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Bias
A systematic error that skews results in a particular direction.
Interview
A qualitative research method in which the researcher asks open or semi-open questions and records the participant's answers.
Observation
A research method that records behaviour directly, without asking the participant to report it.
Operationalization
Defining an abstract concept in terms of specific, observable, and measurable variables.
Random Assignment
Sorting participants into experimental conditions by chance, so each participant has an equal probability of being in any condition.
Reliability
The consistency of a measure across occasions, coders, or items.
Research Methods
The tools psychologists use to investigate questions and test hypotheses.
Social Desirability Bias
The tendency for participants to answer in a way that makes them look good rather than report honestly.
Survey
A research method that collects self-report data from a large sample using a standardised questionnaire.
Validity
The extent to which a measure accurately reflects the construct it is intended to measure.