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Polygraph examination, also known as a lie detector test, involves the measurement and recording of physiological responses to specific questions. During the examination, a polygraph examiner marks the chart to record the physiological responses. The chart markings are a crucial aspect of the examination, as they help the examiner interpret the physiological responses and determine whether the individual is telling the truth or lying. Here are the signs and symbols used in chart marking in a polygraph examination:
• Question Mark: The question mark symbol is used to indicate the beginning of a new question in the examination. When a new question is asked, the examiner makes a vertical mark on the chart to indicate the start of the question.
• Initial Peak: The initial peak is a sharp upward spike in the chart that occurs immediately after the question mark. This peak represents the physiological response to the initial question and is used as a baseline to compare other responses during the examination.
• Response Peak: A response peak is a sharp upward spike in the chart that occurs after the initial peak. This peak represents a physiological response to the question asked. The examiner marks the response peak with a vertical line and records the time and the question number.
• Plateau: A plateau is a horizontal line that appears on the chart after the response peak. This line represents a period of time during which the physiological response remains consistent.
• Falling Slope: A falling slope is a downward slope that appears on the chart after the plateau. This slope indicates a decrease in physiological response to the question.
• Recovery Slope: The recovery slope is a gradual upward slope that appears on the chart after the falling slope. This slope indicates a return to the baseline physiological response.
• Termination: The termination is a vertical line that appears on the chart after the recovery slope. This line marks the end of the question and indicates the start of a new question. In summary, the examiner uses different symbols and signs to record and interpret the physiological responses to the questions asked during a polygraph examination. These chart markings help the examiner determine the individual's truthfulness or deception.
• Question Mark: The question mark symbol is used to indicate the beginning of a new question in the examination. When a new question is asked, the examiner makes a vertical mark on the chart to indicate the start of the question.
• Initial Peak: The initial peak is a sharp upward spike in the chart that occurs immediately after the question mark. This peak represents the physiological response to the initial question and is used as a baseline to compare other responses during the examination.
• Response Peak: A response peak is a sharp upward spike in the chart that occurs after the initial peak. This peak represents a physiological response to the question asked. The examiner marks the response peak with a vertical line and records the time and the question number.
• Plateau: A plateau is a horizontal line that appears on the chart after the response peak. This line represents a period of time during which the physiological response remains consistent.
• Falling Slope: A falling slope is a downward slope that appears on the chart after the plateau. This slope indicates a decrease in physiological response to the question.
• Recovery Slope: The recovery slope is a gradual upward slope that appears on the chart after the falling slope. This slope indicates a return to the baseline physiological response.
• Termination: The termination is a vertical line that appears on the chart after the recovery slope. This line marks the end of the question and indicates the start of a new question. In summary, the examiner uses different symbols and signs to record and interpret the physiological responses to the questions asked during a polygraph examination. These chart markings help the examiner determine the individual's truthfulness or deception.