ChatGPT’s Linguistic Limitations Prompt Demand for Advanced Research

by | Nov 5, 2023

A recent study on ChatGPT, a well-known language model, has revealed its morphological skills and raised questions about its claim of having human-like language proficiency. These findings highlight the need for language models with better morphology and the necessity for further research in this area.

To investigate ChatGPT’s morphological abilities, researchers conducted a thorough evaluation in different languages, including English, German, Tamil, and Turkish. While the model performed almost as well as humans in German, it fell short in English compared to specialized systems designed for morphological tasks.

The study exposes the weaknesses in ChatGPT’s morphological abilities, disproving its claim of human-like language proficiency. The model often generated unrealistic word forms, possibly due to a preference for real words. This emphasizes the need for purpose-built systems with improved morphological capabilities, especially in English, to address these shortcomings.

To assess ChatGPT’s morphological skills, researchers used the widely-used Wug test, a method that involves generating new words that the model hasn’t seen before. By comparing the model’s results to supervised baselines and human annotations, researchers measured accuracy to evaluate its performance.

The evaluation considered morphological variations among speakers, providing a comprehensive understanding of ChatGPT’s abilities. However, the study also revealed the model’s bias towards real-world usage, highlighting the importance of considering morphology when evaluating language models. Neglecting this aspect can lead to skewed results and limit the linguistic capabilities of large language models.

The study found that the value of “k,” representing the number of top-ranked responses considered, significantly affected the performance gap between ChatGPT and specialized systems. As the value of “k” increased, the gap widened, further emphasizing ChatGPT’s limitations in morphological tasks compared to purpose-built models.

While previous research on large language models has mainly focused on syntax and meaning, this study emphasizes the importance of investigating their morphological abilities. Existing literature often fails to consider the full range of linguistic phenomena, hindering our understanding of the potential of large language models compared to human language skills.

In conclusion, this detailed analysis of ChatGPT’s morphological abilities in multiple languages has revealed its limitations and calls for further research. The findings challenge ChatGPT’s claim of human-like language proficiency and stress the importance of considering morphology when evaluating language models. As large language models continue to advance, it is crucial to address these limitations and enhance their morphological capabilities for more accurate and human-like language generation.