Psych 209: Chapter 7 Vocab Flashcards
Exam 2
Independent Groups Design
A between-subjects design that uses a manipluated independent variable and has at least two groups of participants
Subjects are randomly assigned to the groups
Matched Group Design
A between-subjects design that uses a manipulated independent variable and has at least two groups of participants
Subjects are matched on some variable assumed to affect the outcome before being randomly assigned to the groups
Nonequivalent Groups Design
A between-subjects design with at least two groups of participants that uses a subject variable or that creates groups that are nonequivalent
Repeated Measured Design
Another name for within-subjects design
participants are tested in each of the experiment’s conditions
Single-Factor Multilevel Design
Any design with a single independent variable and more than two levels of the independent variable
Nonlinear Effects
Any outcome that does not form a straight line when graphed
can occur only when the independent variable has more than two levels
Continuous Variable
Variable for which an infinite number of values potentially exist.
Ex. a drug’s dosage level
Discrete Variable
Variable in which each level represents a distinct category that is qualitatively different from another category
Ex. Males and females
Placebo Control Group
Control group in which some participants believe they are receivingthe experimental treatment, but they are not
Waiting List Control Groups
Control group in which the participants aren’t yet receiving treatment but will eventually
Used to ensure that those in the experimental and the control groups are similar (eg all seeking treatment for the same problem)
Yoked Control Group
Control group in which the treatment given a member of the control group is matched with the treatment given a member of the experimental group
Error Bars
On a bar or line graph, they indicate the amount of variability around the mean
Often reflect standard deviations or confidence intervals
