single-blind trial
single-blind study

Effect of an Indo-Mediterranean diet on progression of coronary artery disease in high risk patients (Indo-Mediterranean Diet Heart Study) a randomised single-blind trial.

Single-blind trials are especially risky in psychology and social science research, where the experimenter has an expectation of what the outcome should be, and may consciously or subconsciously influence the behavior of the subject.

Streitberger K, Friedrich-Rust M, Bardenheuer H, et al.: Effect of acupuncture compared with placebo-acupuncture at P6 as additional antiemetic prophylaxis in high-dose chemotherapy and autologous peripheral blood stem cell transplantation: a randomized controlled single-blind trial.

One small single-blind study found that intravenous administration of ghrelin to anorexia nervosa patients increased food intake by 12-36% over the trial period.

In December 2005 the journal Nature conducted a single-blind study comparing the accuracy of a sample of articles from Wikipedia and Encyclopædia Britannica.

A single-blind study comparing this combination to adapalene, a retinoid, also found it to work faster and be significantly better tolerated than adapalene, as well as more effective.

SINGLE-BLIND STUDY: A study in which one party, either the investigator or participant, is unaware of what medication the participant is taking; also called single-masked study.