animal learning: associative or cognitive?. environmentbehavior environment behavior the mind mental...
TRANSCRIPT
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Animal Learning:
Associative or Cognitive?
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Environment Behavior
Environment Behavior
The Mind
mental representations
Learning/Behavioral Psychology
Cognitive Psychology
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Arguments against cognitive approach
• Philosophical:– Positing internal processes doesn’t add information
– Infinite # of cognitive models for any one phenomenon
– Purpose is to predict and control; what good do cognitive models do?
• Empirical (testable):– All behavior can be explained in terms of stimulus-
response learning
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HUNTER ON “REPRESENTATIONS”
...If comparative psychology is to postulate a representative fact, ...it is necessary that the stimulus represented be absent at the moment of the response. If it is not absent, the reaction may be stated in sensory-motor terms (Hunter, 1913, p. 21).
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Representational Systems Require:
An orderly mapping between the Represented and Representing worlds
A mental representation is a system of symbols, conscious or unconscious, that are isomorphic to some aspect of the environment, used to make behavior-generating decisions that anticipate events and relations in that environment
C.R. Gallistel
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A Classic Hunter Experiment
I shall run around the circle 5 times in order to procure a morsel of food.
Food
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Another Attack on S-R Theory
Edward Tolman
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The Pole Maze
Brown & Terrinoni (1996)
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Pole Box: Analysis
Hmm…Where shall I go next?
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Pole Box Results
Following discovery of 3rd baited pole
Following discovery of 2nd baited pole
chance
actual
chance
actual
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Summary
• SR theories cannot account for all of animal learning
• Animals do have mental representations
So… what kinds of representations do they have?
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Types of Human Memory
Procedural Declarative
Working
Short-Term
Long-Term
Episodic
Semantic
“Habits”
Motor Skills
Classical Conditioning
Operant Conditioning
Requires practice, many trials
“1-trial” learning
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Working Memory in Rodents
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Radial-Arm Maze (Olton & Samuelson)
How to solve it:
Random choice
Odor Trail
Response Chaining
*Memory
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Control Procedures
Rotate and unblock
Forced Choice Phase Free-Choice Phase
1
2
3
4
5
67
8
4
5
6
7
8
12
3
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Do rats use prospective encoding or retrospective encoding?
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Let rat visit N arms
4
5
6
8
12
3 7
WAIT
4
5
6
8
12
3 7
Return rat to maze
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Results
# choices before break
1 2 3 4 5 6 7 8
Performance after break
lo
hi
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A key feature of working memory is rehearsal.
Do animals engage in rehearsal?
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Delayed-Matching-to-Sample
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Memory Rehearsal?
On probe trials give the recognition test here
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Do animals have long-term memory?
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Clark’s Nutcracker
Pine seeds stored in the ground for later consumption.~5000 caches of 5-10 seeds each.Spread over a wide area (up to 20 × 20 km).Store more than their actual needs (20–25k seeds per bird!)Remarkable long-term spatial memory:
Relocate caches of seeds up to nine months later.Cache sites often buried under up to a meter of snow.
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Do animals have episodic memory?
(Memory of events and their times and places)
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Western Scrub-Jay in the lab of Nicola Clayton
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Clayton’s episodic memory task
Worms taste better than peanuts, but worms go bad…
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Clayton’s Results
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Summary: What have non-human animals got?
Mental Representations
Procedural memory
Working Memory
Retrospective encoding
Prospective encoding
Long-term memory
Episodic memory
Semantic memory
?
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Tool Use
“This occurred on the fifth trial of an experiment in which the crows had to choose between a hooked and a straight wire and only after the hooked wire had been removed by the other subject (a male). The animals had prior experience with the apparatus, but their only previous experience with pliant material was 1 hour of free manipulation with flexible pipe-cleaners a year before this experiment, and they were not familiar with wire.”
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Numerosity
Basic paradigm: Touching stimuli in numerical order produces a reward.
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Numerosity (Brannon & Terrace, 1998)
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Test with novel stimuli
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Conclusions
• S-R accounts are not sufficient
• Animals can represent abstract properties of stimuli and the relations among stimuli
• The cognitive differences between humans and other species are unclear.