Users’ Perceived Difficulties and Corresponding Reformulation Strategies in Google Voice Search

Google Voice語音搜尋中使用者對困難的感受與檢索詞重構策略

語音搜尋（Voice search）為近年來行動裝置應用上的趨勢，透過使用者實驗與後測訪談，本研究旨在探討一般使用者利用Google Voice進行語音搜尋並遭遇困難時，所因應的檢索詞重構策略。本研究的結果揭示了：(1)受測者進行語音搜尋時，常遭遇的困難有語音辨識錯誤（speech recognition errors）以及主題複雜度（topic complexity）；(2)受測者面對容易辨識錯誤的字詞時（如縮寫字、單音節詞、外來語等），自然而然地發展出若干不同的因應策略；(3)受測者在面對辨識錯誤結果的情緒反應（emotional reactions）皆有不同，以及表達了其偏好的語音搜尋適用情境（usage occasions）。

In this article, we report users' perceptions of query input errors and query reformulation strategies in voice search using data collected through a laboratory user study. Our results reveal that: 1) users' perceived obstacles during a voice search can be related to speech recognition errors and topic complexity; 2) users naturally develop different strategies to deal with various types of words (e.g., acronyms, single-worded queries, non-English words) with high error rates in speech recognition; and 3) users can have various emotional reactions when encounter voice input errors and they develop preferred usage occasions for voice search.