Research Methods 1

when participants only experience one condition in an experiment

• Matched pairs

• Independent samples

• Repeated measures

• Independent variable

Any variable other than the IV that might affect the DV.

• independent variable

• dependent variable

• Extraneous variable

• Control

When participants are separated in an independent samples design using a statistically random method (e.g. random number generator).

• Repeated measures

• Order effect

• Control

• Random allocation

When participants experience all (usually two) conditions in an experiment.                     

• Matched pairs

• Independent samples

• Repeated measures

• Independent variable

When participants are matched on a characteristic and then put in separate conditions in an experiment.

• Matched pairs

• Independent samples

• Repeated measures

• Independent variable

Any action taken by a researcher to limit the effect of an extraneous variable on the DV.             

• Control

• Single-blind design

• Counter-balancing

• Participant variability

When the participant doesn’t know which condition of the experiment they are experiencing.          

• Control

• Single-blind design

• Counter-balancing

• Participant variability

Differences between participants (other than the IV) that might affect results.     

• Control

• Single-blind design

• Counter-balancing

• Participant variability

When the order in which participants experience conditions in a repeated measures design has an effect on the results. 

• Repeated measures

• Order effect

• Control

• Random allocation

When the researcher nor the participant know which condition of the experiment they’re experiencing (in animal studies we simply say ‘blind design’).           

• Double-blind design

• Single-blind design

• Counter-balancing

• Participant variability