Animal learning and cognition Flashcards
Darwin
Provided a mechanism of evolutionary continuity between animals and human
Romanes
Pioneered the study of comparative psych, but relied on anecdotes to find egs of intelligence in animals. Intelligence = linear evolution
Lloyd Morgan’s canon 1894
Dismissed Romanes - argued against anthropomorphism.
In no case may we interpret an cation as the outcome of the exercise of a higher physical faculty, if it can be interpreted as the outcome of one which stands lower in psyc state.
Thorndike and his law of effect
First to use experimentation to study animal intelligence - trial by trial learning curves vs learning
Studied trial and error learning in cats using puzzle boxes
If a response leads to a satisfying outcome, it will be strengthened
Watson and little Albert
Emphasised the importance of learning in animal and human behaviour. Advocated behaviourism - studying only observable phenomena. Experiments with little Albert - induced fear when presented with rats due to low voice - fear transferred into rabbit
Skinner and Operant or Instrumental learning
Developed techniques - response shaping, schedules of reinforcement
Developed technology - conditioning chambers
Operant or instrumental learning = studying learning in animals that have to make a response to gain a reward
Pavlov and Pavlovian or Classical conditioning
Studied learning in which a neutral stimulus was paired with a reward.
Also known are type I or respondent conditioning.
Conditioned stimulus
e.g. tone
Unconditioned stimulus
e.g. food
Unconditioned response
e.g. eating
Conditioned response
e.g. salvination
Acquisition
CS and UCS pairing
Extinction
CS aline
Spontaneous recovery
CS alone after 24 hour rest
Generalisation of a stimulus
Gradient and decrement
e.g. lion - all big cats give same response
Banks and Flora 1977 artificial ranks based on
Appearance, Aristotle’s great chain of being, evolution, brain size
Cephalisation index
Ratio of body to brain weight
Anaxagoras and MacPhil
All animals have the same intelligence but different levels of ‘nouse’ bring out intelligence, except language in humans
Learning
A relatively permanent change in behaviour that results from experience
Ranking by speed of learning problems and Shard and Angermeier, Bitterman 1975
Unexpected inter-species difference e.g. rat/human mazes
Difficult to equate perceptual demands of the test
Difficult to equate motivational demands of test e.g. vary rewards and motivation to equal value to an animal
Intra-species differences in speed of learning
Biological relevance - Garcia and Koelling 1966 - Garcia effect
Some stimuli more readily associated than others, depending on CS
Animal memory
When current behaviour is under the influence of past experience
Capacity - Vander Wall 1982
Food storing birds: Clark’s nutcracker stores pinenuts in autumn for winter - can recover 90%, even in snow
Capacity - Vaughan and Greene 1984
Photographs with pigeons - peck at particular slides to get food. All very similar and can remember 160. Everyday scenes, different angles, remember which ones associated with food.
Timing - periodic and internal (Church and Deluty/Gibbon)
Periodic timing - circadian clock - active in day, not night, even when constant light/heat
Interval timing - hear a tone for 4 or 16 s - different levers to press; switch light out at average 4 s - only at 4s reward for pressing lever
Number: Meck and Church 1983, rats
Can distinguish 4 tones (left lever) and 16 tones (right lever) even when same length of time
Number: Brannon and Terrace 2000, monkeys
Gave novel shaped and sized stimuli and press in order of number of dots etc.
Number: Regani, Regotin and Vallortigara 2007, 5-day old chicks
Trained to get food in different wells along a row of food wells, even when trays rotated or begin from new location
Categories: Herrnstein, Loveland and Cable 1976
Pigeons 160 slides with/out trees - reward if pecked at tree
Categories: explanation
Innate categories (certain info) Exemplar learning (learn every example) Feature learning (common component) => exemplar and generalisation
Habituation
A reduction in responsiveness to a stimulus as a result of its repeated presentation
STM: Whitlow 1975
Plethysmograph (change in blood flow)
Tone I, 60s, tone I -> less surprised 2nd time, memory?