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The 27 pages that link to False positive, each with the reason it gives.

• Prenatal diagnosisRelated: Screening false positives can prompt diagnostic testing and affect decisions.

• Preimplantation genetic testingRelated: A false-positive embryo result may wrongly exclude an embryo from transfer.

• BiosignatureRelated: Nonbiological chemistry can produce candidate signals that resemble biosignatures.

• Diagnostic testRelated: False positives can prompt unnecessary follow-up or treatment.

• Forensic psychologyRelated: Risk tools can wrongly classify people as dangerous, with serious consequences for liberty.

• Reference rangeRelated: Even healthy people can fall beyond a reference limit by chance.

• Developmental screeningRelated: A positive developmental screen can occur without a later diagnosis, making confirmatory evaluation essential.

• Facial recognition systemRelated: An incorrect facial match can wrongly associate a person with an identity or event.

• Pregnancy testRelated: Rare causes include certain fertility medicines and hCG remaining after a recent pregnancy.

• Airport securityRelated: Screening systems must balance missed threats against unnecessary alarms and searches.

• Liquid biopsyRelated: Non-tumor DNA sources and uncertain findings can produce misleading positive signals.

• Insurance fraudRelated: Fraud screening can wrongly flag honest policyholders for investigation.

• Intrusion detection systemRelated: Benign activity misclassified as an attack creates alerts analysts must investigate.

• Stool antigen testRelated: Cross-reaction, contamination, or testing after recent infection can lead to misleading positives.

• ExomoonRelated: Stellar variability and instrumental effects can imitate an exomoon signal.

• Extraterrestrial lifeRelated: Nonbiological chemistry can imitate proposed signs of life in planetary data.

• Medical testRelated: False positives can trigger anxiety, follow-up procedures, or unnecessary treatment.

• Qualitative analysisRelated: Interfering substances can trigger a qualitative test’s expected signal.

• Blood testRelated: Unexpected abnormal blood results can trigger follow-up even without the suspected disease.

• Gliese 581dRelated: If stellar activity caused the signal, the apparent detection of Gliese 581d is a false positive.

• Law of Truly Large NumbersRelated: Screening many people can produce numerous false positives even when each test has a low false-positive rate.