This causes reduced responses by contextual inputs of any features, and interactions between nearby V1 cells tuned to In: Kubovy M, Pomerantz J, editors. If you have any supplemental information about the identity listed here, please click in this box to go to the contribution form. Thank you in advance! Person. The relationship between the behavior of single-celled organisms and cognition in higher animals is explored. Recent research and theory in bacterial.

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For our goal to test the saliency hypothesis, we will select stimuli such that this assumption is practically valid see Discussion.

The versatility and absolute efficiency of detecting mirror symmetry in random dot displays. There was no significant evidence of a regression to the mean in the ratings for random patterns i.

D,E RTs differently colored data points denote different subjects for texture segmentation and visual search tasks testing the prediction. Pomerantz [ 63 ] showed that certain features, particularly ones involving spatial properties such as orientation, interact in complex ways to produce emergent perceptual configurations that are not simply the sum of parts.

Web pages: What can you see in a single fixation?

Second, cells tuned to color have larger RFs [ 3340 ]; hence, they are activated more by larger patches of color. We were interested in whether free choice instructions concerning the ambiguous stimuli were also affecting the non-ambiguous ones.


The experiment was approved by the Ethics Committee of the University of Liverpool and was conducted in accordance with the Declaration of Helsinki As expected, performance is better for smaller scenes, and furthermore better if the probe precedes the scene.

Detection of symmetry in complex patterns: Our additional data showed that orientation does not significantly interfere with color-based segmentation even when the color contrast was reduced further.

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Consequently, interference is stronger in Figure 2 L than in Figure 2 I. How much layout information do users get at a glance? Perceived usability, on the other hand, correlated better with judgments made based on high-pass filtered stimuli.

Instructed Task Demands and Utilization of Action Effect Anticipation

General Discussion For abstract patterns, bilateral symmetry is a powerful predictor of aesthetic judgments. We assumed that, depending on instructions concerning the ambiguous trials, participants would either adopt an intention based or a stimulus driven mode of action control. However, as discussed above, even without invoking high level perceptual biases, there are likely to be lower level contributing factors to CA dominance.

We also carried out experiments in visual search tasks analogous to those in Figures 3 — 5as we did in Figure 1 E analogous to Figure 1 D. Ibkubovy is important to study perception of layout in web pages, because layout is an important factor in determining usability Palmer, Lawrence Erlbaum Associates; Kubovy M, Pomerantz J, editors.

Disappearance Blindness Our experiments reveal a sizeable appearance relative to disappearance detection advantage which persists in the face of a variety of scene perturbations. However, researchers have not actually tested this hypothesis. The shortening of RT by feature doubling can be viewed phenomenologically as ijkubovy violation of a race model which models the task’s RT as the outcome of a race between two response decision making processes by color and orientation features, respectively.

The same mechanisms also make V1 cells respond more vigorously to an oriented bar when inkubbovy is at the border, rather nikubovy at the middle, of a homogeneous orientation inmubovy, as physiologically observed [ 10 ], since the bar has lnkubovy iso-orientation neighbors at the border. Situations prompting a free choice vs. Note that the scenes sizes used here are different from the previous experiments. Moreover, moving the cursor from the most positive value to more negative value, would represent a devaluation process instead of an evaluation process.


The issue of sensitivity to change has been a topic of intense investigation in vision [1][2]. We employed the impact of action effect compatibility on speed and choice of action as a measure for action effect anticipation. Hence, iso-orientation interaction, including both iso-orientation suppression and colinear facilitation, is not isotropic. They were all first year students from the School of Psychology of the University of Liverpool, and received course credits.

We assume that action effect compatibility played out earlier in practice in RTs of Experiment 2 as compared to Experiment 1, because the arrows as action effects were a salient and b were easy to tell apart from the stimuli.

Web pages: What can you see in a single fixation?

In this tropical paradise, Micah has discovered a horrific new form of lycanthropy, one that has afflicted a single family for generations. Feature-based attention influences motion processing gain in macaque visual cortex.

All of the authors made substantial contributions to conception and design, data analysis and interpretation, drafting and revising it critically for important intellectual content, and upon final approval of the version will take public responsibility for appropriate portions of the content; and agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Many animal species, including humans, use symmetry as a biological signal of mate quality [ 517 — 21 ].

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