The aim of this paper is to investigate the usefulness of examples that show typical learner errors in online pedagogical dictionaries of English for the accuracy of error correction as well as immediate and delayed retention of usage. The optimal positioning of examples of errors in entries is also researched. In an online experiment, participants did a sentence correction exercise with the help of purpose-built monolingual dictionary entries, where the provision and positioning of examples showing errors were controlled. Two test versions were created, which differed only in the presence of examples of errors in the entries. Usage retention was observed immediately after the test and two weeks later. The results indicate that it is worthwhile to include examples of errors in online learners’ dictionaries because they contribute greatly to the retention of usage in the long run. They also help to rectify errors, though the effect is not statistically significant. The positioning of examples showing errors in entries has no influence on error correction accuracy or usage retention. The study reveals examples of errors to be a valuable induction-oriented stand-alone dictionary component placed outside warning boxes, which typically include explicit grammar rules and promote deduction.

本文的目的是调查在线英语教学词典中显示典型学习者错误的示例对于纠错准确性以及立即和延迟保留用法的有用性。还研究了条目中错误示例的最佳定位。在一项在线实验中，参与者在专门构建的单语词典条目的帮助下进行了句子纠正练习，其中显示错误的示例的提供和位置受到控制。创建了两个测试版本，其区别仅在于条目中存在错误示例。测试后立即和两周后观察使用保留情况。结果表明，在线学习者词典中包含错误示例是值得的，因为从长远来看，它们对保留使用情况有很大贡献。它们还有助于纠正错误，尽管效果在统计上并不显着。显示条目中错误的示例的位置对纠错准确性或使用保留没有影响。该研究揭示了错误的例子，这是一个有价值的面向归纳的独立词典组件，放置在警告框之外，通常包括明确的语法规则并促进演绎。