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Tests of general relativity on the largest scales are not nearly so stringent as Solar System tests. [129] The earliest such test was the prediction and discovery of the expansion of the universe. [130] In 1922, Alexander Friedmann found that the Einstein equations have non-stationary solutions (even in the presence of the cosmological constant).
In medical diagnosis, test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease (true negative rate). If 100 patients known to have a disease were tested, and 43 test positive, then the test has ...
A hypothetical ideal "gold standard" test has a sensitivity of 100% concerning the presence of the disease (it identifies all individuals with a well-defined disease process; it does not have any false-negative results) and a specificity of 100% (it does not falsely identify someone with a condition that does not have the condition; it does not have any false-positive results).
The Wechsler Adult Intelligence Scale (WAIS) is an Intelligence Quotient (IQ) test designed to measure intelligence and cognitive ability in adults and older adolescents. [1] For children between the ages of 6 and 16, Wechsler Intelligence Scale for Children (WISC) is commonly used.
Tests in stronger gravitational fields are provided by the observation of binary pulsars. [69] All results are in agreement with general relativity. [70] However, at the current level of accuracy, these observations cannot distinguish between general relativity and other theories in which the equivalence principle is valid. [71]
Content validity evidence involves the degree to which the content of the test matches a content domain associated with the construct. For example, a test of the ability to add two numbers should include a range of combinations of digits. A test with only one-digit numbers, or only even numbers, would not have good coverage of the content domain.
The Thematic Apperception Test (TAT) is a projective psychological test developed during the 1930s by Henry A. Murray and Christiana D. Morgan at Harvard University. Proponents of the technique assert that subjects' responses, in the narratives they make up about ambiguous pictures of people, reveal their underlying motives, concerns, and the ...
CAM tests are not covered by health insurance. [6] The number of CAM laboratories is unknown and the sales of supplemental remedies based on the results of these tests is unknown. [11] Since CLIA does not regulate the clinical validity/usefulness of a test, it is possible for a CLIA laboratory to offer tests that have no clinical utility. [8] [12]