Experimental research has demonstrated that when actual interrogation training videos are used, training the ability to detect deception and makes people confident about their judgments.

D. does not improve; more

Explanation:

These are the options for the question

A. improves; more

B. improves; less

C. does not improve; less

D. does not improve; more

Experimental research can be regarded as a study which is attributed

strictly to a scientific research design. It involves using of hypothesis, when carrying out experiment variable which can be manipulated by the person making research can be used as well as variable that allows measurement, comparism and calculation. It should be noted that Experimental research has demonstrated that when actual interrogation training videos are used, training does not improve the ability to detect deception and makes people more confident about their judgments