Chapter 9 Flashcards
Research designs
The outline plan, or strategy used to investigate the research question
Experimental desgin
Manipulation of independent variables
- Involves testing a hypothesis
- Provides evidence for cause-effect relationships
- Control for extraneous variables
Quasi-experimental designs
A research design in which an experimental procedure is applied but all extraneous variables are not controlled
- the independent variable is not manipulated by the experimenter
Single case research designs
A research design in which a single participant or a single group of individuals is used to investigate the influence of a treatment condition
- Evaluation of change (by the intervention or treatment)
- E.g., effectiveness of therapy/intervention/training method
Between-participants designs
An experimental design where participants are separated into different conditions (experimental vs. control)
- Produced by random assignment
- Exposed to the different levels of the independent variable (uses a between-participants IV
Within-participants design
An experimental design where all participants are in one group and experience the same conditions
Mixed designs
A combination of between-and within-participants independent variables, it must have at least one between-participants independent variable and at least one within-participants independent variable
Factorial designs
Two or more independent variables are studied to determine their separate and joint effects on the dependent variable
Factor (factorial design)
A circumstance, fact, or influence that contributes to a result or outcome
- Each independent variable can be thought of as a factor
- E.g., 3 independent variables = 3 factors - Each factor must have 2 or more levels
Level (factorial design)
A position on a scale that denotes amount, quantity, extent, or quality
- E.g., biological sex (female, male) = 2 levels
- only for independent variables (not dependent variables)
