Monthly Archives: February 2018

What Causes a False Positive Drug Test Result

forensic toxicology working group members February 23, 2018 Forensic Toxicology

This article explains What Causes a False Positive Drug Test Result and the scientific, legal or practical evidence readers should understand.

The Accuracy of Alcohol Testing

forensic toxicology working group members February 20, 2018 Forensic Toxicology

This article explains The Accuracy of Alcohol Testing and the scientific, legal or practical evidence readers should understand.

Forensic Toxicology: How Drugs Affect Driving

forensic toxicology working group members February 16, 2018 Forensic Toxicology

This article explains Forensic Toxicology: How Drugs Affect Driving and the scientific, legal or practical evidence readers should understand.

Recent Blog Articles

October 31, 2026

A Standard Breakfast Was Part of the Oral-THC Challenge Protocol

The oral-THC study administered a standard light breakfast before dosing. Its findings came from a controlled food-and-dose schedule rather than unrestricted edible use. The morning procedure was standardized Participants arrived after fasting overnight, underwent screening and baseline assessments, and received a light breakfast 90 minutes before oral dronabinol. Active and…

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October 31, 2026

Alternate Word Lists Helped Control Practice Effects in the Oral-THC Memory Study

The oral-THC crossover experiment used alternate forms of a verbal-learning test and counterbalanced their presentation. This addressed a practical problem: repeating a memory task can change performance even without a drug effect. The task involved learning word lists The Rey Auditory Verbal Learning Test includes repeated learning, an interference list…

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October 31, 2026

Hormonal-Cycle Restrictions Narrowed the Oral-THC Study’s Female Sample

The oral-THC study included women using hormonal contraception or tested in the early follicular phase. Its sex comparison did not test responses across every menstrual-cycle phase. The restriction served an experimental purpose The authors describe limiting variation in ovarian steroids by including women under those conditions. This can reduce one…

Read Article: Hormonal-Cycle Restrictions Narrowed the Oral-THC Study’s Female Sample