Reducing Misinformation in Query Autocompletions
Djoerd Hiemstra <>

Open Search is a BIG deal!

... technically not THAT big a deal.

1. To improve the service

2. Targeted advertisements

Lawsuits over autocompletions

Autocompletion Stereotypes

Harmful Autocompletions

Experiment design


  1. Autocompletions from web content:
    anchor texts from the ClueWeb09 web crawl
    by Callan and Hoy (2009)
  2. Autocompletions from user data:
    query log by Pass et al. (2006)


Experimental results


Open Search Outlook