Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
correlation |
a measure of the extent to which two variables change together, and thus of how well either variable predicts the other
|
|
|
correlation coefficient |
a statistical index of the relationship between two variables (from -1.0 to +1.0) |
|
|
scatter plot |
a graphed cluster of dots, each of which represents the values of two variables. The slope of the points suggests the direction of the relationship between the two variables. The amount of scatter suggests the strength of the correlation (little scatter indicates high correlation) |
|
|
illusory correlation |
the perception of a relationship where none exists |
|
|
experiment |
a research method in which an investigator manipulates one or more factors (independent variables) to observe the effect on some behavior or mental processes ( the dependent variable). By random assignment of participants, the experimenter aims to control other relevant variables |
|
|
experimental group |
in an experiment, the group exposed to the treatment, that is, to one version of the independent variable |
|
|
control group |
in an experiment, the group not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment |
|
|
random assignment |
assigning participants to experimental and control groups by chance, thus minimizing preexisting differences between the different groups |
|
|
double-blind procedure |
an experimental procedure in which both the research participants and the research staff are ignorant (blind) about whether the research participants have received the treatment or a placebo. Commonly used in drug-evaluation studies) |
|
|
placebo effect |
experimental results caused by expectations alone; any effect on behavior caused by administration of an inert substance of condition, which the recipient assumes is an active agent |
|
|
independent variable |
the experimental factor that is manipulated; the variable whose effect is being studied |
|
|
confounding variable |
a factor other than the independent variable that might produce an effect in an experiment |
|
|
dependent variable |
the outcome factor; the variable that may change in response the manipulations of the independent variable |
|
|
validity |
the extent to which a test of experiment measures or predicts what it is supposed to |
