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67 Cards in this Set

  • Front
  • Back

Repeated exposure to the same stimulus can cause this.

Habituation.

This process is defined as the recovery of a response to a stimulus after habituation occured. This is often noted when a second stimulus interrupts the habituation process of the initial stimulus.

This is known as dishabituation.

The MCAT focuses on two types of learning. What are they?

Associative learning


Observational learning

What is associative learning?

Associative learning is the creation of a pairing, or association, either between two stimuli or between a bahavior and a response.

What is classical conditioning?

Classical conditioning is a type of association that takes advantage of biological, instinctual responses to create associations between two unrelated stimuli.

Any stimulus that brings about a reflexive response is known as what?

This is an unconditioned stimulus.

This is a response that is innate or is automatic. It is not paired with any other stimulus.

This is an Unconditioned response.

These stimuli do not produce any reaponse at all. What are these called?

Stimuli that do not cause a reflexive response are known as neutral stimuli.

Classical conditioning is also called this...

Acquisition

When a conditioned stimulus is presented to the organism too many times wothout the unconditioned stimulus, then this may occur.

This can cause exctinction. For example, a dog that hears a ringing bell but stops receiving food for it.

What is spontaneous recovery?

Spontaneous recovery occurs when an extant conditiones stimulus spontaneously results in a mild conditioned response.

This is a brodeaning effect, by which a stimulus similiar enough to the conditioned stimulus causes a conditioned response.

This is known as generalization

What is discrimination?

Discrimination occurs when an organism can distinguish between two similiar stimuli. This is the opposite of generalization.

This type of associative learning links voluntary behavior with consequences in order to alter the frequency of those behaviors.

This is known as operant conditioning!

Operant conditioning is associated with B.F. skinner. What is he considered the father of?

behaviorism.

What is reinforcement?

Reinforcement is the process of increasing the likelihood that an individual will perform a bahavior.

There are two categories or reinforcement;posotive and negative. Whats the difference between the two?

Positive reinforcement works by increasing the desored behavior by adding a positive consequence or posotive incentive. Negative reinforcement works by affording a desired outcome by removing something unpleasant.

Negative reinforcers can be subdivided into two different categories. What are they?

Escape learning


Avoidance learning

What is escape learning?

Escape learning occurs when an organisms behavior is to reduce the unpleasantness of something that already exists. Such as taking an aspirin to get rid of a headache.

What is avoidance learning?

Avoidance learning is meant to prevent the unpleasantness of something that has yet to happen. Such as studying for the mcat to avoid the unpleasant consequence of a poor test score! :)

Classical conditioning and operant conditioning go hand in hand. In terms of operant conditioning, what is the equivalent of an unconditioned stimulus in operant conditioning?

This is known as a primary reinforcer.

In contrast to reinforcement, punishment is used in order to reduce the occurence of a behavior. There is positive punishment as well as negative punishment. What is the difference between the two?

Positive punishment works by adding an unpleasant consequence in a reaponse to reduce that behavior. Negative punishment works by reduction of a behavior when a stimulus is removed.

What are the four factors that determine reinforcement schedules

Fixed


Variable


Ratio


Interval

Define a fixed ratio schedule

Fixed ratio schedules reinforce a behavior after a specific number of times that behavior is performed. Such as the reward of a food pellet to a rat every third time they press a lever.

Define a variable ratio schedule

A variable ratio reinforcement scheduled works to reinforce a behavior after a varying number of performances of that behavior.

What is a fixed interval schedule?

A fixed interval schedule works to reinforce an initial behavior withing the boundaries of a concrete scedule. Such as a mouse receiving a pellet every 60 minutes-regardlesa of how many times it presses the button or lever.

Describe a variable interval schedule.

A variable interval schedule worka by having a loosely set schedule that rewards a behavior. This is like a rat getting a pellet when it presses a lever after 60 second. Afterwards, the pellet will only be received after 90 seconds, etc...

Out of all the reinforcement schedules,which one works the fastest with the highest resistance to extinction?

This would be variable ratio scheduling.

What is latent learning?

Latent learning is the learning that occurs withoit a reward but is spontaneously demonstrated once a reward is introduced.

This is the biological predisposition that is observed in different organsisms when it comes to their ability to be conditioned to perform a certain behavior.

This is preparedness

What is instinctual drift?

Instinctual drift is known as the difficulty training an animal to overcome instinctual behaviors.

What a mirror neurons? What do they do? Where are they?

Mirror neurons are found in the frontal and parietal lobes of yhe cerebral cortex. These neurons seem to be vital to observational learning as they fire when we observe an individual performing an action amd when another imitates that action.

The formation of memories can be divided into three major processes. What are they?

Encoding


Storage


Retreival

This refers to the process of putting new information into memory.

Encoding

This is information gained without effort

Automatic processing

Active memorization of subjects and ideas.

Active (effortful) processing.


What are 3, main, different types of encoding?

Viual encoding


Acoustic encoding


Semantic encoding

Out of visual, acoustic, and semantic encoding, which is the strongest? The weakest?

The strongest is semantic encoding, the weakest is visual encoding.

What is the self reference effect?

The self reference effect is the phenomenon that we see when we can succesfully recall information and facts when it is in context of our own lives.

This is the repetition of a peice of information to keep it within memory.

Maintenance rehearsal

This method involves associating each item on a list with a location on a route you are already familiar with.

This is the method of loci

What is the peg word system?

The peg word system associates numbers with items that ryme with or resemble the numbers. Such as one-sun, two-shoe....

This is a memory trick that involves taking individual elements of a large list and grouping them into words with related meanings.

Chunking (clustering)

What is the most fleeting kind of memory?

This is sensory memory. This consists of both iconic and echoic memory.

How long does ahort term usually last (without rehearsal)?

Short term memory usually lasts about 30 seconds without rehearsal.

Explain working memory.

Working memory enables us to keep a few peices of information in our subconscious simultaneously and to manipulate that information. This involves the integration of short term memory, attention, and executive function.

This rehearsal is usually what allows us to devote information to long term storage. This work by associating new information to already known information in long term storage. This is closely tied to the self reference effect.

Elaborative rehearsal

There are two types of long term memory. What are they? Explain them.

Implicit memory (nondeclarative or procedural memory) consists of our skills and conditioned responses. Explicit (declarative) memory consists of memories that require conscious recall.

Explicit (declarative memory) can then be split into two seperate types of memories. What are they?

The two different types of declarative memory include episodic memory and semantic memory. Episodic memory is the recollection of events and experiences, while semantic memory is the recollection of facts and concepts.

This is the ability to succesfully retrieve memories from long term storage. This shows that learning has been accomplished.

This is retreival, or otherwise known as recall.

What is recognition? How is it different from recall?

Recognition is merely identifying a peice of information that was previously learned. Recognition is much more easily acheived than recall.

This is the phenomenon witnessed when someone learned material over a span of time, which affords more accurate and precise memory recall.

This is known as the spacing effect. This was disocered by ebbinghaus.

Explain what a semantic network is

A semantic network is a network that is connected by similiar ideas, and filed accordingly.

This retreival cue states that concepts and ideas learned in a specif environment or place will be recalled more efficiently in like environments.

This is known as the context effect

This retreival cue is dependant on the mental and physical state of the individual.

State dependant memory

This degenerative brain disorder is thought to be linked to the loss of acetylcholine in neurons that are linked to the hippocampus.

Alzheimers disease

What is dementia?

Simply put, dementia is the loss of cognitive function.

Microscopic findings of alzheimers patients have found thse abnormal structures.

Beta-amyloid plaques


Neurofibrillary tangles

What is karsakoffs syndrome?

Karsakoffs syndrome is a form of memory loss caused by thiamine deficiency in the brain. This disorfer is marked by both retrograde amnesia as well as anterograde amnesia.

This is a very common symptom of karsakoffs disease. Explain what it is.

Confabulation is a very common symptom of karsakoffs disease. This is where the diseased created vivid, fabricated memories in order to fill in the void memories.

This is the inability to recognize sounds, objects, or people. What can cause it?

Agnosia. It is often caused by physical damage to the brain, such as a stroke or neurological disorder multiple sclerosis.

Another common reason for memory loss is known as interference. What are the two types of intererence and how do they work?

Proactive interference occurs when old memories prove to interfere with the formation of new memories. For example, reciting your new address when you just moved. Retroactive interference occurs when the learning of nrlew information causes the loss of retrieval for old information.

This is the type of memory thay deals with remembering to perform a task at some point in the future.

Prospective memory.

This effect spans over the idea that memories can be altered and changed fue to influence and emotion.

The misinformation effect

What is source amnesia?

Source amnesia is a memory constructive error where memories from episodic memory and semantic memory are swapped, or incorrectly recalled. This means thay the person is confusing the context in which the information was obtained.

What is beleived to be the neurophysiological basis of long term memory?

This occurs when a certain stimulus is repeated, and the stimulated neurons become more eficient at releasing neurotransmitters. The is called long-term potentiation

True or false: State dependent recall is associated with internal states rather than external states.

True! For example, state dependant memory is seen in individuals who are intoxicated. This should not be confused with the context effect (in what setting an individual was when they acquired the information).