September 2013
Intermediate to advanced
264 pages
5h
Chinese
Content preview from Bad Data 技術手冊
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設計資料
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這類負的 5 顆星評論可能也會傷害到企業的名聲。前幾句話可能是玩笑話，但這些也是
人最容易閱讀到的句子，而這則評論也是在說真的非常負面的事物，而不是以開玩笑的
方式。而也有一些人真的不應該撰寫評論：
我想要給 A。我不想要傷害任何人的感覺。A- 是我會給的最低分數。A- 就
是新的 F。
整則評論以及評分的重點就是在抒發自己的意見，而該評論者似乎也害怕這麼做。以下
是一則從 5 顆星而來的真正的負評論：
我的牛排煎的太老了。菜單選擇很少。
若以上的評論給予 1 或 2 顆星，那麼就很合理。但給予一個很少選擇的菜單以及太老的
牛排 5 顆星？我絕對不是唯一一個被混淆的人。
最後，只是要顯示我的情緒分類器並不是完美的。以下是一則實際上是正面的 5 顆星評
論，但評論者使用了負負得正的敘述方式，讓分類器給予它一個負面的情緒分類：
在這吃飯從來不會失望。
負負得正、如「not good」的否定詞、諷刺以及其他的語言俚語，通常都能夠讓情緒分
析系統混淆，而且這個領域也是正在進行的研究主題。因為這樣，我相信將這些評論移
除應該是最好的方式。若你想要一個乾淨的訊號，你通常必須要忽略少量的衝突資訊。
設計資料
我也會將情緒分類器用在其他地方。如我稍早提到的，我們顯示地點的評論，來提供使
用者額外的資訊。並且因為我們只想要顯示出最好的地點，我們顯示的那些評論應該要
能夠反應這件事情。這代表，我們顯示的每則評論都必須要擁有強烈的正向訊號。並
且，若評論中有評分存在，它也必須要是高的，因為我們不想要顯示任何令人混淆的高 ...
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