Create an account
repetition of the methods used in a previous experiment to see whether the same methods will yield the same results
the outcome factor; the variable that may change in response to manipulations of the independent variable
choosing of members of a population so that every individual has an equal chance of being chosen
a research method in which an investigator manipulates one or more factors to observe the effect on some behavior or mental process; establish cause and effect relationship
a research method that looks like an experiment BUT subjects are not randomly assigned to control and experimental groups; no cause and effect can be drawn
observing and recording behavior in naturally occurring situations without trying to manipulate and control the situation
surveys and tests
obtain large samples of abilities, beliefs, or behaviors at a specific time and place
an observation technique in which one person is studied in depth in the hope of revealing universal principles
division of the sample into groups so that every individual has an equal chance of being put in any group or condition
a factor other than the independent variable that might produce an effect in an experiment.
a description of the specific procedure used to determine the presence of a variable
a phenomenon that occurs when a researcher's expectations or preferences about the outcome of a study influence the results obtained
clues participants discover about the purpose of a study that suggest how they should respond
single blind procedure
research design in which participants don't know whether they are in the experimental or control group
double blind procedure
research design in which neither the experimenter nor the participants know who is in the experimental group and who is in the control group
a physical or psychological treatment that contains no active ingredient but produces an effect because the person receiving it believes it will
response to the belief that the IV will have an effect, rather than the IV's actual effect, which can be a confounding variable
an orderly arrangement of scores indicating the frequency of each score or group of scores
average or most typical scores of a set or research data or distribution; mean, mode, and median
the spread or dispersion of a set of research data or distribution; range, variance, standard deviation
a measure of variability that indicates the average difference between the scores and their mean.
bell-shaped curve that represents data about how lots of human characteristics are dispersed in the population
the condition that exists when the probability that the observed findings are due to chance is very low.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together