Control groups

Controlled variables

All those things that must be kept the same during the investigation to produce a valid, fair test.

The control group is considered

Baseline data

known as constants

Controlled variables

Generates data under abnormal/unknown condition

Experimental (group)

Generates data under treated/manipulated conditions

Experimental (group)

Results are compared to the ones of the control group to help determine possible impacts of a treatment/manipulation

Experimental (group)

negative control group

Not exposed to the experimental treatment or any treatment known to have an effect (Negative control groups help identify outside influences which may be present that were not unaccounted for, such as contaminants.)

What are negative and positive control groups used for

can be used to validate experimental procedures

positive control group

group where an effect is expected

Controlled variables are used to

help isolate and identify the impact of an intentional change/treatment

What are the different types of control groups

negatives and positives

control group

the group that does not receive the experimental treatment.