Detection and Elimination of Systematic Labeling Bias in Code Reviewer Recommendation Systems
| Autor: | Hamdi Dibeklioglu, K. Ayberk Tecimer, Eray Tuzun, Hakan Erdogmus |
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| Přispěvatelé: | Tüzün, Eray, Dibeklioğlu, Hamdi |
| Rok vydání: | 2021 |
| Předmět: |
Code review
Information retrieval Labeling bias elimination Computer science Decision tree Code review recommendation 020207 software engineering Context (language use) Ground truth 02 engineering and technology Debiasing Recommender system computer.software_genre Systematic labeling bias Data cleaning Naive Bayes classifier 020204 information systems Modern code review 0202 electrical engineering electronic engineering information engineering Code (cryptography) Mean reciprocal rank computer |
| Zdroj: | EASE EASE 2021: Evaluation and Assessment in Software Engineering |
| Popis: | Conference Name: EASE 2021: Evaluation and Assessment in Software Engineering Date of Conference: June 2021 Reviewer selection in modern code review is crucial for effective code reviews. Several techniques exist for recommending reviewers appropriate for a given pull request (PR). Most code reviewer recommendation techniques in the literature build and evaluate their models based on datasets collected from real projects using open-source or industrial practices. The techniques invariably presume that these datasets reliably represent the “ground truth.” In the context of a classification problem, ground truth refers to the objectively correct labels of a class used to build models from a dataset or evaluate a model’s performance. In a project dataset used to build a code reviewer recommendation system, the recommended code reviewer picked for a PR is usually assumed to be the best code reviewer for that PR. However, in practice, the recommended code reviewer may not be the best possible code reviewer, or even a qualified one. Recent code reviewer recommendation studies suggest that the datasets used tend to suffer from systematic labeling bias, making the ground truth unreliable. Therefore, models and recommendation systems built on such datasets may perform poorly in real practice. In this study, we introduce a novel approach to automatically detect and eliminate systematic labeling bias in code reviewer recommendation systems. The bias that we remove results from selecting reviewers that do not ensure a permanently successful fix for a bug-related PR. To demonstrate the effectiveness of our approach, we evaluated it on two open-source project datasets —HIVE and QT Creator— and with five code reviewer recommendation techniques —Profile-Based, RSTrace, Naive Bayes, k-NN, and Decision Tree. Our debiasing approach appears promising since it improved the Mean Reciprocal Rank (MRR) of the evaluated techniques up to 26% in the datasets used. |
| Databáze: | OpenAIRE |
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