This is technical work in operating a Polygraph.

An employee is this class operates a Polygraph which records physiological disturbances accompanying fear while the subject is being interrogated. The operator must exercise considerable skill in interrogating persons undergoing examinations, noting changes in blood pressure, pulse, respiration, or electrodermal response. The employee works with considerable independence in preparing his interrogations. Work is performed under the administrative supervision of the police investigation supervisor who reviews reports of examinations and reviews work for results obtained.

ILLUSTRATIVE TASKS

Reviews suspect's case with investigators to determine pertinent information to question about during examination; attaches indicators to specific areas of the body of suspects such as palms, arm, and chest; interrogates suspect following a prearranged plan of questioning.

Analyzes and interprets reactions to questions recorded on tracing paper; prepares report on each subject examined.

Testifies in court pertaining to the results of Polygraph examinations given.

Performs related work as required.

KNOWLEDGES, ABILITIES AND SKILLS

Considerable knowledge of the operation, adjustment, and care of a Polygraph.

Considerable knowledge of the practices and procedures of analyzing and interpreting Polygraph charts.

Considerable knowledge of the methods of procedures used in criminal investigation and interrogation.

Some knowledge of court procedures in criminal trials.

Ability to prepare accurate and complete reports of information obtained through Polygraph examination.

Ability to obtain information through interviews, interrogation, and observation of suspects undergoing Polygraph examination.

Ability to express one's self clearly and concisely, orally and in writing.

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