Improving controllability and predictability of interactive search interfaces

Lecturer : 
Antti Kangasrääsiö
Event type: 
HIIT seminar
Doctoral dissertation
Event time: 
2015-06-01 13:15 to 14:00
Lecture hall T2,Computer Science building, Konemiehentie 2, 02150, Espoo



In exploratory search, when a user directs a search engine using uncertain relevance feedback, usability problems regarding controllability and predictability may arise. One problem is that the user is often modelled as a passive source of relevance information, instead of an active entity trying to steer the system based on evolving information needs. This may cause the user to feel that the response of the system is inconsistent with her steering. Another problem arises due to the sheer size and complexity of the information space, and hence of the system, as it may be difficult for the user to anticipate the consequences of her actions in this complex environment. These problems can be mitigated by interpreting the user's actions as setting a goal for an optimization problem regarding the system state, instead of passive relevance feedback, and by allowing the user to see the predicted effects of an action before committing to it.

In this talk, an implementation of these improvements in a visual user-controllable search interface is demonstrated. Also, results from a related user study are presented, showing indication of improvements in task performance, usability, perceived usefulness and user acceptance.

(This is a longer version of a seminar talk given at IUI'2015 and will take approximately 20 minutes. Publication:


Antti Kangasrääsiö is a researcher at Aalto University and HIIT, currently working on interactive user modelling in online search.

Last updated on 18 May 2015 by Yi Chen - Page created on 18 May 2015 by Yi Chen