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Lecture 2

Week 2 & 4 ps261.docx

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Anneke Olthof

Chapter 2: Elicited Behaviour 1/16/2013 4:58:00 PM The nature of Elicited Behaviour The Reflex  A specific relation between a stimulus and a corresponding response that is a consequence of the organization of the nervous system Sensory neuron: Motor neuron: carry signals away Afferent: arrival Efferent: exiting Supernormal stimulus: ex. Wearing red lipstick, plastic sugery Not necessarily found in nature Consummatory behaviour: taking a nut, putting it in your mouth Building a nest: appetitive Fertilizing: consummatory Beating his tail to show off: appetitive Swimming in a zig-zag pattern: appetitive Effects of repeated stimulation - decar was wrong, you don’t always see the same response habituation is stimulus specific. When you experiment with a lemon the first th 10 times, you become immune to it. The 11 time there was a booming response to the lime, the sudden change Effects of repeated stimulation - the new face shown to the Caucasian infants was 70% made up of the old face and 30% made up of an alternate race - Caucasian notice more differences in own race, Asians notice differences in peoples faces of their own race sensory adaptation: ex. When someone takes a picture of you with flash and you cant see anything rules out fatigue: lemon lime salivation experiment. The response was specific to the lemon because results picked up when lime was used true/false: 1) habituation helps you to attend to stimuli around you that may be important: false but can be true??? 2) studies of sensitization need to rule out fatigue as a possible explanation for the change in behaviour to a stimulus over time: false 3) a decrease in responsiveness over time could happen because of sensor adaptation: 4) a control for sensory adaptation is showing that habituation is stimulus specific: true The dual-process theory T/F 1) the habituation process is the pbservable…: false 2) the sum of the habituation and sensitization proce
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