Ap psychology
match the letters with the numbers
words listed
a. hypothesis
b. hindsight bias
c. scatterplot
d. replication
e. placebo
f. cross-sectional research
g. longitudinal research
h. independent variable
i. experiment
j. dependent variable

1. one type of study in which people of different ages are examined at the same time(s). this is usually done with cohorts, so that researchers can examine how people of different ages perform, behave, or respond to a particular function.
2. when subjects are studied and restudied over a period of time (as opposed to studied across different experimental conditions as is the case with a repeated measures study). this design is good for looking at the effects or changes over a long period of time, usually as people age.
3. any substance that is not known to have any pharmacological effects (produces no meaningful changes in an organism, either chemical, biological, etc.) that is made to look like an active ("real") drug.
4. a visual representation of the relationships or associations between two numerical variables, which are represented as points (or dots), each plotted at a horizontal axis (y-axis) and vertical axis (y-axis); used to determine the three most common kinds of relationships: positive or rising, negative or falling, and no relationship.
5. in an experiment, the variable that researchers look at for change.
6. in an experiment, the variable that researchers change in an effort to cause change in another variable.
7. one type of research method in which the investigator manipulates one or more independent variables (iv) to determine the effect(s) on some behavior (the dependent variable) while controlling other relevant factors.
8. when an experimental study is conducted again in the same way but using different participants, allowing researchers to find out if results can generalize to other participants and maybe even other situations.
9. a testable prediction about the relationship between at least two events, characteristics, or variables.
10. the tendency to believe, once the outcome is already known of course, that you would have forseen even though it's over and you know the outcome, you knew it all along.