Quiz 2 Flashcards
What is ethnography?
Participant observation of a culture or distinct social group. By making extensive field notes, the researcher tries to capture the culture’s unique values and social processes
What are structured observations?
the investigator sets up a laboratory situation that evokes the behavior of interest so that every participant has an equal opportunity to display the response
What happens in event sampling?
the observer records all instances of a particular behavior during a specified time period
How do you counteract the effects of observer bias?
hire a trained investigator to carry out a blind observation
What is observer influence?
the effects of the observer on the behavior studied
What is time sampling?
In this procedure, the researcher records whether certain behaviors occur during a sample of short intervals
What do neurobiological methods in psychological research do?
measure the relationship between nervous system processes and behavior; help identify the perceptions, thoughts and emotions of infants and young children who cannot report them themselves
What is an electroencephalogram (EEG)?
electrodes embedded in a head cap record electrical activity in the brain’s outer layers—the cerebral cortex
What are event-related potentials (ERPs)?
Using the EEG, the frequency and amplitude of brain waves in response to particular stimuli (such as a picture, music, or speech) are recorded in multiple areas of the cerebral cortex. Enables identification of general regions of stimulus-induced activity
What is an fMRI?
a scanner magnetically detects increased blood flow and oxygen metabolism in precise areas of the brain as the individual processes particular stimuli
What is near-infrared spectroscopy (NIRS)?
infrared (invisible) light is beamed at the brain; its absorption by areas of the cerebral cortex varies with changes in blood flow and oxygen metabolism as the individual processes particular stimuli. The result is a computerized moving picture of active areas in the cerebral cortex
What brain scanning techniques are safe for all ages?
EEG and NIRS, not fMRI
What are the main reasons for conducting a case study?
it is well-suited to studying the development of certain types of individuals who are few in number but vary widely in characteristics; you can obtain a very complete picture of the individual’s psychological functioning and the experiences behind it
What is reliability?
the consistency, or repeatability, of measures of behavior
What is inter-rater reliability and what is it used for?
observers are asked to evaluate the same behaviors, and agreement between them; it is used in observational research
What is test-retest reliability and what is it used for?
comparing children’s responses to the same measures on separate occasions to confirm the date; it is used for self-report and neurobiological data
What is validity?
how well a research method accurately measures characteristics that the researcher set out to measure.
What is internal validity?
the degree to which conditions internal to the design of the study permit an accurate test of the researcher’s hypothesis or question
What is external validity?
the degree to which their findings generalize to settings and participants outside the original study
What happens in correlational design?
researchers gather information on individuals, generally in natural life circumstances, and make no effort to alter their experiences. Then they look at relationships between participants’ characteristics and their behavior or development
What threatens internal validity?
confounding variables
Can a measure be reliable but not valid?
yes
Can a measure be valid but not reliable?
no
What is a correlation coefficient?
a number that describes how two measures, or variables, are associated with each other
How do researchers reduce the effect of confounding variables in an experiment?
random assignment and matching
What is matching?
participants are measured ahead of time on the factor in ques- tion—in our example, exposure to parental conflict. Then children high and low on that factor are assigned in equal numbers to each treatment condition