PTE writing practice paragraphs-summarize written text
Read the passages below and summarize them using one sentence in not more than 75 words(30-35 words). Type your response in the comment section at the bottom of the screen. You have 10 minutes to finish each passage. Your response will be judged on the quality of your writing and on how well your response presents the key points in the passage.
1.
A new form of lie detector that works by voice analysis and which can be used without a subject’s knowledge has been introduced in Britain. The unit is already widely employed by the police and private industry in the US, and some of its applications there raise serious worries about its potential here. The Dektor psychological stress analyser (PSE) is used by private industry for pre-employment screening, investigating thefts, and even periodic staff checks. Although at least 600 of the devices are used in the US, there are apparently only three in Britain. Burns International Security Services showed its PSE at the International Fire and Security Exhibition in London last week. Philip Hicks, assistant manager of Burns’ Electron Division and the Burns official trained to use the PSE, said that one of the other two units was being employed by a private firm for pre-employment checks.
In addition to the normally understood voice generation mechanisms – vibrations of the vocal chords and resonance of cavities inside the head – there is a third component caused by vibration of the muscles inside the mouth and throat. Normally, but not under stress, these voluntary muscles vibrate at 8-12 Hz, and this adds a clearly noticeable frequency-modulated component to the voice. The PSE works by analysing this infrasonic FM component. Dektor claims that the muscle tightening occurs very quickly, and can change from one word to the next, so that it is possible to pick out a word or phrase that caused stress.
Dektor emphasises that the device shows only stress, not dishonesty. Three steps are suggested to overcome this difficulty. First, the subject is supposed to see a full list of the questions in advance. Second, there are ‘neutral’ questions and one to which the subject is specifically asked to lie. Third, if an individual shows stress on a vital question (such as Have you stolen more than £100 in the last six months?), then additional questions must be asked to ensure that this does not reflect an earlier theft or the subject’s knowledge of someone else responsible.
The standard report recommended by Dektor is simply the statement ‘After careful analysis, it is the opinion of this Examiner that the Subject’s chart did contain specific reaction, indicative of deception, to the relevant questions listed below.’ And Hicks admitted that if a person showed stress and Hicks was unable to ascertain just what caused the stress, he would assume that the stress was ‘indicative of deception’.
