Stability or test-retest reliability is the degree to which the same test produces the same results when repeated under the same conditions; Equivalence or alternate-form reliability is the degree to which alternate forms of the same measurement instrument produce the same result Homogeneity is the extent to which various items legitimately team together to measure a single characteristic, such as a desired attitude.
In a clinical examination, obtaining reliability depends on three variables: the students, the examiners and the patients. Such complexity makes it difficult to reproduce a comparable situation for tests of clinical skill and clinical problem-solving. In a reliable assessment procedure, the variability due to the patient and the examiner should be removed. Wherever possible, a subjective approach to marking should be replaced by a more objective one and students should be tested by a number of examiners. It is important to note that students are usually examined using different patients, which may enhance the performance of some students and harm the performance of others. Therefore, tests which aim to assess clinical skills and clinical problem-solving have to contain many samples of student performance if they are to achieve adequate levels of reliability. The development of the multi-station objective structured clinical examination (OSCE) represents an effort to do so. Reproducibility of Assessment Consistency in producing the same results if a test is repeated is a vital attribute of any test. It is important to know that if the same examinees were given the same test after some time and learned nothing in the interim, the same scores would result. Reproducibility is especially important in making licensure and certification decisions. Research Scientific inquiry or an organized quest for new knowledge and better understanding, such as of the natural world or determinants of health and disease. Research can take several forms: empiric (observational), analytic, experimental, theoretical and applied. Residency The period of training in a specific medical specialty. It occurs after graduation from medical school and its length varies from three to seven years, depending upon the specialty. Resident or Resident Physician An individual at any level in a Graduate Medical Education program, including subspecialty programs. Other terms used to refer to these individuals include interns, house officers, house staff, trainees, or fellows. The term "intern" is often used to denote physicians in their first year of training. The term "fellow" is frequently used to denote physicians in subspecialty programs (versus residents in specialty programs) or in Graduate Medical Education programs that are beyond the eligibility requirements for first board certification in the discipline. Risk Factor An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which on the basis of epidemiological evidence is known to be associated with an unfavorable health-related condition and considered important to prevent, if possible. It is used as an indication of increased probability of a specified health outcome such as the occurrence of a disease but is not necessarily a causal factor. The term risk factor is further used to mean a determinant that can be modified by intervention, thereby reducing the probability of occurrence of disease or other specified outcomes.
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