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PSYCHOLOGY
Learning and memory
Question | Answer |
---|---|
Memory | A memory involves an active, information processing system in which information is detected, stored/organised and can be retrieved |
Sensory memory | • The entry point of memory. • The brief retention of the effects of sensory stimuli. • Not consciously aware of most of sensory information. • Information is received as raw (it has no meaning). |
Sensory memory function | Enables us to perceive our environment in an uninterrupted fashion via a brief retention of sensory information. Also acts as a filter for short term memory If attended to the information passes into short term memory. |
Sensory memory capacity and duration | • If not attended to it fades and is permanently lost. • Capacity: unlimited • Duration: 0.3-3/4 seconds |
Sensory memory: iconic memory | Visual sensory memory Duration: 0.3 seconds- allows smooth perception rather than blurred vison. Capacity: unlimited |
Sensory memory: echoic memory | Auditory sensory memory Duration: 3-4 seconds- allows us to attend to speech. Capacity: unlimited |
Short term memory | • Memory that is transferred from sensory memory or retrieved from long term memory and can be constantly manipulated. • The memory store where all conscious reasoning, thinking and planning take place (working memory). |
Short term memory duration and capacity | • Duration: 12-30 seconds= very susceptible to interruption or interference. • Capacity: 5-9 units of information • If information is not rehearsed it decays (duration) or is displaced (pushed out by new information due to capacity being reached). |
Chunking | the grouping of single units of information into groups of units = increase capacity |
Long term memory | • Relatively permanent memory store. • Information that is encoded can be stored and retrieved. • Memory is not stored in any one brain region subdivided into declarative and procedural |
Long term memory duration, capacity and storage | Duration: unlimited • Capacity: unlimited • Storage: information is encoded by its meaning and stored in semantic networks |
Declarative memory | Semantic: Impersonal, general, factual knowledge Example: knowing a phone number Episodic: memories of personally significant events and their content Example: recalling what happened on your birthday |
Procedural memory | Memory of learnt skills and action. Example: knowing how to ride a bike, walk or tie your shoelace |
Explicit and implicit memory | • Refers to the retrieval and expression of memory |
Explicit | conscious retrieval of memory, including recall and recognition. (awareness) Semantic and episodic |
Implicit | unconscious retrieval of memory, does not require deliberate recall. (no awareness) Procedural and classically conditioned |
Cerebral cortex | encoding, formation and storage of long term declarative memory (information is stored near the area it is initially processed) |
Prefrontal cortex | stores short term memory to enable coding |
Frontal lobes | procedural memories (language and motor skills) and episodic memories |
Temporal lobes | Memory for sounds and names of colours |
Parietal lobes | Spatial memory (memory of oneself). |
Occipital lobes | Memories for pictures, allow us to recognise faces and images |
Hippocampus part 1 | • The cells of the hippocampus are able to reproduce and enable new memories to form. • Responsible for converting short term memories into long term memories. • Responsible for the role of consolidation of explicit memories. |
Hippocampus part 2 | • Important for storage and retrieval of memory of complex tasks that require declarative memory. • Role in spatial memory- hippocampal cells encode spatial location information (direction). • Does not store memories |
Amygdala part 1 | • Essential for formation of implicit memories, including procedural memories and those formed during classical conditioning (fear response). |
Amygdala part 2 | • Essential for consolidation of emotional memory (such as emotions shown on faces). • During high emotional arousal the amygdala signals the hippocampus that stronger encoding is required |
Cerebellum | • Processes, encodes and stores procedural memories. • Also has a role in classical conditioning. • Involved in learning and executing motor skills |
Interaction between brain regions - Hippocampus and amygdala part 1 | • Due to being near amygdala, hippocampus plays a role in the relationship between memory & emotion • amygdala plays a role in consolidation of declarative memory with emotional content- decides what memory is to be encoded and where it will be stored |
Interaction between brain regions - Hippocampus and amygdala part 2 | • When we form emotional memories the hippocampus enables neural representations of the memory whilst the amygdala is responsible for the emotional content • The hippocampus component is explicit memory and the amygdala component is implicit |
Interaction between brain regions - Hippocampus and cerebral cortex part 1 | • A part of the storage and processing of declarative memory takes place in hippocampus before being transferred to the cerebral cortex for permanent storage. |
Interaction between brain regions - Hippocampus and cerebral cortex part 2 | • Provides cross-referencing system that links together all aspects of memory from different areas of the brain. |
Classical conditioning part 1 | • A type of learning that occurs through repeated association of two (or more) different stimuli. • Learning is said to have occurred when a specific stimulus consistently produces a response it did not previously |
Classical conditioning part 2 | • Only involuntary and innate reflexes can be classically conditioned. • Classical conditioning is a three phase process- before conditioning, during conditioning/acquisition and after conditioning. |
Unconditioned stimulus (UCS) | produces a naturally occurring response/ the unconditioned (innate) response (UCR). |
Neutral stimulus (NS) | does not produce a naturally occurring response |
Conditioned stimulus (CS) | after repeated association with the unconditioned stimulus produces a conditioned (learnt) response (CR). |
Before conditioning: | • An unconditioned stimulus (UCS) produces an unconditioned response (UCR). UCS = UCR • A neutral stimulus (NS) causes no naturally occurring response NS = no response |
During conditioning: | • The unconditioned stimulus (UCS) is repeatedly paired with the neutral stimulus (NS) to produce the unconditioned response (UCR). UCS + NS = UCR |
After conditioning: | • The neutral stimulus (NS) is now the conditioned stimulus (CS) and produces a conditioned response (CR). NS = CS. CS = CR |
Pavlov’s experiment | •Pavlov was the first person to discover the process of classical conditioning •His experiment involved connecting a collection tube to the dog’s salvia producing glands •He then recorded the amount of saliva secreted by each dog in response to stimuli |
Pavlov’s experiment conditions | food (UCS) ---- salivation (UCR) bell (NS) ---- no response bell + food ---- salivation (CR) bell (CS) ---- salivation (CR) |
timing of classical conditioning | • Classical conditioning occurs best when the unconditioned stimulus is presented immediately after the neutral stimulus |
Taste Aversion part 1 | • Much stronger than classical conditioning- usually only takes one occasion. • Unconditioned stimulus is chemicals which produce the unconditioned response of feeling ill/vomiting. Food is the neutral stimulus |
Taste Aversion part 2 | • Food is associated with chemicals that induce vomiting or gag reflux. • Food becomes conditioned stimulus that produces conditioned response of gagging/feeling sick. |
Little Albert - before conditioning | • The unconditioned stimulus was the loud noise which produced the unconditioned response of crying and emotional distress. • The neutral stimulus was the white rat. |
Little Albert - During conditioning | • The rat was repeatedly paired with the loud noise to produce crying and emotional distress |
Little Albert - After conditioning | • The rat was now the conditioned stimulus and produced the conditioned response of crying |
Ethics associated with the Little Albert Experiments - do not harm | Little Albert experienced psychological distress as a result of the experiment. |
Ethics associated with the Little Albert Experiments - consent | Little Albert was unable to give consent for his participation and his mother was not informed of the full extent of the experiment |
Ethics associated with the Little Albert Experiments - debreifing | He was not desensitised to the rat and harm was not corrected. |
Ethics associated with the Little Albert Experiments - withdrawal | Little Albert and his mother were not given the opportunity to withdraw and whenever Little Albert attempted to move away from the rat he was placed back with it. |
Ethics associated with the Little Albert Experiments - competence | the experiment lacked control, there was only one participant and there was only one trial. |
Stimulus generalisation | A stimulus similar but not identical to the conditioned stimulus produces the same or similar response as the conditioned stimulus. • For example: Little Albert was afraid of other animals such as rabbits and dogs. |
Stimulus discrimination | The conditioned stimulus is differentiated from other similar stimuli- the conditioned individual responds only to the conditioned stimulus. • For example: Little Albert only cries when he sees a rat, not a rabbit or dog. |
Extinction | The conditioned stimulus no longer produces a conditioned response. • For example: If Little Albert were to no longer cry when he saw a rat. |
Spontaneous recovery | The reappearance of the conditioned response when presented with the conditioned stimulus after the conditioned response was previously extinguished. Follows extinction and a rest period. The recovered response is not as strong |