M1L4 Experimental Methodology

A variable that is free to vary and is manipulated by the experimenter

• Independent variable
• random assignment
• likert scale
• Hypothesis

A variable whose values are the result of changes in independent variables

• Dependent variable
• Single-blind procedure
• qualitative method
• Variable

A research method that manipulates one independent variable (IV) and then looks for an effect on a dependent variable (DV), while other potentially important variables are controlled

• Experiment
• Placebo effect
• structured interview
• falsifiable

The group of subjects receive the treatment.

• Experiment group
• Double-blind procedure
• Target population
• Operational definition

The group of subjects do not receive the treatment.

• Control group
• Experimenter bias
• Sample
• Replication

a factor other than the independent variable that might produce an effect in an experiment

• Confounding variable
• Hypothesis
• Sampling
• data

assigning participants to experimental and control conditions by chance, thus minimizing preexisting differences between two groups

• random assignment
• Variable
• sampling bias
• quantitative method

research design in which participants don't know whether they are in the experimental or control group

• Single-blind procedure
• falsifiable
• representative
• likert scale

the phenomenon in which the expectations of the participants in a study can influence their behavior

• Placebo effect
• Operational definition
• random sampling
• qualitative method

research design in which neither subjects nor experimenters know which subjects are in the experimental or control groups.

• Double-blind procedure
• Replication
• convenience sampling
• structured interview