controls

Question 1

what are control results used for?

Answer 1

Control results are used for comparison with the results of treatment
groups

Question 2

negative control

Answer 2

The negative control provides results in the absence of a treatment.

Question 3

positive control

Answer 3

A positive control is a treatment that is included to check that the system
can detect a positive result when it occurs.

Question 4

placebos

Answer 4

Placebos can be included as a treatment without the presence of the
independent variable being investigated.

Question 5

placebo effect

Answer 5

Placebo effect is a measurable change in the dependent variable as a
result of a patient’s expectations, rather than changes in the independent
variable.