In research, an unobtrusive measure is a method of making observations without the knowledge of those being observed. Unobtrusive measures are designed to minimize a major problem in social research, which is how a subjectâs awareness of the research project affects behavior and distorts research results.hree types of unobtrusive measurement are discussed here... An indirect measure is an unobtrusive measure that occurs naturally in a research context. The researcher is able to collect the data without introducing any formal measurement procedure.....Content analysis is the analysis of text documents.
patellar reflex. n. A reflex contraction of the quadriceps muscle resulting in a sudden involuntary extension of the leg, produced by a sharp tap to the tendon below the patella. Also called knee jerk, knee-jerk reflex, knee reflex, quadriceps reflex.
Definition of Knee jerk. Knee jerk: The reflex that is tested by tapping just below the bent knee on the patellar tendon. Normally this causes the quadriceps muscle to contract and bring the lower leg forward. It has given rise to the saying 'a knee-jerk reaction.' Also known as patellar reflex. Last Editorial Review: 5/13/2016.