Found via Searchengineland a new paper from MSN Research.
” We [Edward Cutrell; Zhiwei Guan] describe a study that used eye tracking methodologies to explore the effects of changes in the
presentation of search results. We found that adding information to the contextual snippet significantly improved
performance for informational tasks but degraded performance for navigational tasks. We discuss possible
reasons for this difference and the design implications for the better presentation of search results.
