[sing-guh
l-blahynd] 
| of or pertaining to an experiment or clinical trial in which the researchers but not the subjects know which subjects are receiving the active medication or treatment and which are not: a technique for eliminating subjective bias, as the placebo effect, from the test results. |
| single blind n. A testing procedure in which the administrators do not tell the subjects if they are being given a test treatment or a control treatment in order to avoid bias in the results. sin'gle-blind' (sĭng'gəl-blīnd') adj. |
single blind sin·gle blind (sĭng'gəl)
n.
A testing procedure in which the administrators do not tell the subjects if they are being given a test treatment or a control treatment, used in an effort to avoid accidental bias in the results.