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词汇 false positive
释义

Definition of false positive in English:

false positive

noun
  • A test result which wrongly indicates that a particular condition or attribute is present.

    stress testing, a routine diagnostic tool used in detecting heart disease, results in a significant number of false positives in women
    as modifier the computer-aided system may return false positive results
    Example sentencesExamples
    • This solution has proven to be greatly effective and produces few false positives.
    • The rate of false positives was also discouraging.
    • False positives can lead to additional, more invasive tests including coronary angiography.
    • Shadows, occlusions, reflections, and multiple uncontrolled light sources all increase the risk of false positives.
    • False positive rates on breast / prostate screenings dictate that we're spending money treating people who aren't sick.
    • A new set of psychic problems has been produced in the past few years for women who had false positive results in a screening mammogram for cancer of the breast and who were not effectively reassured by subsequent tests showing the absence of breast cancer.
    • An abnormal result, whether it's a false positive or true positive, generally leads to additional testing, and it's the additional tests that could have some risk.
    • The doctor notes the techniques being used can pick up a single molecule, so false positives are a strong possibility.
    • If a detection technology isn't precise enough, such particles can trigger a false positive.
    • Says Landolt, "The result can be a false positive - indicating a problem pest population when one doesn't exist - or a false negative - indicating no problem exists when mated females are present and laying eggs."
    • As your detection rate increased, so did your false positive rate.
    • Experts believe the lab contracted by the DOD to conduct the tests may have triggered a "false positive" by accidentally tainting the test swab with an anthrax sample already on hand.
    • Fingerprint identification systems have approached 99 percent accuracy and, perhaps more importantly, a slim 0.01 false positive rate - or only about one in 10,000 scans resulting in a misidentification.
    • As with all recognition problems, the issue is accuracy: Make the system very sensitive, and you will get many false positives; make the system less sensitive, and important events will slip right through the cracks.
    • CT and MRI scans can lead to false positives and unnecessary operations, which carry the risk of complications like infections and bleeding.
    • A rare, lethal disease with painful treatment, on the other hand, requires a diagnostic tool with very few false positives and negatives.
    • I went on to have a perfectly healthy baby boy, but the stress from getting a false positive on the quads test was the most stressful thing I've ever been through.
    • Some results are false positives suggesting abnormalities in actually healthy hearts.
    • Experiments with expensive facial-recognition devices in several airports produced so many false positives - identifying startled innocents as fugitives from justice - that the technology is no longer considered useful.
    • The test accurately gave a negative result for those without HIV in 99.98 percent of cases, meaning there would be only one false positive result out of every 5,000 tests.

Definition of false positive in US English:

false positive

noun
  • A test result which incorrectly indicates that a particular condition or attribute is present.

    stress testing, a routine diagnostic tool used in detecting heart disease, results in a significant number of false positives in women
    as modifier the computer-aided system may return false positive results
    Example sentencesExamples
    • Shadows, occlusions, reflections, and multiple uncontrolled light sources all increase the risk of false positives.
    • The test accurately gave a negative result for those without HIV in 99.98 percent of cases, meaning there would be only one false positive result out of every 5,000 tests.
    • This solution has proven to be greatly effective and produces few false positives.
    • An abnormal result, whether it's a false positive or true positive, generally leads to additional testing, and it's the additional tests that could have some risk.
    • Experiments with expensive facial-recognition devices in several airports produced so many false positives - identifying startled innocents as fugitives from justice - that the technology is no longer considered useful.
    • A rare, lethal disease with painful treatment, on the other hand, requires a diagnostic tool with very few false positives and negatives.
    • The rate of false positives was also discouraging.
    • Some results are false positives suggesting abnormalities in actually healthy hearts.
    • I went on to have a perfectly healthy baby boy, but the stress from getting a false positive on the quads test was the most stressful thing I've ever been through.
    • CT and MRI scans can lead to false positives and unnecessary operations, which carry the risk of complications like infections and bleeding.
    • A new set of psychic problems has been produced in the past few years for women who had false positive results in a screening mammogram for cancer of the breast and who were not effectively reassured by subsequent tests showing the absence of breast cancer.
    • False positive rates on breast / prostate screenings dictate that we're spending money treating people who aren't sick.
    • Says Landolt, "The result can be a false positive - indicating a problem pest population when one doesn't exist - or a false negative - indicating no problem exists when mated females are present and laying eggs."
    • Fingerprint identification systems have approached 99 percent accuracy and, perhaps more importantly, a slim 0.01 false positive rate - or only about one in 10,000 scans resulting in a misidentification.
    • As your detection rate increased, so did your false positive rate.
    • As with all recognition problems, the issue is accuracy: Make the system very sensitive, and you will get many false positives; make the system less sensitive, and important events will slip right through the cracks.
    • If a detection technology isn't precise enough, such particles can trigger a false positive.
    • Experts believe the lab contracted by the DOD to conduct the tests may have triggered a "false positive" by accidentally tainting the test swab with an anthrax sample already on hand.
    • False positives can lead to additional, more invasive tests including coronary angiography.
    • The doctor notes the techniques being used can pick up a single molecule, so false positives are a strong possibility.
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