A social psychologist wants to determine if the number of bystanders present during an emergency affects how long it takes for an individual to help. The psychologist stages an emergency in a public space and systematically varies whether there are one, three, or ten other people present. The researcher then measures the time it takes for a participant to intervene and offer assistance. In this experiment, what is the dependent variable?

Example of an Experiment: Note-Taking Method and Learning Performance

Extraneous Variable

Time Series

Confounding Variable

Internal Validity

Null Result

Non-Experimental Research

In an experimental study, which of the following best describes the dependent variable?

In a psychological experiment investigating whether a new mnemonic technique improves memory recall, the students' memory recall scores represent the dependent variable.