Articles by Titti Kallio

Titti Kallio (M.A. in psychology) is working as Director of Design and Usability for TeliaSonera. She has 20 years of experience in the usability field.

Usability Testing of Mobile Applications: A Comparison between Laboratory and Field Testing

Abstract Usability testing a mobile application in the laboratory seems to be sufficient when studying user interface and navigation issues. The usability of a consumer application was tested in two environments: in a laboratory and in a field with a total of 40 test users. The same problems were found in both environments, differences occurred […] [Read More]