What's the difference between accuracy and validity?

Accuracy


Definition:

  • (n.) The state of being accurate; freedom from mistakes, this exemption arising from carefulness; exact conformity to truth, or to a rule or model; precision; exactness; nicety; correctness; as, the value of testimony depends on its accuracy.

Example Sentences:

  • (1) When subjects centered themselves actively, or additionally, contracted trunk flexor or extensor muscles to predetermined levels of activity, no increase in trunk positioning accuracy was found.
  • (2) Accuracy of discrimination of letters at various preselected distances was determined each session while Ortho-rater examinations were given periodically throughout training.
  • (3) To determine the accuracy of double-contrast arthrography in complete rotator cuff tears, we studied 805 patients thought to have a complete rotator cuff tear who had undergone double-contrast shoulder arthrography (DCSA) between 1978 and 1983.
  • (4) An experimental model was established in the ewe allowing one to predict with accuracy an antral follicle that coincidentally would either undergo ovulation (6-8 mm diameter) or atresia (3-4 mm diameter) following synchronization of luteal regression and the onset of the gonadotropin surge.
  • (5) Correlations and some clinically relevant comparisons suggested that the MMPI 168 predicted the standard MMPI with a high degree of accuracy.
  • (6) Technical manipulations to improve resolution were time consuming and added little to the accuracy of the test.
  • (7) The positive predictive accuracy of a biophysical profile score of 0, with mortality and morbidity used as end points, was 100%.
  • (8) 83 well documented cases of amoebic hepatic abscess, treated in the Philippines between 1967 and 1975, are presented with a view to showing the results of 3 different methods of management and comparing the diagnostic accuracy and overall mortality in 2 separate groups.
  • (9) The sensitivity , accuracy, and reproductibility of this method are described and discussed.
  • (10) In invasive epidermoid carcinoma, the accuracy with the self-collected specimens approached the physician-scraped specimens.
  • (11) While the correlations between speed and accuracy reversed over time, the abnormal vision group began and ended at the most extreme levels, having undergone a significantly more radical shift in this regard.
  • (12) This longitudinal study compares the accuracy of self-assessments of 22 students across four examinations during their first 2 years of medical school.
  • (13) 18 patients with typical sporadic Amyotrophic Lateral Sclerosis (ALS) were investigated by the Motor Accuracy and Speed Test (MAST) and 18 healthy age- and-sex-matched volunteers, acted as controls.
  • (14) We assume that the fragments have been assembled and address the problem of determining the degree to which the reconstructed sequence is free from errors, i.e., its accuracy.
  • (15) Labelling of the albumin with 99mTc ensured an accuracy of measurements only limited by the precision of the weighing.
  • (16) This procedure yields excellent precision and accuracy, as demonstrated by the analysis of a known amino acid mixture and of neonatal plasma.
  • (17) The midsystolic Doppler velocity showed the highest predictive accuracy (94%) for the detection of severe aortic stenosis.
  • (18) By completing these three steps, we feel that we have improved the overall accuracy of our custom block making system which has resulted in more accurate treatments for our patients.
  • (19) This data gives the radiotherapist some useful parameters for the selection of applicators and general knowledge of the accuracy of the system.
  • (20) In contrast, US-guided FNAC had an accuracy of 89% (62 of 70), a sensitivity of 76% (25 of 33), and a specificity of 100% (37 of 37).

Validity


Definition:

  • (n.) The quality or state of being valid; strength; force; especially, power to convince; justness; soundness; as, the validity of an argument or proof; the validity of an objection.
  • (n.) Legal strength, force, or authority; that quality of a thing which renders it supportable in law, or equity; as, the validity of a will; the validity of a contract, claim, or title.
  • (n.) Value.

Example Sentences:

  • (1) Unfortunately, due to confidentiality clauses that have been imposed on us by the Department of Immigration and Border Protection, we are unable to provide our full names and … titles … However, we believe the evidence that will be submitted will validate the statements that we are making in this submission.” The submission detailed specific allegations – including names and dates – of sexual abuse of child detainees, violence and bullying of children, suicide attempts by children and medical neglect.
  • (2) Recently, the validity of the American Thoracic Society (ATS) standards for selection of spirometric test results has been questioned based on the finding of inverse dependence of FEV1 on effort.
  • (3) Single-case experimental designs are presented and discussed from several points of view: Historical antecedents, assessment of the dependent variable, internal and external validity and pre-experimental vs experimental single-case designs.
  • (4) An application is made to the validity of cancer risk items included in a cancer registry.
  • (5) Although measurements are easily obtained with a tape measure, the validity of these measurements is not known.
  • (6) This observation, reinforced by simultaneous determinations of cortisol levels in the internal spermatic and antecubital veins, practically excluded the validity of the theory of adrenal hormonal suppression of testicular tissues.
  • (7) However, each of the studies had numerous methodological flaws which biased their results against finding a relationship: either their outcome measures had questionable validity, their research designs were inappropriate, or the statistical analyses were poorly conceived.
  • (8) We found no statistically significant difference in one-year, biochemically validated, sustained cessation rates between the group offered the long-term follow-up visits (12.5%) and the group given the brief intervention (10.2%).
  • (9) Although, it did give me the confidence to believe that my voice was valid and important.
  • (10) Both demonstrated concurrent validity and feasibility.
  • (11) Specifically, we apply techniques of data preprocessing, orthogonality constraints, and validation of solutions in a complete TC analysis, for the first time using actual MEP data.
  • (12) However, no evidence could be discerned to support its validity as a measure of a patient's treatment outcome.
  • (13) Validation studies, to show that the method is precise, accurate and rectilinear, have been carried out on four linctus formulations and two pastille formulations.
  • (14) In this paper the domain of validity of the unlabelled and labelled minimal models of glucose disappearance is studied.
  • (15) However, valid electroacoustic evaluation of the DMHAs cannot be accomplished using the conventional hearing aid test box.
  • (16) Validity of the fructosamine assay allows its potential use as a mass screening test for diabetes in these populations (USA, Africa, Caribbean...).
  • (17) Furthermore, CV1% and DV6% have proved to be valid parameters in finding differences in the light reflex in non-age-matched study groups.
  • (18) A role for cAMP in the process of LHRH release was suggested several years ago, but only recently has the validity of this notion come under close scrutiny.
  • (19) However the study does not permit to reach any valid conclusions; further elaborate investigations alone could prove the useful role of genetic influence in the propagation of lepromin sensitivity to the subsequent sibs.
  • (20) From the subcutaneous transplanted tumors a large number of MLuC1-positive tumor cells could easily be recovered, thus indicating the validity of the in vivo methodology.