| 摘要 |
A method of conducting a survey on a portable device includes obtaining registration information and determining one of at least: (i) a GPS location, (ii) time at the GPS location, (iii) duration at the GPS location; (iii) or frequency at the GPS location. The method further includes invoking a survey on the portable device in response to a trigger, wherein the trigger is in response to the determining one of at least: (i) the GPS location, (ii) time at the GPS location, (iii) duration at the GPS location; (iii) or frequency at the GPS location, and providing an incentive to participate in the survey. |
