Reliability is a concern every time a single observer is the source of data, because we have no certain guard against the impact of that observer’s subjectivity” (Babbie, 2010, p.158). In simple terms, if your research is associated with high levels of reliability, then other researchers need to be able to generate the same results, using the same research methods under similar conditions. It is noted that “reliability problems crop up in many forms. Reliability refers to the extent to which the same answers can be obtained using the same instruments more than one time. Explicit criteria also counter criticisms of subjectivity.Issues of research reliability and validity need to be addressed in methodology chapter in a concise manner. The context, tasks and behaviours desired are specified so that assessment can be repeated and used for different individuals. Clear, usable assessment criteria contribute to the openness and accountability of the whole process.
2,13Įxplicit performance criteria enhance both the validity and reliability of the assessment process. evidence of achievement arising spontaneously or incidentally.reliance on assessors to make judgements without bias.However, the following factors impede both the validity and reliability of assessment practices in workplace settings: Assessments are usually expected to produce comparable outcomes, with consistent standards over time and between different learners and examiners. Reliability refers to the extent to which an assessment method or instrument measures consistently the performance of the student. Performance based assessments are typically viewed as providing more valid data than traditional examinations because they focus more directly on the tasks or skills of practice. Relates to whether scores reflect the items being tested. Relates to whether the assessment method is explicit in terms of procedures correlating with particular behaviours The assessment method matches the content of the work The different types of validity include: Validity Validity refers to the degree to which a method assesses what it claims or intends to assess. Validity and reliability of assessment methods are considered the two most important characteristics of a well-designed assessment procedure.
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