為了能適用於大部分的心理學實驗，作者將Price（1979）之微電腦軟體計時程式加以改良，使之可以滿足下列條件：1.反應不一定只從鍵盤輸入，若程式需要，亦可指定任意I/O狀態的改變導致計時停止；2.計時極限可長達6小時。本文提出改良後之組合語言程式，說明設計邏輯，並舉例闡明程式之呼叫方法，所有程式皆以機器可讀的型式存於磁片，以供需要之研究者複製。

　　　　　The software timing program developed by Price (1979) was modified so as to extend it srange of applications. The modified version was also written in assembly language, and had the following advantages over Price's original one: (1) The input entry is acceptable not only from keyboard, but also from any I/O device with the corresponding byte address being pre-definedfrom the calling programs, (2) the maximum time length for timing can be extended to about 6 hours. The object code program and some other BASIC programs for testing it have beenstored on a diskette and are available for reproductions.