1 / 11

Understanding Sensory Signals: From Detection to Perception

Dive into the intricacies of detecting sensory signals and how our brain interprets them with signal detection theory. Explore the eye's retina, illusions, threshold measurement, and eye movements during reading.

neith
Download Presentation

Understanding Sensory Signals: From Detection to Perception

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. Chapter 3: Detection of Sensory Signals Sensation: activity of receptor organs Perception: interpretation of sensory system activity Absolute vs. Difference Thresholds Thresholds affected by stimulus energy and motivation of subject to detect signal Signal Detection theory: method of combining factors to more accurately measure thresholds.

  2. Eye

  3. Retina and photoreceptors

  4. Rods: 125 mil; low light; color blind; peripherally located Cones: 7mil; daylight; color vision; centrally located

  5. Illusions: Hermann Grid

  6. Illusions: Rotating snakes

  7. Illusions: Muller Lyer

  8. Ambiguous figures

  9. Signal Detection Theory 100 % Hits 50 0 100 0 50 % False Alarms

  10. Eye movements during reading

  11. Perceptual Span: How much info gathered in brief glance at visual pattern? • Relevance to reading • Saccadic eye movements: .25sec • Early studies: 4.5 unconnected letters; whole report technique; ‘reading off visual icon’ • 1960 Partial report technique of George Sperling H K Z High tone P L V Medium tone T M Q Low tone

More Related