103_3_full - PSYC 103 Winter 2010 Lecture 3...

Info icon This preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
PSYC 103 Winter 2010 Lecture 3
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A conditional relationship emerges between the meaningful stimulus and the previously neutral stimulus. US - unconditional stimulus - biologically significant stimulus (food) UR - unconditional response (salivation) CS - conditional stimulus - previously neutral stimulus (bell) CR - conditional response (salivation) Classical (Pavlovian) conditioning Excitatory: CS signals the presence of a US Inhibitory : CS signals the absence of a US CS US UR CS CR Training Test
Image of page 2
3 Conditioning techniques Excitatory conditioning Eye-blink conditioning • Normally used in rabbits • A brief CS (e.g. tone) followed by a US (e.g. cheek shock) sufficient to produce a blink. • After a number of pairings the CS will evoke a blink when presented alone Moore (1972): Conditioned rabbits to a 1200 Hz tone and tested tones of different frequencies: generalization and generalization decrement extinction generalization
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4 Conditioning techniques Excitatory conditioning Autoshaping • Commonly used in pigeons • An acrylic panel is illuminated (CS), then food (US) is delivered into a hopper. • After a number of pairings the pigeon will come to peck the panel acrylic panel hopper
Image of page 4
Autoshaping movie
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
6 Conditioning techniques Excitatory conditioning Conditioned suppression Normally used in rats • After learning to press a lever for food, a CS (e.g. tone) is paired with a mild shock (US). • After several CS-US pairings, the CS will come to suppress lever pressing - Suppression ratio to measure learning: a/(a+b) Where: a= lever pressing during the CS b= lever pressing during the inter-trial interval CS Responses Stimulus
Image of page 6
Conditioned suppression movie
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Acquisition and extinction of conditioned suppression by rats to a 60-second conditioned stimulus (CS) that was paired with foot shock (adapted from Hall & Pearce, 1979). Conditioned suppression Tone + shock Tone without shock
Image of page 8
Mean suppression ratios for rats given excitatory conditioning with a tone intermixed among trials with a light-tone compound followed by nothing (adapted from Zimmer-Hart & Rescorla, 1974). Conditioning techniques Inhibitory conditioning CS signals the absence of US Light+tone no shock Tone shock Conditioned inhibitor
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
10 Conditioning techniques Inhibitory conditioning e.g. Pearce, Nicholas & Dickinson (1982) tone Shock light Shock Experimental
Image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern