![]() For instance, to understand the functioning of a test, it is important that the test which is used consistently discriminates individuals at one time or over a course of time. ![]() ![]() Reliability Reliability is a major concern when a psychological test is used to measure some attribute or behaviour (Rosenthal and Rosnow, 1991). Because most behavioural research takes place within this paradigm, measurement instruments must be valid and reliable. The measurement of human behaviour belongs to the widely accepted positivist view, or empirical analytic approach, to discern reality (Smallbone & Quinton, 2004). 1 Topic Overview - Reliability and Validity in Research Learning Outcomes: LO.1 Assess the philosophy, principles and methodologies underlying research Introduction An important part of social science research is the quantification of human behaviour - that is, using measurement instruments to observe human behaviour.
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