Understanding Confounding Effects in Linguistic Coordination: An Information-Theoretic Approach.

Area of Science:

• Computational Linguistics
• Psycholinguistics
• Information Theory

Background:

• Stylistic coordination, or accommodation, in dialogues is frequently studied.
• Previous research often reports significant evidence of stylistic accommodation.
• Potential confounding factors in measuring coordination are not always adequately addressed.

Purpose of the Study:

• To propose an information-theoretic approach for measuring stylistic coordination in dialogues.
• To identify and quantify confounding factors, particularly utterance length, in observed stylistic coordination.
• To develop methods for distinguishing genuine turn-by-turn coordination from spurious correlations.

Main Methods:

• Development of an information-theoretic measure for dialogue stylistic coordination.
• Application of conditioning to account for confounding variables.
• Analysis of previous studies to identify the impact of length coordination.
• Proposal of statistical tests to differentiate contextual length effects from turn-by-turn coordination.

Main Results:

• A significant portion of previously reported stylistic coordination can be attributed to utterance length coordination.
• Longer utterances tend to be followed by longer responses, creating spurious correlations.
• A method is proposed to distinguish length correlations arising from context versus turn-by-turn dynamics.
• Tests are suggested to determine if stylistic coordination remains after controlling for length and context.

Conclusions:

• Utterance length is a critical confounding factor in measuring stylistic coordination in dialogues.
• The proposed information-theoretic approach provides a more accurate measure of stylistic accommodation.
• Further investigation is needed to isolate genuine stylistic coordination from other conversational dynamics.