PSYC 3F40 Lecture Notes - Applied Behavior Analysis, Homeostasis, Operant Conditioning
4 Feb 2013
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Orienting response organism directs appropriate sensory organ toward source of novel stimulus. Habituation simplest form of learning: learning not to respond to an unimportant event that occurs repeatedly. George humphrey experiment with snails, got used to tapping so wouldnt retreat into shell from evolutionary perspective waste of time and energy. Wicks and rankin used worm nemoda and subjected them to taps or heat. Found that this withdrawing effect occurs through neurons that respond to mechanical stimulus, regardless of stimulus. Could produce habituation to tap-elicited stimulus but not to heat shows they learned something about tap and could distinguish it from reaction to source of heat. Only had 302 neurons in ns short term habituation simplest form long term habituation animals with more complex nervous system. Pattern of experience plays a role in distinguishing long-term and short-term: When sitmuli are massed into quick repetitions, habituation is rapid but st.
