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Not All the Same: Understanding and Informing Similarity Estimation in Tile-Based Video Games

Published: 11 May 2024 Publication History

Abstract

Similarity estimation is essential for many game AI applications, from the procedural generation of distinct assets to automated exploration with game-playing agents. While similarity metrics often substitute human evaluation, their alignment with our judgement is unclear. Consequently, the result of their application can fail human expectations, leading to e.g. unappreciated content or unbelievable agent behaviour. We alleviate this gap through a multi-factorial study of two tile-based games in two representations, where participants (N=456) judged the similarity of level triplets. Based on this data, we construct domain-specific perceptual spaces, encoding similarity-relevant attributes. We compare 12 metrics to these spaces and evaluate their approximation quality through several quantitative lenses. Moreover, we conduct a qualitative labelling study to identify the features underlying the human similarity judgement in this popular genre. Our findings inform the selection of existing metrics and highlight requirements for the design of new similarity metrics benefiting game development and research.

Supplemental Material

MP4 File - Video Presentation
Video Presentation
CSV File - Study 1 Dataset
Study 1 survey (N=460) response data from Qualtrics, anonymised (CSV)
ZIP File - Study Material
Study 1

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      cover image ACM Conferences
      CHI '24: Proceedings of the CHI Conference on Human Factors in Computing Systems
      May 2024
      18961 pages
      ISBN:9798400703300
      DOI:10.1145/3613904
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      Published: 11 May 2024

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      1. Computer Vision
      2. Empirical Study
      3. Games/Play
      4. Quantitative Methods

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