PS261 Lecture Notes - Lecture 9: Aphelocoma, Circadian Clock, Episodic Memory

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13 Aug 2016
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PS261- Lecture 9 Episodic-like memory (time and number)
The curious case of the amazing memory of the western scrub jay:
- Good at episodic memory episodic memory involves re-experiencing the original
event(memory time travel, re presenting that specific event)
- Allow them to retrieve the cache after 4-124 hours
- What, where, when, and how (for various events)
- Tend to remember cached sites for months.
- You can also cache memories for the future. (imagining future events/plan ahead)
-Spoon test: simple test for testing whether an animal is able to remember/recall a
specific event.
- Tool use- use of specific tool to help achieve a specific goal.
Mental Time travel:
-Being able to cast ourselves forward into the future.
- Prepare for upcoming events: spoon test
-Bischof-Kohler hypothesis: animals are trapped in their current motivational state.
-Stimulus specific satiety: Very often if you are eating something(Eating food of type 1 full);
this means you are only going to be full after eating that specific food this means that the
response is stimulus specific.
Breakfast experiment:
- Scrub jays placed in 3 part cage
-Morning:
- locked in room C no food
- Looking in room A food
- Outcome: they develop an understanding of which room leads to a reward
-Afternoon:
- Given food that they can cache
- Birds cache food in room C; not room A(since they know that there is no food present in
room C and so they will starve and in order to prevent hunger they hide food in room C)
- Forming an association between internal state between events(association with
hunger). (specific room and food), no episodic memory, no mental time travel
-Version 2:
-Morning:
- Locked in room C with peanuts
- Locked in room A with dog kibble
-Afternoon:
- Given both types of food to cache
- Birds cache peanuts in room A and kibble in room C
- Outcome: birds hide peanuts in the room containing dog food, vise versa for room A; so
that they have variety in the food they have to eat. (stimulus specific satiety)
- Neither rooms are associative with hunger because there is food present in both
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