Type and Complexity Signals in Multilingual Question Representations

• URL: http://arxiv.org/abs/2510.06304v1
• Date: Tue, 07 Oct 2025 17:50:05 GMT
• Title: Type and Complexity Signals in Multilingual Question Representations
• Authors: Robin Kokot, Wessel Poelman,
• Abstract summary: We introduce the Question Type and Complexity dataset with sentences across seven languages.<n>We compare layer-wise probes on frozen Glot500-m representations against subword TF-IDF baselines, and a fine-tuned model.<n>Results show that statistical features classify questions effectively in languages with explicit marking, while neural probes capture fine-grained structural complexity patterns better.
• Score: 0.27930955543692815
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This work investigates how a multilingual transformer model represents morphosyntactic properties of questions. We introduce the Question Type and Complexity (QTC) dataset with sentences across seven languages, annotated with type information and complexity metrics including dependency length, tree depth, and lexical density. Our evaluation extends probing methods to regression labels with selectivity controls to quantify gains in generalizability. We compare layer-wise probes on frozen Glot500-m (Imani et al., 2023) representations against subword TF-IDF baselines, and a fine-tuned model. Results show that statistical features classify questions effectively in languages with explicit marking, while neural probes capture fine-grained structural complexity patterns better. We use these results to evaluate when contextual representations outperform statistical baselines and whether parameter updates reduce the availability of pre-trained linguistic information.

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