06.004. Epub 2011 Jun 16.
Abstract
Previously reported superior visual acuity (VA) in autism spectrum conditions (ASC) may have resulted from methodological settings used (Ashwin, Ashwin, Rhydderch, Howells, & Baron-Cohen, 2009). The current study re-tested whether participants with (N=20) and without (N=20) ASC differ on psychophysical measures of VA. Participants' vision was corrected before acuity measurement, minimising refractive blur. VA was assessed with an ETDRS chart as well as the Freiburg Visual Acuity and Contrast Test (FrACT). FrACT testing was undertaken at 4m (avoiding limitations of pixel-size), using 36 trials (avoiding fatigue). Best corrected VA was significantly better than the initial habitual acuity in both groups, but adults with and without ASC did not differ on ETDRS or FrACT binocular VA. Future research should examine at which level of visual processing sensory differences emerge.
摘要
先前报道的自闭症谱系障碍（ASC）患者具有更好的视力（VA），这可能是由于所采用的方法学设置所致（阿什温、阿什温、里德奇、豪厄尔斯和巴伦 - 科恩，2009年）。本研究重新测试了患有（N = 20）和未患有（N = 20）ASC的参与者在视力的心理物理学测量方面是否存在差异。在进行视力测量之前对参与者的视力进行了矫正，以尽量减少屈光性模糊。使用ETDRS视力表以及弗莱堡视力和对比度测试（FrACT）对视力进行评估。FrACT测试在4米距离进行（避免像素大小的限制），采用36次试验（避免疲劳）。两组的最佳矫正视力均显著优于初始的习惯视力，但患有和未患有ASC的成年人在ETDRS或FrACT双眼视力方面没有差异。未来的研究应考察在视觉处理的哪个层面出现感觉差异。
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