The experiment compares the values of a response variable based on the different levels of that primary factor.

Statisticians recommend that experiments compare (at least) one new treatment with a standard treatment or control, to allow an unbiased estimate of the difference in treatment effects.

Earlier experiments had compared the Earth's gravitational attraction with the centrifugal force from its own rotation.

Another basic experiment compares recognition of naturally spoken words presented in a sentence (or at least a phrase) and the same words presented in isolation.

Double-blind experiments comparing the effects of the drug Danzen, which debuted in 1968, and placebos showed no significant differences between the two, the major drugmaker said.

However, no properly controlled experiments have compared these drugs in humans.

With your own ingenuity, invent similar experiments and each time compare the two theories-"selective attention" (coincidence) vs. "mind controls everything" (psychokinesis).

One particular experiment compares the neural bases of antisocial behavior and morality.

Such simple derivations ignore the fact that in general relativity the experiment compares clock rates, rather than energies.

A properly designed experiment would compare ignitability in at least three concentrations of oxygen, such as 20% (air), 50%(or concentrator max.)