![]() ![]() ![]() ![]() Independent of whether brain signals reflect differences across object categories through low-level features or high-level decision making (Rousselet, Husk, Bennett, & Sekuler, 2008 VanRullen & Thorpe, 2001b), these studies demonstrate how fast information about objects can be extracted, represented, and used. For example, the human and monkey brain can accurately distinguish between specific classes of objects within 45 ms (Mouchetant-Rostaing, Giard, Delpuech, Echallier, & Pernier, 2000) to 150 ms (Thorpe, Fize, & Marlot, 1996 VanRullen & Thorpe, 2001b) and instantiate a behavioral reaction to them within about 120 ms (Kirchner & Thorpe, 2006). The well-developed character of this skill is expressed in the accuracy and speed at which we can process objects in natural scenes (Potter & Levy, 1969). Without this skill, we would not be able to recognize components of our visual field as, for instance, potentially useful or threatening. Our visual system is optimized to detect, classify, and identify objects that we encounter in everyday life. In sum, rapid visual processing depends on contrasts between target and background features rather than overall visual context, is negatively affected by anxiety, and finds its processing stages differentially reflected in the pupillary response. Remarkably, images of threatening animals induced smaller pupil sizes, and observers with higher mean anxiety ratings had smaller pupils on average. Pupil size correlated with detection, identification, and emotional valence judgments at different time points after image presentation. Surprisingly, animals associated with lower anxiety were detected faster and identified with higher confidence, and emotional affect was a better predictor of performance than anxiety. We found that detection and identification improved with increasing image luminance, background contrast, animal saturation, and luminance plus color contrast between target and background. In a second experiment, the same observers rated images with respect to their emotional affect and estimated their anxiety when imagining a real-life encounter with the depicted animal. Here, we briefly presented natural images and asked observers to report the presence or absence of an animal (detection), species of the detected animal (identification), and their confidence. ![]() At which processing stage these factors operate and how they interact has remained largely unaddressed. Low-level image features and emotional valence affect such processing but have mostly been studied in isolation. We offer you a wide selection of images that are perfect for any project.Humans process natural scenes rapidly and accurately. This means that you can download PNG images without losing any quality, and they will be perfect to use in your project. PNG (Portable Network Graphics) is a file format that supports transparency and allows for lossless compression. One great option is to download free PNG images from TopPNG But finding the right one can be a challenge, especially if you're working on a tight budget. When you're working on a creative project, it's important to get high-quality images. animals fighting predators tigers wallpaper and download free photo png stock pictures and transparent background with high quality.This file is all about PNG and it includes animals fighting predators tigers wallpaper tale which could help you design much easier than ever before.Best Free png HD animals fighting predators tigers wallpaper, background png file easily with one click Free HD PNG images, png design and transparent background with high quality ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |