The Role of Top-down and Bottom-up Processes in Guiding Eye Movements during Visual Search

نویسندگان

  • Gregory J. Zelinsky
  • Wei Zhang
  • Bing Yu
  • Xin Chen
  • Dimitris Samaras
چکیده

To investigate how top-down (TD) and bottom-up (BU) information is weighted in the guidance of human search behavior, we manipulated the proportions of BU and TD components in a saliency-based model. The model is biologically plausible and implements an artificial retina and a neuronal population code. The BU component is based on feature-contrast. The TD component is defined by a feature-template match to a stored target representation. We compared the model’s behavior at different mixtures of TD and BU components to the eye movement behavior of human observers performing the identical search task. We found that a purely TD model provides a much closer match to human behavior than any mixture model using BU information. Only when biological constraints are removed (e.g., eliminating the retina) did a BU/TD mixture model begin to approximate human behavior.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Saliency and Task-Based Eye Movement Prediction and Guidance

The ability to predict and guide viewer attention has important applications in computer graphics, image and scene understanding, object detection, visual search and training. Human eye movements have interested researchers as they provide insight into the cognitive processes involved in task performance. It has also interested researchers to understand what guides viewer attention in a scene. ...

متن کامل

Event-Related Potentials of Bottom-Up and Top-Down Processing of Emotional Faces

Introduction: Emotional stimulus is processed automatically in a bottom-up way or can be processed voluntarily in a top-down way. Imaging studies have indicated that bottom-up and top-down processing are mediated through different neural systems. However, temporal differentiation of top-down versus bottom-up processing of facial emotional expressions has remained to be clarified. The present st...

متن کامل

The effect of bottom-up and top-down auditory program training on the development of children's auditory processing skills

Although there have been several previous investigations on the role of auditory training for the development of auditory processing skills, it still remains unknown whether children with auditory processing difficulties can get improved auditory skills after exposure to a multi-modal training experience comprising both visual and tactile stimuli. The present study, therefore, attempted to use ...

متن کامل

The effect of bottom-up and top-down auditory program training on the development of children's auditory processing skills

Although there have been several previous investigations on the role of auditory training for the development of auditory processing skills, it still remains unknown whether children with auditory processing difficulties can get improved auditory skills after exposure to a multi-modal training experience comprising both visual and tactile stimuli. The present study, therefore, attempted to use ...

متن کامل

On The Bottom-Up and Top-Down Influences of Eye Movements

To cope with the enormous amount of visual information in our everyday environment, the human visual system uses a mechanism of visual attention and saccadic eye movements to filter and process only the relevant information. In this study, we try to analyze and model the control of these eye movements. Eye movements are controlled by bottom-up and topdown mechanisms. The role of these two mecha...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2005