Active learning ideas
This topic introduces the distinction between sensation (the physical process of receiving stimuli) and perception (the brain's interpretation of that stimuli). Students explore how we navigate a three-dimensional world using two-dimensional retinal images. They study binocular cues, like retinal disparity, and monocular cues, such as height in plane and relative size.
Activity 01
Students use cameras or sketchbooks to find examples of monocular depth cues (like linear perspective or occlusion) around the school grounds. They then present their findings, explaining how each cue tricks the brain into seeing depth.
What is the difference between sensation and perception?
Activity 02
Students perform the 'hole in the hand' illusion using a paper tube to experience retinal disparity. They then discuss in pairs how their brain tried to resolve the conflicting information from both eyes.
How do we perceive depth?
Activity 03
Set up stations with objects viewed from different angles or under different lighting. Students record their sensations (what they actually see) versus their perceptions (what they know the object is) to understand shape and colour constancy.
What are visual constancies?
A few notes on teaching this unit
Watch Out for These Misconceptions
Sensation and perception are the same thing.
Sensation is the 'raw data' from the senses, while perception is the 'meaning' the brain gives it. Using optical illusions where the sensation stays the same but the perception changes helps students see the difference.
We only need one eye to see depth perfectly.
While monocular cues help, binocular cues like retinal disparity are essential for accurate depth perception at close range. A simple 'pencil-touching' task with one eye closed quickly demonstrates the limitations of monocular vision.
Methods used in this brief
Visual Illusions
This topic delves into visual illusions and how they trick the brain. Students will analyse examples such as the Müller-Lyer and Ponzo illusions to understand perceptual errors.
8 methodologies
Theories of Perception
Students will compare Gibson's direct theory of perception with Gregory's constructivist theory. They will evaluate the strengths and weaknesses of nature versus nurture in perceptual abilities.
8 methodologies