Psychology Final Flash Cards
What is hindsight bias?
when you say oh yea i knew that was going to happen, after it happens
What is the Gambler’s Fallacy
finding patterns when they don’t really exist
What are the three goals of psychology?
- Measurement and Description
- Understanding and Prediction
- Application and Control
What is a theory?
A broad explanation or prediction concerning phenomena of interest; an integrated set of principles
What is a hypothesis?
A prediction stated in a way that allows it to be tested; more specific than a theory
Explain the Scientific Method
Specific hypotheses are derived from broad theories and then tested to form more defined theories, not all theories are testable (Freud) - you can never completely prove a theory - operational definitions make abstract concepts measurable and observable (instead of saying I’m hungry, say I haven’t eaten for 6 hours)
List four types of operational definitions
- self reports (questionnaires)
- response performance (reaction time, tests)
- physiological measures
- unobtrusive behavioral measures (how close someone sits, eye contact, smiling)
Descriptive Study - Case Study
An intensive study of one or a few individuals. Interviews, test, observations and more can all be part of the case study.
Observational Study - Surveys
Representative sample of population: individuals in a sample should math the type of people in population you wist to generalize to. Phrasing of questions is important. Random Sample.
Correlational Studies
Way of determining the degree of association between two variables. Correlation coefficient tells you about the relationship, the strength and direction.
What is something very important to remember about correlation studies?
Correlation does not imply causation
Describe an experiment
When a relationship between two or more variables is investigated by deliberately producing a change in one variable in a situation and observing the effects of a situation. The investigator changes some factors, keeping others constant and measures the effects on randomly assigned subjects.
Define dependent variable
The variable is dependent on the influence of the experiment. The variable being measured in an experiment.
Define independent variable
Variable that researcher manipulates in an experiment, can cause change in the dependent variable. There can be multiple levels (at least two) - levels are the same as groups or conditions
What is the control variable or group in an experiment?
They are not exposed to experimental treatment but their results are still measured
Define random assignment
each participant has equal chance of being in each level of independent variable
Define Interaction
qualifying a statement about a variable by taking another variable into account: the combination of variables has an effect
What is a confounding variable?
a variable that is not held constant across all levels (groups) of the independent variable (a confounding variable destroys internal validity)
Internal and External Validity
High internal validity - when the change in the dependent variable is the result of the independent variable only; a well designed experiment
High External Validity - when your results generalize broody to other situations or people
Experimenter effects or experimenter bias
when the experimenter unintentionally biases or influences the experiment, destroying internal validity
List the two different experimenter effects
single blind: participants don’t know the hypothesis
double blind: in addition, experimenters don’t know what condition participants are in
Descriptive Statistics
when you describe a group via central tendency and variability
Inferential Statistics
how likely results occurred by chance
Define sensation
the conversion of the stimulus to neural impulses
Define perception
interpreting the stimuli and making sense of them
Absolute Threshold
minimum stimulation necessary to detect light, sound, taste, touch and odor, half the time you will detect it and half the time you won’t
What is the three step process for experiencing a stimulus?
- Stimulus energy reaches sense receptors
- Sense organ traduces the stimulus energy into an electrical code (neural transmission)
- This cod is sent to the cerebral cortex, resulting in a psychological experience
(perceptions are created by our brains and are not always accurate)
Define constancy
we experience perceptual stability even though the sensed stimulus changes - shape constancy and size constancy
The Autokinetic Effect
stationary objects can appear to move
What is transduction?
The translation of stimulus energy into an electrical code/neural impulse
Difference Threshold
the minimum difference for a person to be able to detect the difference half the time (in color, pitch, weight, temperature, etc)
Weber’s Law
for two stimuli to be perceived as different, they must differ by a constant minimum percentage and not a constant amount
Where is the color vision located?
around the fovea
What was Watson?
A behaviorist
What is learning?
the relatively permanent change in performance potential brought about by experience - learning is best understood by looking at environmental factors rather than internal factors
What is the key to learning?
Associations; both types of conditioning focus on basic associations
Classical Conditioning
Ivan Pavlov and his dogs experiment
A neutral object comes to elicit a response through association with other stimulus, the first stimulus automatically elicits the desired response.
In classical conditioning and also in Pavlov’s experiment, what occurs naturally?
UCS: unconditioned stimulus - food
UCR: unconditioned response - salivate
In classical conditioning and also in Pavlov’s experiment, what occurs with training?
CS: conditioned stimulus - bell
CR: conditioned response - salivation
The bell at first was a neutral stimulus, it has to be a neutral stimulus before it becomes a conditioned stimulus
What is stimulus generalization?
response generalizes to similar stimuli
What is stimulus discrimination?
response to a specific stimulus but no other response to other stimuli ( can differentiate between stimuli)
Spontaneous Recovery
pair the CS with the UCS again and response will return more quickly this time after extinction
Single trial learning
when learning takes place with only one pairing of a CS with a UCS
Operant Conditioning
consequences of behavior from environment will affect the likelihood of that response in the future - different from classical conditioning because it involves voluntary behaviors - Skinner
Types of Reinforcement
Positive: increases behavior by administering a stimulus ex: compliments on a shirt
Negative: increases behavior by removing a stimulus
Types of Punishment
Positive: decreases behavior by administering a stimulus Ex: spanking
Negative: decreases behavior by removing a stimulus ex: taking away a toy or cell phone, time out
What does positive reinforcement do?
increases the chance a behavior will occur
What does negative reinforcement do?
removes a negative stimulus, also strengthens the response unlike punishment
Premack Principle
more frequent behavior can reinforce less frequent behavior - contiguity: time delay reduces learning
Punishment
Decreases the chance a behavior will occur - to be effect you have to deliver punishment swiftly, strongly and surely
Shaping
reinforcing successive approximations of the desired response, this is necessary when the behavior does not spontaneously occur initially
Two types of learning schedules
Continuous Schedules - each instance of the behavior is reinforced
Intermittent Schedule - some instances of behavior are reinforced
Two types of Intermittent Schedules
Fixed Ratio - reinforcement after fixed number of responses
Variable ratio - reinforcement (unknown) number
Two types of Interval Schedules
Fixed Interval - reinforcement after a fixed amount of time ; lowest rate of responding of the four schedules
Variable Interval - reinforcement after variable (unknown) amount of time
Observational learning
learning witnessing other’s behavior, no direct reinforcement, vicarious reinforcement: seeing others being reinforced or punished influences one’s behaviors
Latent learning
a new behavior is learned but not demonstrated until reinforcement is provided for displaying it
Memory
the process by which we encode, store, and retrieve information
List the three themes of memory
- Multiple memory systems exist
- Memory is active and constructed, rather than passive
- Memory accuracy can be affected by many different factors
Encoding of Memory
refers to the process by which information is initially recorded in a form usable to memory
Storage of Memory
the maintenance of material saved in the memory system
Retrieval of Memory
material in memory storage is located, brought into awareness, and used
Sensory Memory
the initial, momentary storage of information, lasting only an instant
Iconic Memory
reflects information from our visual system
Echoic Memory
stores auditory information coming from the ears
Episodic memory
memory for one’s personal experience
Semantic memory
memory for knowledge about the world
Procedural memory
doing things
Implicit Memory
without intention or awareness of memorization
Short term memory
holds information in awareness for a short period of time, generally 20-30 seconds
Chunking
a way of remembering things by grouping information together
Long term memory
Encoding - elaboration, structure, distribute learning over time
visual 13% acoustic 60% semantic 91%
Retrieval - cues, targeted pratice, state-depedent learning, state-dependent memory: experiencing the same internal state during encoding and retrieval also can enhance the memory
Forgetting - Interference
Proactive: old memories interfere with new learning
Retroactive: new memories interfere wit old ones
Serial Position Effects
Primacy: remembering first items better
Recency: remembering last items better
Parts of the brain used for declarative memory
- hippocampus
- cerebral cortex
- most likely in the frontal lobe
Parts of the brain used for procedural memory
- cerebellum
- one explanation for infantile amnesia
- amygdala - emotional memories
What are the two main parts of the nervous system?
The peripheral and central
What is the central nervous system made up of?
The brain and the spinal cord
The peripheral nervous system is made up of the
autonomic and somatic parts and the sympathetic and parasympathetic is part of the autonomic
What is the pituitary gland?
is the master gland, resistance to stress and disease, body growth
What does the adrenal gland do?
the adrenal gland secretes hormones in response to stress
What does the endocrine system do?
Sends messages throughout the nervous system
Hormones
affect the functioning or growth of other parts of the body
What are the four lobes of the cortex?
frontal lobe, parietal lobe, occipital lobe, temporal lobe
What does the occipital lobe do?
section of the brain located at the rear and bottom of each cerebral hemisphere containing the visual centers of the brain
What does the parietal lobe do?
Sections of the brain located at the top and back of each cerebral hemisphere containing the centers for touch, taste, and temperature sensations
What does the temporal lobe do?
areas of the cortex located just behind the temples containing the neurons responsible for the sense of hearing and meaningful speech
What does the frontal lobe do?
areas of the cortex located in the front and top of the brain, responsible for higher mental processes and decision making, motor responses, production of fluent speech
What is the motor area responsible for?
For voluntary movements of particular parts of the body
What is Broca’s are responsible for and what is Wernicke’s area responsible for in the frontal lobe?
Broca’s - speaking language
Wernicke’s - understanding language
What divides the frontal lobe and parietal lobe?
Central sulcas
Contralateral transmission
information generally crosses from one side of the body to the opposite side of the brain
Corpus Callosum
provides a pathway for communication between the hemispheres
What is the left hemisphere specialization?
language, logical thought, math; does the speaking - processes sequentially
What is the right hemisphere specialization?
spatial, visual, emotional expression; can’t speak - processes globally or holistically
What does the limbic system consist of?
- cerebellum
- hypothalamus
- amygdala
- hippocampus
What does the cerebellum do?
controls bodily balance
What does the hypothalamus do?
controls homeostasis and basic biological behavior/drives (eating, drinking, pleasure)
What does the amygdala do?
aggression/fear
What does the hippocampus do?
processing conscious memory
What are the four parts of the brainstem?
- thalamus
- medulla
- pons
- reticular formation
What does the thalamus do?
relay station for information concerning senses
What does the medulla do?
regulates heartbeat/breathing
What does the pons do?
movement
What does reticular formation do?
controlling arousal
What does a dendrite do?
receiving information, bringing in info to the neuron
What does an axon do?
passes information down the cell