Week 4-1: Displays, Perceptual Attentional Constraints

1. 1 Week 4-1: Displays, Perceptual & Attentional Constraints This module will provide you with a general overview of the needs assessment process. Later modules will provide more detail on the steps involved. This module will provide you with a general overview of the needs assessment process. Later modules will provide more detail on the steps involved.

2. 2 Week 4 Topics Lecture 4-1 Perceptual Filters Displays and Attention Visual Search Lecture 4-2 Perceptual Organization Spatial Proximity and pre-attentive processing Object Displays

3. Perceptual Systems How does energy become a perception? Perceptual systems act as filters (HT < HS) Some data filtered due to limitations of perceptual systems, e.g. resolution of fine detail bottom-up (or passive) filtering Some data filtered due to current goals: we “choose” to ignore the data and attend something else, e.g., the hardness of the chair you’re sitting on top-down (or active) filtering with attention 3 There is more information in the world than we can possibly perceive. We perceive but a tiny slice of reality What kind of filtering resulted in the air crash simulated in the video? Altimeter was clearly visible -- but not located near the faulty landing gear indicator Auditory “change in altitude” warning was clearly audible There is more information in the world than we can possibly perceive. We perceive but a tiny slice of reality What kind of filtering resulted in the air crash simulated in the video? Altimeter was clearly visible -- but not located near the faulty landing gear indicator Auditory “change in altitude” warning was clearly audible