Is this a cross - sectional study?

Single Subject Design Follows?

It has ______, ________ and _______ Characteristic

What kind of extraneous variable it is?

Does the Age can be a extraneous variable?

What kind of group is the right side?

Krisha wants to reduce the noise produce by the sound coming from the area of the participants. What technique can be used?

If the effect of relevant variables cannot be eliminated, control can be done by keeping the variable constant for all the subjects used in the experiment.