In the context of paralanguage, _____ is the loudness or softness of vocal tone.

Inverted word order and antithesis are effective means of creating rhythm in a speech

Indicate whether the statement is true or false

To control confounding variables in experimental research, researchers can use several techniques. Which one is appropriate to control this problem?

a) Randomization b) Using field experiment c) Observing subjects all the time d) Including another variable in the design