Aspecialty shoe manufacturer developed a new insole for running shoes. a study was produced in which some participants were given the insoles of a competitor’s product without the participants’ knowledge. which element of experiment design is known to be a part of this study? a. blinding b. randomization c. replication

The element of experiment design here is blinding experiment.

A blinding experiment is the practice of not telling its subjects (people who are undertaking the experimental trial) what they are given and through which source. This is an important methodological feature as it minimizes bias and maximize the validity of the results.

So, here it is a blinding experiment as the participants do not know whether they are receiving the competitor's product or the manufacturer's product.