Answer:
Control
Explanation:
Experimental control: In research, the term experimental control is defined as a technique used by an experimenter to minimize or decrease the effects of environmental variables and extraneous experience and therefore strengthening the interference that leads to change in the dependent variable because of the presence of the independent variable.
Function: It holds constant particular variables in an experiment for which the researcher is not interested to measure.
In the question above, Roberto has successfully created an experimental control.
Answer:
The stage of human social and cultural development and organization that is considered most advanced.
Answer:
pollution
Explanation:
The smoke directly contributes to pollution.
The correct answer would be, Carryover Effect.
In this case, the study is contaminated by a Carryover Effect.
Explanation:
When an individual subject or a group of subjects, carries over from one experiment to another experiment, this is called as the carryover effect.
In carryover effect, subjects are exposed to one experiment, and then after some time they are carried over to another experiment. This effect is called as the Carryover Effect.
In the given example, Juan carried out experiment to check the effectiveness of two drugs in treating migraines on the same participant but with a gap of 8 hours. After 8 hours, the first drug was still in participant's system. In such a case, the study has been said to be contaminated by the Carryover Effect.
The true results of both drugs would have seen if the second drug was given to the participant when the first drug was completely out of the body of the participant.
Learn more about Carryover Effect in other scenarios at:
brainly.com/question/12203949
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