硬幣系統直徑大小可辨性之評估研究

隨著科技的快速發展，塑膠貨幣已儼然成為日常交易的新工具，然而硬幣的使用仍是世界各國日常交易行為的一種重要工具。我國現行的流通硬幣共有七種，分別為五角、一元、五元、十元、二十元、舊版五十元、新版五十元。然而，由於設計時欠缺人因和整體的考慮，而使其在可辨性上效果不佳，容易混淆並造成使用者的不便和損失。會影響貨幣可辨性之因素很多，但有關直徑大小方面的研究相當缺乏，也因此本研究擬針對直徑大小差異閾予以調查並評估現有硬幣系統的可辨性，俾作為日後硬幣設計的參考。本研究之差異閾值係採定值刺激法，共有30位受試者參與（男女各半）, 以隨機化決定實驗次序，標準刺激為23mm，比較刺激為18~28mm，每個受試者要進行100次實驗作業。結果發現：(1)直徑大小之差異閩為0.918mm；韋伯常數為0.04；(2)男女間對於直徑大小之可辨性無顯著差異；(3)進一步評估後發現，現行硬幣以二十元硬幣與十元硬幣的大小可辨性較差，容易造成視覺混淆。

關鍵字

硬幣設計；差異閾；硬幣大小

並列摘要

Due to the rapid growth and development of technology, the plastic cash has been a new exchange tool. However, the tradition coin is still a popular exchange tool, This study used the psychophysical method of constants stimuli to determine the difference threshold and Weber Fraction of diameter size of NT coins. A total of 30 college students (15 males, 15 females) participated in the laboratory experiment. A standard diameter size (23mm) and eight comparison diameter sizes (18, 19, 20, 21, 22, 24, 25, 26, 27, 28mm) of coins were used. A constant Weber Fraction of about 0.04 and a mean difference threshold of about 0.918mm at diameter size of 23mm were found. The effect of gender on the size discriminability was not significant. Furthermore, the diameter size discriminability of NT$20 was confused easily with NT$10. The information obtained in this study will help in improving the design of NT coins.

並列關鍵字

coin design ； diameter size discriminability ； differential threshold ； weber Fraction

參考文獻

Bruce, V.,Hellawell, D.(1988).Changing the Change: An Evaluation of Different Options for Smaller UK Coins.Ergonomics.31

Google Scholar

Bruce, V.,Howarth, C. I.,Clark-Carter, D.,Dodds, A. G.,Heyes, A. D.(1983).All Change for the Pound: Human Performance Tests with Different Versions of the Proposed UK One Pound Coin.Ergonomics.26(3)