Voice stress analysis evaluates a subject's vocal response to a series of test questions. VSA is similar to the popular polygraph test. To avoid issues due to unfamiliarity with the test, VSA respondents must prepare for both increased stress levels and specific test conditions. In addition, test subjects must research the history of the test while evaluating test use and proper procedure.
Research VSA. Find information in the public library system or visit online resources that detail the parameters of the test. In addition, study the history regarding development and implementation of the test. Study the various uses of the test while researching any controversy or legal actions filed regarding test use and procedures.
Prepare for any voice-related testing by practicing intonation, delivery and consistency in voice levels. For example, create a set of sample sentences or simply read aloud from a book or newspaper article. Introduce background noise or practice in a noisy area to increase stress levels. Focus on maintaining an even tone while avoiding drastic changes in both body language and vocal delivery.
Avoid drugs that may affect your voice. Limit or avoid caffeine, tobacco or alcohol prior to the beginning of VSA. Before the test, declare the use of any prescription drugs and any diagnosed speech and communication issues.
Prior to and during VSA, practice relaxation techniques aimed to combat stress and promote a relaxed mood. Use methods aimed at relaxing the entire body while emphasizing proper breathing techniques. In addition, practice breathing in a seated situation to mimic test conditions.
While VSA remains a controversial tool, the best way to satisfactorily complete a test is to remain truthful when responding to questions.