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Background: Lip prints are unique patterns that are formed by the ridges and grooves on the lips, and they have been used as a potential tool for personal identification. The association between lip prints and personality patterns was first proposed by a Japanese researcher, Satoru Suzuki, in the 1970s. Suzuki suggested that there may be a correlation between the patterns of lip prints and certain personality traits. The present study aimed to investigate the association between lip print patterns using Suzuki and Tsuchihashi classification and personality traits measured by the esyncks questionnaire.
Methods: A total of 940 participants were recruited for this study. Lip print patterns were analyzed using the Suzuki and Tsuchihashi classification, and personality traits were assessed using the esyncks questionnaire. Statistical analysis was performed to evaluate the association between lip print patterns and personality traits.
Results: The results of this study showed a significant association between lip print patterns and personality traits. Specifically, individuals with a Type III lip print pattern were found to have higher scores on the Neuroticism dimension of personality, while those with a Type I lip print pattern had higher scores on the Conscientiousness dimension. Furthermore, individuals with a Type II lip print pattern had higher scores on the Extraversion dimension.
Conclusion: The findings of this study suggest that there is a significant association between lip print patterns and personality traits measured by the esyncks questionnaire. This association may have implications for forensic investigations and may be useful in identifying personality traits of individuals based on their lip print patterns.