Chapter 4 Bellringer If you had to choose one of your senses to lose which one would it be and why? -------------------------------------------------------------------

Chapter 4 SENSATION AND PERCEPTION HOLT Psychology 2/4/2018 Chapter 4 SENSATION AND PERCEPTION Section 1: Sensation and Perception: The Basics Section 2: Vision Section 3: Hearing Section 4: Other Senses Section 5: Perception Chapter 4

Sensation and Perception: The Basics Chapter 4 Chapter 4: Section 1 Sensation and Perception: The Basics

Chapter 4 Main Objective: Distinguish between sensation and perception, and explain how they contribute to an understanding of our environment.

CHAPTER 4 Chapter 4 Senses Sensation and Perception Vision Hearing Smell Touch Taste Body Senses

What is Sensation and Perception?????? Chapter 4 What is Sensation and Perception?????? Sensation: The stimulation of sensory receptors and the transmission of sensory information to the central nervous system (the spinal cord and brain). Perception: Psychological process through which we interpret sensory stimulation. EX: We realize that the people on a small TV are bigger in real life.

Signal-detection theory Sensory adaptation Chapter 4 Stimulation of senses and the ways in which people interpret that stimulation are affected by several concepts: Absolute threshold Difference Threshold Signal-detection theory Sensory adaptation

Absolute Threshold: Absolute Threshold: Chapter 4 The weakest amount of a stimulus that can be sensed. EX: Hearing the first beep in a hearing test. Dogs can hear and smell things that people cannot…they have a different threshold. Thresholds differ from person to person!

Difference Threshold: Chapter 4 Difference Threshold: Difference threshold: The minimum amount of difference that can be detected between two stimuli. EX: differences in shades of color.

Signal-Detection Theory: Chapter 4 Signal-Detection Theory: A method of distinguishing sensory stimuli that takes into account not only their strengths but also such elements as the setting, your physical state, your mood, your attitudes, and motivation. EX: Mind wandering in class… you still hear but your mind will wander.

Chapter 4 Sensory Adaptation: The process by which we become more sensitive to weak stimuli and less sensitive to unchanging stimuli. Sensory systems adapt to changing environment. Seeing people in movie theater (weak stimuli) City dwellers adapt to sounds of traffic (unchanging stimuli)