Noor holds one pencil close to her face and another at arm's length, both in front of a poster on the far wall. When she closes each eye in turn, the close pencil appears to jump much further across the poster than the pencil at arm's length.
Explain how this demonstrates stereopsis.
52 exam-style questions on Edexcel GCSE Psychology 8.1 Perception, covering 8.1.1 Depth cues, illusions and constancies, 8.1.2 Direct Theory of Perception (Gibson, 1996), 8.1.3 Constructivist Theory of Perception (Gregory, 1970), and 8.1.4 Effects on perceptual set. Each one has a worked solution and a mark scheme showing where the marks go.