1 / 18

Weighting mechanisms in (visual) information processing

Weighting mechanisms in (visual) information processing. Dragan Rangelov Michael Zehetleitner, Hermann Müller. A brief introduction. Information processing: Selection of task relevant items Analysis of the selected items’ properties Feature-to-response mapping Response production

tweller
Télécharger la présentation

Weighting mechanisms in (visual) information processing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Weighting mechanisms in(visual) information processing Dragan Rangelov Michael Zehetleitner, Hermann Müller

  2. A brief introduction • Information processing: • Selection of task relevant items • Analysis of the selected items’ properties • Feature-to-response mapping • Response production • All of them are present in any single task

  3. Selection and priming in visual search • Treisman, 1988 Expectancy benefits

  4. Intertrial priming effects • Müller et al (1995) Intertrial priming

  5. Selection and dimension weighting wc wo

  6. Alternative accounts • Mortier et al (2005) Intertrial priming

  7. Problem • Does the same or different weighting systems drive priming effects in detection and discrimination tasks? • YES – there should be significant intertrial priming even when the task changes between two trials • NO – intertrial priming effects are task specific

  8. Paradigm • Two tasks: • Singleton detection • Feature discrimination • Two dimensions • Color • Orientation • Mixed within the same block of trials

  9. Experiment 1 • 12 participants (7 female, mean age 25) • Alternating runs task sequence • Random dimension change sequence • For n-1 and n-3 intertrial distance

  10. Detection task Discrimination task

  11. Experiment 2 • 12 participants (6 female, mean age 25 years) • Randomized task sequence • Randomized dimension change sequence • For n-1 and n-2 intertrial distance

  12. Detection task Discrimination task

  13. Experiment 3 • 11 participants (4 female, mean age 25 years) • Only discrimination task • With and without distractors displays • For n-1 and n-2 intertrial distance

  14. Distractors No distractors

  15. Summary and conclusions • Intertrial priming is task specific • Effects survive several task switches • Priming generalizes across display types • Hypotheses • There are several weighting systems taking place at different processing stages • Similar dynamics but additive relation between different weighting systems

  16. Dimension weighting lab • Prof. Dr. Hermann Müller • Dr. Michael Zehetleitner • Dr. Thomas Töllner

  17. Thanks for your attention

More Related