Scores of both questionnaires of both groups.
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For Question 9–13, 1 mark for each correct answer, 0 for don't know, −1 if it is wrong or any wrong answer if chose more than 1. (−6 to 6); For question 14, 1 for each correct answer, 0 for don't know, −1 for each wrong answer (−7 to 3); Range of total score of the whole questionnaire: −13 to 9.
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2015-12-02
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