The Study of Pulse Rates Affecting The Quality of Handwriting

Abstract

This research aims 1) to study the effect of pulse rates on handwriting quality and 2) to compare the handwriting of people with different pulse rates through comparison of the handwriting of those with normal pulse rates (60 – 100 times/minute) and those with higher pulse rates (120-140 times/minute). The sample group in this study consists of 30 students from Suan Sunandha Rajabhat University, aged between 20-25 years old. The samples have normal health and mental state with no chronic diseases. Their blood pressure and pulse rates are recorded. This experimental study is conducted by having the samples write specified messages three times using rollerball pens, then, increasing their pulse rates to 120-140 times/minute through biking of electric bicycles, after that, having them write the messages again three times. The quality of handwriting is then analyzed using the CorelDraw Graphics Suite X7 program reviewing 5 of its aspects which include thin letter, normal letter, large letter, letter spacing, gap, and handwriting level. Next, the results are compared and processed through statistical analysis with relevant computer programs. Through comparative analysis by Independent-Samples T-Test, the study finds out that the writing traits in the gap and the level are different (statistical significance at 0.05), while the writing traits in the sizes of letters (thin, normal, and large) and the spacing of letters are not different (statistical significance at 0.05). As a result, it is revealed that the handwriting quality of people with different pulse rates show difference in the spacing and the leveling of letter. Therefore, it is suggested that forensic science officials responsible should pay attention to the weight of handwriting and the height and the bending of letters when observing writing traits in forensic document examination.