Lecture 10: UX UI and Lecture 11: User Studies

UX

User experience, which focuses on how something works and how people interact with it

UI

User interface, which focuses on the look and the layout

Operational definition

A clear, measurable definition of the variable

AB Testing

An experiment where two or more variants of a page are shown to users at random, and statistical analysis is used to determine which variation performs better for a given conversion

Between-subjects (AB Testing)

Participants assigned to 2 different conditions (experimental and control)

Within-subjects (AB Testing)

All participants in both conditions (Experimental AND Control)

Counterbalancing

Between-subjects (AB+)

Participants assigned to one of >2 conditions

Within-subjects (AB+)

Participants assigned to all levels (>2)

Between-subjects (Factorial Design)

Participants are assigned to one level of each factor

Within-subjects (Factorial Design)

Participants assigned to all levels of all factors

Mixed-design

Participants assigned to different groups (between-subjects), participants also test multiple times (within-subjects

Interactions

The way users interact with a system or device