João M. Santos

schoolLisbon University Institutebar_chart#8042 Global Rank

Total Papers

HCI Rank

#8042

Research Areas

Years Active

Recent Publications

When Personas Talk to You: Evaluating the Evolution of User Personas from Static Profiles to Conversational User Interfaces

The development of persona systems provides a possibility for end users to interact with different persona modalities. In a 54-participant randomized controlled experiment, we compare two persona interaction modalities, document and dialogue personas, both generated using AI approaches from survey data. Overall, dialo…

CHI '213rd AuthorEye Tracking & Gaze Interaction +1

Picturing It!: The Effect of Image Styles on User Perceptions of Personas

Though photographs of real people are typically used to portray personas, there is little research into the potential advantages or disadvantages of using such images, relative to other image styles. We conducted an experiment with 149 participants, testing the effects of six different image styles on user perceptions…

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