Week 3- Preparation Activity- Rescorla-Wagner questions PDF

Preview

Summary

Practice questions...

Description

Rescorla Wagner Model Questions. In the following examples the letters refer to the following: T = tone L = light US = unconditioned stimulus The subscript letters following each letter refer to the intensity of the CS or US L = Low, M = Medium and H = high

Rescorla-Wagner model Please refer to the following design to answer the questions below: Group 1 2

Training Phase 1 TM- USM

Training Phase 2 LMTM-USM LMTM-USM

Testing LM LM

1. What phenomenon in classical conditioning is outlined in group 1? Compound conditioning - blocking

2. During test, how will responding to the light for Group 1 compare to Group 2? Group one there will be little or no learning, group 2 will be learning

3. How would the Rescorla-Wagner (1972) model account for these results? The associative strength would be weak for the light stimulus, therefore change in v would be lower than for the tone. Max associative strength has to split between in group 2, equal strength in group 2 Less learning allowed for light in group 1 The subject had prior learning with the tone in group 1, the light has less associative strength to the US. Whereas if they (light and tone) were introduced at the same time, they’d have equal associative strength.

4. According to the Rescorla-Wagner (1972) model, how much learning will accrue to the light and tone across Phase 2 training for group 1?

Light- 0 Tone-100

5. How could you increase the amount of learning about the light and the tone in Phase 2 training for group 1? Light should be presented with more intensity than the tone. – wouldn’t work much because there is little prediction error. Increase salience of US, therefore increase lambda – called unblocking

In the following hypothetical experiments, please indicate whether associative strength of the light will increase, decrease or stay the same from Phase 1 to Phase 2: Experiment 1 2 3 4 5 6

1.

Phase 1 LM- No US LM-USM TM-USM TM-USM TM-USM TM-USM, LM-USM

increase

acquisition

2.

decrease

extinction

3.

stay the same- very, very low learning if there is

blocking

4.

increase- increasing salience of US increases lambda

Unblocking – sort of acquisition

Phase 2 LM-USM LM-No US TMLM-USM TMLM-USH TMLM-No US TMLM-USM

5. decrease- light predicts that US won’t occur, light starts at zero and acquires negative strength Conditioned inhibition

6. decreaseoverexpectation...