Final Exam Flashcards
Empirical method
a set of rules and techniques for observation
Scientific method
a procedure for finding truth by using empirical evidence.
Theory
a hypothetical explanation of a natural phenomenon
Hypothesis
a falsifiable prediction made by a theory.
Instrument
anything that can detect the condition to which an operational definition refers
Power
an instrument’s ability to detect differences or changes in the property.
Demand Characteristics
those aspects of an observational setting that cause people to behave as they think someone else wants or expects
Naturalistic observation
a technique for gathering scientific information by unobtrusively observing people in their natural environments
Observer bias
expectations can influence observations and expectations can influence reality. Observers’ expectations, then, can have a powerful influence on both the observations they make and on the behavior of those whom they observe.
Double-blind observation
an observation whose true purpose is hidden from both the observer and the person being observed
Self-selection
a problem that occurs when anything about a person determines whether he or she will be included in the experimental or control group.
Population
complete collection of people, such as the population of human beings (about 7 billion), the population of Californians (about 38 million), or the population of people with Down syndrome (about 1 million).
Sample
a partial collection of people drawn from a population
Random sampling
a technique for choosing participants that ensures that every member of a population has an equal chance of being included in the sample
Natural correlation
the correlations observed in the world around us
Third-variable correlation
two variables are correlated only because each is causally related to a third variable
Correlation versus Causation
Correlation does not necessarily mean causation
Experiment
a technique for establishing the causal relationship between variables
Manipulation
involves changing a variable in order to determine its causal power
Variable
properties whose values can vary across individuals or over time
Dependent
variable that is measured
Independent
what the experimenter will change
Experimental group
the group of people who experience a stimulus
Control group
the group of people who do not experience that stimulus
Informed consent
a written agreement to participate in a study made by an adult who has been informed of all the risks that participation may entail
Debriefing
a verbal description of the true nature and purpose of a study
Validity
the goodness with which a concrete event defines a property
Internal validity
an attribute of an experiment that allows it to establish causal relationships
External validity
an attribute of an experiment in which variables have been defined in a normal, typical, or realistic way
Reliability
the tendency for an instrument to produce the same measurement whenever it is used to measure the same thing
Sensory memory
a type of storage that holds sensory information for a few seconds or less
Iconic memory
a fast-decaying store of visual information
Echoic memory
a fast-decaying store of auditory information
Short-term memory
holds nonsensory information for more than a few seconds but less than a minute
Long-term memory
a type of storage that holds information for hours, days, weeks, or years
Working memory
active maintenance of information in short-term storage
Procedural memory
the gradual acquisition of skills as a result of practice, or “knowing how” to do things
Prospective memory
remembering to do things in the future
Source memory
recall of when, where, and how information was acquired
Flashbulb memories
detailed recollections of when and where we heard about shocking events
Semantic encoding
the process of relating new information in a meaningful way to knowledge that is already stored in memory
Visual imagery encoding
the process of storing new information by converting it into mental pictures
Storage
is the process of maintaining information in memory over time
Rehearsal
the process of keeping information in short-term memory by mentally repeating it
Retrieval
bringing memories to mind
Consolidation
the process by which memories become stable in the brain
Reconsolidation
The process that causes memories to become vulnerable to disruption when they are recalled, thus requiring them to become consolidated again
Long-term potentiation (LTP)
a process whereby communication across the synapse between neurons strengthens the connection, making further communication easier
State-dependent retrieval
the tendency for information to be better recalled when the person is in the same state during encoding and retrieval
Transfer-appropriate processing
the idea that memory is likely to transfer from one situation to another when the encoding and retrieval contexts of the situations match
Priming
an enhanced ability to think of a stimulus, such as a word or object, as a result of a recent exposure to the stimulus
Semantic memory
a network of associated facts and concepts that make up our general knowledge of the world
Episodic memory
the collection of past personal experiences that occurred at a particular time and place
Explicit memory
when people consciously or intentionally retrieve past experiences
Implicit memory
past experiences influence later behavior and performance, even without an effort to remember those experiences or an awareness of the recollection
Chunking
involves combining small pieces of information into larger clusters or chunks that are more easily held in short-term memory
Semantic encoding
the process of relating new information in a meaningful way to knowledge that is already stored in memory
Visual imagery
the process of storing new information by converting it into mental pictures
Organizational
the process of categorizing information according to the relationships among a series of items
Retroactive interference
situations in which later learning impairs memory for information acquired earlier
Proactive interference
situations in which earlier learning impairs memory for information acquired later
Retrograde amnesia
the inability to retrieve information that was acquired before a particular date, usually the date of an injury or surgery.
Absentmindedness
a lapse in attention that results in memory failure
Blocking
a failure to retrieve information that is available in memory even though you are trying to produce it
Memory misattribution
assigning a recollection or an idea to the wrong source
Bias
the distorting influences of present knowledge, beliefs, and feelings on recollection of previous experiences
Persistence
the intrusive recollection of events that we wish we could forget
Suggestibility
tendency to incorporate misleading information from external sources into personal recollections
Learning
the acquisition of new knowledge, skills, or responses from experience that results in a relatively permanent change in the state of the learner
Shaping
learning that results from the reinforcement of successive steps to a final desired behavior
Extinction
the gradual elimination of a learned response that occurs when the CS is repeatedly presented without the US
Generalization
The CR is observed even though the CS is slightly different from the CS used during acquisition
Discrimination (Learning)
the capacity to distinguish between similar but distinct stimuli
Habituation
a general process in which repeated or prolonged exposure to a stimulus results in a gradual reduction in responding
Sensitization
A simple form of learning that occurs when presentation of a stimulus leads to an increased response to a later stimulus
Acquisition
the phase of classical conditioning when the CS and the US are presented together
Spontaneous recovery
the tendency of a learned behavior to recover from extinction after a rest period
Biological preparedness
a propensity for learning particular kinds of associations over others
Law of effect
Behaviors that are followed by a “satisfying state of affairs” tend to be repeated and those that produce an “unpleasant state of affairs” are less likely to be repeated
Cognitive map
a mental representation of the physical features of the environment
Classical conditioning
when a neutral stimulus produces a response after being paired with a stimulus that naturally produces a response
Operant conditioning
a type of learning in which the consequences of an organism’s behavior determine whether it will be repeated in the future
Unconditioned stimulus (US
something that reliably produces a naturally occurring reaction in an organism
Unconditioned response (UR
a reflexive reaction that is reliably produced by an unconditioned stimulus
Conditioned stimulus (CS
a previously neutral stimulus that produces a reliable response in an organism after being paired with a US
Conditioned response (CR)
a reaction that resembles an unconditioned response but is produced by a conditioned stimulus
Second-order conditioning
conditioning in which a CS is paired with a stimulus that became associated with the US in an earlier procedure
Latent learning
something is learned, but it is not manifested as a behavioral change until sometime in the future
Observational learning
learning takes place by watching the actions of others
Implicit learning
learning that takes place largely independent of awareness of both the process and the products of information acquisition
Reinforcer
any stimulus or event that functions to increase the likelihood of the behavior that led to it
Positive reinforcement
where a rewarding stimulus is presented
Negative reinforcement
where an unpleasant stimulus is removed
Intermittent reinforcement
when only some of the responses made are followed by reinforcement
Primary reinforcers
Food, comfort, shelter, or warmth are examples of primary reinforcers because they help satisfy biological needs
Secondary reinforcers
derive their effectiveness from their associations with primary reinforcers through classical conditioning
Punisher
any stimulus or event that functions to decrease the likelihood of the behavior that led to it
Positive punishment
where an unpleasant stimulus is administered
Negative punishment
where a rewarding stimulus is removed
Fixed-interval schedule (FI
reinforcers are presented at fixed-time periods, provided that the appropriate response is made
Variable-interval schedule (VI
a behavior is reinforced based on an average time that has expired since the last reinforcement
Fixed-ration schedule (FR
reinforcement is delivered after a specific number of responses have been made
Variable-ratio schedule (VR
the delivery of reinforcement is based on a particular average number of responses
Cell body (or soma
the largest component of the neuron that coordinates the information-processing tasks and keeps the cell alive
Dendrite
receive information from other neurons and relay it to the cell body
Axon
carries information to other neurons, muscles, or glands
Synapse
the junction or region between the axon of one neuron and the dendrites or cell body of another
Terminal buttons
knob-like structures that branch out from an axon
Myelin sheath
an insulating layer of fatty material
Glial cells
support cells found in the nervous system
Sensory neurons
receive information from the external world and convey this information to the brain via the spinal cord
Motor neurons
carry signals from the spinal cord to the muscles to produce movement
Inter neurons
connect sensory neurons, motor neurons, or other interneurons
Resting potential
the difference in electric charge between the inside and outside of a neuron’s cell membrane
Action potential
an electric signal that is conducted along the length of a neuron’s axon to a synapse
Neurotransmitters
chemicals that transmit information across the synapse to a receiving neuron’s dendrites
Receptors
parts of the cell membrane that receive neurotransmitters and either initiate or prevent a new electric signal
Agonists
drugs that increase the action of a neurotransmitter
Antagonists
drugs that block the function of a neurotransmitter
Mirror neurons
active when an animal performs a behavior, such as reaching for or manipulating an object, and they are also activated when another animal observes the first animal as it performs the same behavior
Neurons
cells in the nervous system that communicate with one another to perform information-processing tasks
EEG
a device used to record electrical activity in the brain
PET
A harmless radioactive substance is injected into a person’s bloodstream. Then the brain is scanned by radiation detectors as the person performs perceptual or cognitive tasks, such as reading or speaking.
fMRI
detects the difference between oxygenated hemoglobin and deoxygenated hemoglobin when exposed to magnetic pulses
TMS
delivers a magnetic pulse that passes through the skull and deactivates neurons in the cerebral cortex for a short period, mimicking brain damage
CNS
composed of the brain and spinal cord
PNS
connects the central nervous system to the body’s organs and muscles
Somatic
a set of nerves that conveys information between voluntary muscles and the central nervous system
Autonomic
a set of nerves that carries involuntary and automatic commands that control blood vessels, body organs, and glands
Parasympathetic
helps the body return to a normal resting state
Sympathetic
a set of nerves that prepares the body for action in challenging or threatening situations
Frontal
which sits behind the forehead, has specialized areas for movement, abstract thinking, planning, memory, and judgment
Temporal
is responsible for hearing and language (above the ear)
Occipital
processes visual information (located at the back of the brain)
Parietal
carries out functions that include processing information about touch. (located in front, at the top, of the occipital lobe [on top of temporal lobe])
Thalamus
relays and filters information from the senses and transmits the information to the cerebral cortex
Hypothalamus
regulates body temperature, hunger, thirst, and sexual behavior
pituitary gland
the “master gland” of the body’s hormone-producing system, which releases hormones that direct the functions of many other glands in the body
hippocampus
critical for creating new memories and integrating them into a network of knowledge so that they can be stored indefinitely in other parts of the cerebral cortex
amygdala
located at the tip of each horn of the hippocampus, plays a central role in many emotional processes, particularly the formation of emotional memories
Spinal reflexes
simple pathways in the nervous system that rapidly generate muscle contractions
Hindbrain
an area of the brain that coordinates information coming into and out of the spinal cord
Medulla
an extension of the spinal cord into the skull that coordinates heart rate, circulation, and respiration