A Word Difficulty Classification Research Based on K-Means Method

Abstract

Wordle is a globally popular game and many researchers have conducted research on its game mechanics. However, few studies have explored the influence of attributes on the difficulty of the word. Therefore, this paper uses K-means algorithm to classify word difficulty based on certain word attributes. In the paper, the main attributes character repeat times, the presence of "th" or "er", the initial letter (s/c/a/t), and the final letter (e/y/r/t) that affect word difficulty are selected, and a comparison is made regarding the number of difficulty categories, and the most appropriate number of categories is three. Finally, it has been validated by Spearman that this method possesses strong reliability.