Psychology Dictionary

What Are Practice Effects?

Sometimes in psychology experiments, groups of participants are required to take the same test more than once. In some cases, performance can change from the first instance of testing and the next simply due to […]

Extraneous variable
Psychology Dictionary

What Is an Extraneous Variable?

Extraneous variables are anything in a psychology experiment other than the independent and dependent variables. The variables can present challenges and introduce errors, so it is important for experiments to control these extraneous factors. How […]