Computer-animated stimuli to measure motion sensitivity: constraints on signal design in the Jacky dragon.
Computer-animated stimuli to measure motion sensitivity: constraints on signal design in the Jacky dragon.
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DOI：
10.1093/cz/zow074
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发表时间：
2017-03
期刊：
影响因子：
2.2
通讯作者：
Burke D
中科院分区：
文献类型：
--
作者：
Woo KL;Rieucau G;Burke D
识别感知阈值对于理解信号进化背后的机制至关重要。使用电脑动画刺激，我们检查了Jacky dragon Amphibolurus muricatus的视觉速度敏感性，这是一种在社会交流中广泛使用快速运动模式的物种。首先，用随机点运动图显示速度、连贯性和方向的组合，对焦点蜥蜴进行辨别试验。其次，我们通过对虚拟刺激的一系列行为反应（例如定向反应、反应延迟），测量了实验对象蜥蜴预测次级强化物（蟋蟀、蜘蛛和螨虫等三种不同的无脊椎动物的计算机生成动画中的一种）出现的能力，这种能力是基于漂移点场的运动方向。我们发现了速度和连贯性的影响，以及这两个因素之间的相互作用对移动刺激的感知。总的来说，我们的研究结果表明，成龙对高速有敏锐的敏感性。然后，我们采用光流分析来匹配生态相关运动的性能。我们的研究结果表明，Jacky dragon的视觉系统可能是为了检测快速运动而形成的。这种预先存在的敏感性可能限制了同视显示的进化。相比之下，Jacky龙在探测埋伏的捕食者（如蛇和一些无脊椎猎物）的运动方面可能有困难。我们的研究还证明了计算机动画刺激技术在进行非侵入性测试以探索视觉介导物种的运动范围和灵敏度方面的潜力。
Identifying perceptual thresholds is critical for understanding the mechanisms that underlie signal evolution. Using computer-animated stimuli, we examined visual speed sensitivity in the Jacky dragon Amphibolurus muricatus, a species that makes extensive use of rapid motor patterns in social communication. First, focal lizards were tested in discrimination trials using random-dot kinematograms displaying combinations of speed, coherence, and direction. Second, we measured subject lizards’ ability to predict the appearance of a secondary reinforcer (1 of 3 different computer-generated animations of invertebrates: cricket, spider, and mite) based on the direction of movement of a field of drifting dots by following a set of behavioural responses (e.g., orienting response, latency to respond) to our virtual stimuli. We found an effect of both speed and coherence, as well as an interaction between these 2 factors on the perception of moving stimuli. Overall, our results showed that Jacky dragons have acute sensitivity to high speeds. We then employed an optic flow analysis to match the performance to ecologically relevant motion. Our results suggest that the Jacky dragon visual system may have been shaped to detect fast motion. This pre-existing sensitivity may have constrained the evolution of conspecific displays. In contrast, Jacky dragons may have difficulty in detecting the movement of ambush predators, such as snakes and of some invertebrate prey. Our study also demonstrates the potential of the computer-animated stimuli technique for conducting nonintrusive tests to explore motion range and sensitivity in a visually mediated species.
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影响因子：
2.9
作者：
FLEISHMAN, LJ
通讯作者：
FLEISHMAN, LJ
影响因子：
1.8
作者：
Bex, PJ;Metha, AB;Makous, W
通讯作者：
Makous, W
影响因子：
2.7
作者：
Goto, K;Lea, SEG;Dittrich, WH
通讯作者：
Dittrich, WH
影响因子：
2.7
作者：
Burnat, K;Vandenbussche, E;Zernicki, B
通讯作者：
Zernicki, B
DOI：
10.3758/bf03207616
发表时间：
1999-08-01
期刊：
PERCEPTION & PSYCHOPHYSICS
影响因子：
--
作者：
Bischof, WF;Reid, SL;Spetch, ML
通讯作者：
Spetch, ML