关键词:  , 卧姿笔迹；条件变化笔迹；笔迹检验；实验研究

Abstract: Objective To provide scientific basis for the identification of handwriting written in lying positions. Method One hundred and eight persons’ handwriting samples written in normal sitting position and supine, left lateral, right lateral and prone positions were collected. By comparing the similarities and differences of handwriting characteristics between four lying positions and normal sitting position, the features and changes of handwriting written in lying position were analyzed and summed up, and the possible reasons of changes were discussed as well. Results Characteristics such as the font style, writing method, wrong character, writing sequence, proportion between strokes and characters are relatively stable in handwritings written in lying positions, which can be regarded as essential handwriting features. Among four lying positions, the handwriting written in prone position is the most stable, and the handwriting written by person with high writing skill is also relatively stable. Conclusion To Make a scientific judgment ,prone position handwriting identification should be combined with the law of the change.

Key words: