Reduced visual acuity is mirrored in low vision imagery.
Reduced visual acuity is mirrored in low vision imagery.
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DOI：
10.1111/bjop.12493
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发表时间：
2021-08
期刊：
影响因子：
--
通讯作者：
Clark D
中科院分区：
文献类型：
--
作者：
Arditi A;Legge G;Granquist C;Gage R;Clark D
研究检查了视力正常和失明的受试者的视觉意象的性质，但没有检查视力低下的受试者的视觉意象的性质。对视力正常的受试者的研究结果表明，意象涉及大脑的主要视觉区域。由于视觉皮层的可塑性在成年期似乎受到限制，因此我们可能预计那些成年后视力低下的人的图像相对不会受到这些损失的影响。但如果视觉图像是基于最近和当前的经验，我们预计弱视者的图像具有视觉感知受损的一些特性。我们使用意象调查问卷，检查了视力正常的受试者报告的心理图像的关键参数，与早发性和迟发性低视力的受试者以及一组视野受限的受试者进行比较。我们发现证据表明，视力下降的人报告物体的图像距离比视力正常的人更近，并且用图像的分辨率比视力正常的人描绘物体的分辨率更低。我们还发现，所有低视力群体（如视力正常的人），对物体进行成像的距离远大于当要求将它们放置在“正好适合”其图像视野的距离（溢出距离）时。所有低视力群体，就像视力正常的人一样，都表现出图像视野有限的证据，但我们视野受限的群体在这方面与其他群体没有什么不同。我们得出的结论是，低视力者的图像与视力正常者的图像相似，取决于所成像的物体或特征的大小，但这也反映了他们视力下降的情况。我们没有发现任何证据表明对发病年龄或视力障碍年数的意象有依赖性。
Research has examined the nature of visual imagery in normally sighted and blind subjects, but not in those with low vision. Findings with normally sighted subjects suggest that imagery involves primary visual areas of the brain. Since the plasticity of visual cortex appears to be limited in adulthood, we might expect imagery of those with adult-onset low vision to be relatively unaffected by these losses. But if visual imagery is based on recent and current experience, we would expect images of those with low vision to share some properties of impaired visual perception. We examined key parameters of mental images reported by normally sighted subjects, compared to those with early- and late-onset low vision, and with a group of subjects with restricted visual fields using an imagery questionnaire. We found evidence that those with reduced visual acuity report the imagery distances of objects to be closer than those with normal acuity, and also depict objects in imagery with lower resolution than those with normal visual acuity. We also found that all low vision groups, like the normally sighted, image objects at a substantially greater distance than when asked to place them at a distance that “just fits” their imagery field (overflow distance). All low vision groups, like the normally sighted, showed evidence of a limited visual field for imagery, but our group with restricted visual fields did not differ from the other groups in this respect. We conclude that imagery of those with low vision is similar to that of those with normal vision in being dependent on the size of objects or features being imaged, but that it also reflects their reduced visual acuity. We found no evidence for a dependence on imagery of age of onset or number of years of vision impairment.
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DOI：
10.1037/a0020413
发表时间：
2011-02
影响因子：
2.1
作者：
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通讯作者：
Oliva, Aude
影响因子：
1.6
作者：
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Pezzulo, Giovanni
DOI：
10.1037/0096-1523.18.1.241
发表时间：
1992-02-01
影响因子：
2.1
作者：
FARAH, MJ;SOSO, MJ;DASHEIFF, RM
通讯作者：
DASHEIFF, RM
DOI：
10.1037/0096-1523.6.1.126
发表时间：
1980-01-01
影响因子：
2.1
作者：
FINKE, RA;KOSSLYN, SM
通讯作者：
KOSSLYN, SM
影响因子：
2.4
作者：
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