Towards Expectation Detection in Language: A Case Study on Treatment Expectations in Reddit

Aswathy Velutharambath, Amelie Wührl


Abstract
Patients’ expectations towards their treatment have a substantial effect on the treatments’ success. While primarily studied in clinical settings, online patient platforms like medical subreddits may hold complementary insights: treatment expectations that patients feel unnecessary or uncomfortable to share elsewhere. Despite this, no studies examine what type of expectations users discuss online and how they express them. Presumably this is because expectations have not been studied in natural language processing (NLP) before. Therefore, we introduce the task of Expectation Detection, arguing that expectations are relevant for many applications, including opinion mining and product design. Subsequently, we present a case study for the medical domain, where expectations are particularly crucial to extract. We contribute RedHOTExpect, a corpus of Reddit posts (4.5K posts) to study expectations in this context. We use a large language model (LLM) to silver-label the data and validate its quality manually (label accuracy ~78%). Based on this, we analyze which linguistic patterns characterize expectations and explore what patients expect and why. We find that optimism and proactive framing are more pronounced in posts about physical or treatment-related illnesses compared to mental-health contexts, and that in our dataset, patients mostly discuss benefits rather than negative outcomes. The RedHOTExpect corpus can be obtained from https://www.ims.uni-stuttgart.de/data/RedHOTExpect
Anthology ID:
2026.lrec-main.872
Volume:
Proceedings of the Fifteenth Language Resources and Evaluation Conference
Month:
May
Year:
2026
Address:
Palma de Mallorca, Spain
Editors:
Stelios Piperidis, Núria Bel, Henk van den Heuvel, Nancy Ide, Simon Krek, Antonio Toral
Venue:
LREC
SIG:
Publisher:
ELRA Language Resource Association
Note:
Pages:
11172–11187
Language:
URL:
https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.872/
DOI:
Bibkey:
Cite (ACL):
Aswathy Velutharambath and Amelie Wührl. 2026. Towards Expectation Detection in Language: A Case Study on Treatment Expectations in Reddit. International Conference on Language Resources and Evaluation, main:11172–11187.
Cite (Informal):
Towards Expectation Detection in Language: A Case Study on Treatment Expectations in Reddit (Velutharambath & Wührl, LREC 2026)
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PDF:
https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.872.pdf