Unit 3 - Topic 2 - Experimentation - Section B - Experimental Design - Part III - 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

What is a negative control

Answer 2

The negative control provides results in the absence of a treatment

Question 3

What is a 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

How can placebos be introduced

Answer 4

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

Question 5

What is the 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.