Accuracy of Rats in Discriminating Visual Objects Is Explained by the Complexity of Their Perceptual Strategy.
Accuracy of Rats in Discriminating Visual Objects Is Explained by the Complexity of Their Perceptual Strategy.
复制标题
DOI：
10.1016/j.cub.2018.02.037
复制
发表时间：
2018-04-02
期刊：
影响因子：
--
通讯作者：
Zoccolan D
中科院分区：
文献类型：
--
作者：
Djurdjevic V;Ansuini A;Bertolini D;Macke JH;Zoccolan D
尽管啮齿动物作为视觉功能的模型越来越受欢迎，但目前尚不清楚啮齿动物在进行视觉对象识别时是否能够运用先进的形状处理策略。例如，据报道，在大鼠身上，图案视觉的范围从仅仅检测整体物体亮度到对辨别形状特征的视觉不变处理。在这里，我们试图澄清啮齿类动物的视觉精细化程度，以及它们的视觉处理策略的复杂性在不同个体之间的差异程度。为了达到这个目的，我们测量了老鼠从11个干扰物中区分参考对象的能力，这些干扰物跨越了与参考对象图像级别相似的光谱。我们还向动物呈现了随机变化的参考，并处理了它们对这些刺激的反应，以得出特定主题的大鼠知觉选择模型。我们的模型成功地捕捉到了在主体和客体条件下观察到的高度可变的辨别性能。特别是，他们发现，在最具挑战性的干扰因素下取得成功的动物，是那些将更广泛的区别性特征整合到感知策略中的动物。关键的是，当要求大鼠辨别刺激的轮廓和比例版本时，这些策略在很大程度上得到了保留，从而表明大鼠物体的视觉可以被描述为一个容忍变换的、基于特征的过滤过程。总体而言，这些发现表明，大鼠能够对形状信息进行高级处理，并指出啮齿类动物是研究视觉对象识别和其他高级视觉功能的神经元基础的强大模型。大鼠辨别视觉对象的能力在不同受试者中差异很大，这种差异是由于大鼠感知策略的多样性动物建立更丰富的感知模板实现更高的准确性感知策略在对象变换中基本保持不变。研究表明，老鼠成功辨别视觉对象的能力取决于其感知策略的复杂性，而在对象外观变化的情况下，这一策略在很大程度上保持不变。这意味着老鼠处理视觉物体的机制与进化程度更高的物种，如灵长类动物没有什么不同。
Despite their growing popularity as models of visual functions, it remains unclear whether rodents are capable of deploying advanced shape-processing strategies when engaged in visual object recognition. In rats, for instance, pattern vision has been reported to range from mere detection of overall object luminance to view-invariant processing of discriminative shape features. Here we sought to clarify how refined object vision is in rodents, and how variable the complexity of their visual processing strategy is across individuals. To this aim, we measured how well rats could discriminate a reference object from 11 distractors, which spanned a spectrum of image-level similarity to the reference. We also presented the animals with random variations of the reference, and processed their responses to these stimuli to derive subject-specific models of rat perceptual choices. Our models successfully captured the highly variable discrimination performance observed across subjects and object conditions. In particular, they revealed that the animals that succeeded with the most challenging distractors were those that integrated the wider variety of discriminative features into their perceptual strategies. Critically, these strategies were largely preserved when the rats were required to discriminate outlined and scaled versions of the stimuli, thus showing that rat object vision can be characterized as a transformation-tolerant, feature-based filtering process. Overall, these findings indicate that rats are capable of advanced processing of shape information, and point to the rodents as powerful models for investigating the neuronal underpinnings of visual object recognition and other high-level visual functions. The ability of rats to discriminate visual objects varies greatly across subjects Such variability is accounted for by the diversity of rat perceptual strategies Animals building richer perceptual templates achieve higher accuracy Perceptual strategies remain largely invariant across object transformations Djurdjevic et al. show that the ability of rats to successfully discriminate visual objects depends on the complexity of their perceptual strategy, which remains largely unchanged under variations in object appearance. This implies that rats process visual objects using mechanisms not dissimilar from those of more evolved species, such as primates.
登录
查看更多内容
影响因子：
1.8
作者：
Gosselin, F;Schyns, PG
通讯作者：
Schyns, PG
DOI：
10.1101/lm.034355.114
发表时间：
2014-10
期刊：
Learning & memory (Cold Spring Harbor, N.Y.)
影响因子：
--
作者：
Gavornik JP;Bear MF
通讯作者：
Bear MF
影响因子：
2.5
作者：
Histed, Mark H.;Carvalho, Lauren A.;Maunsell, John H. R.
通讯作者：
Maunsell, John H. R.
DOI：
10.1093/cercor/bhw196
发表时间：
2016-10-01
期刊：
Cerebral cortex (New York, N.Y. : 1991)
影响因子：
--
作者：
Ince RAA;Jaworska K;Gross J;Panzeri S;van Rijsbergen NJ;Rousselet GA;Schyns PG
通讯作者：
Schyns PG
影响因子：
9.2
作者：
Gibson, Brett M.;Lazareva, Olga F.;Wasserman, Edward A.
通讯作者：
Wasserman, Edward A.