This study aims to figure out precursory linguistic characteristics prior to incident-related lie in deceptive statements to detect deceptions faster. Each(True group, Deceptive group) participants read an instruction, went to a laboratory, checked o...
This study aims to figure out precursory linguistic characteristics prior to incident-related lie in deceptive statements to detect deceptions faster. Each(True group, Deceptive group) participants read an instruction, went to a laboratory, checked out their group, received an mixed ordered-envelope and arranged documents. Deception group was supposed to pick and tear 'draft of stamp' in the document, and to lie about the draft. Interview was performed by structured questionnaire. There were five incident-related and five incident-unrelated questions in both the true and deceptive group. But there was one more incident-related question in deceptive group interview.
To avoid Brokaw's danger and Othello's error, the answers to incident-unrelated questions(1-4 questions) were considered as base line. Average frequency of base line was measured dividing all linguistic characteristics in total sentences by the number of total sentences(1-4 questions). The main statements prior to statements about 'draft of stamp' were major data. Average frequency of linguistic characteristics prior to lie in main(core-incident-related) statement was measured dividing all linguistic characteristics in total sentences by the number of total sentences(5-6 questions). Paired-Samples T-Test was conducted to compare the two groups.
Results are following. First, In true group, frequency of a slip of the tongue and frequency of hesitation time was more than base line. Second, in deceptive group, slip of the tongue, hesitation time, frequency of hesitation, stuttering, word changes such as appellation, repetition of the same word and unnecessary phrase were more than base line. In conclusion, precursory linguistic characteristics prior to lie in deceptive statements were 'long hesitation time', 'more stuttering', 'word changes such as appellation', 'repetition of the same word' and 'increase of unnecessary phrase'. And described the limits of this study and progressive direction for follow-up studies.