Midterm HCI reviewer

the area of work under study

e.g. graphic design

• domain

• goal

• task

• intention

what you want to achieve

e.g. create a solid red triangle

• domain

• goal

• task

• intention

how you go about doing it

ultimately in terms of operations or actions

e.g. ... select fill tool, click over triangle

• task

• domain

• intention

• goal

is a specific action required to meet the goal.

• goal

• intention

• task

• domain

user’s expectation of changed system state

≠ actual presentation of this state

• Gulf of Execution

• Gulf of Evaluation

___________

User’s formulation of actions

≠ actions allowed by the system

• Gulf of Evaluation

• Gulf of Execution

people don’t know what to do because they haven’t learned or been taught to use something properly

• SLIP

• MISTAKES

HUMAN ERRORS:

People do know what to do, in fact that may have successfully done this thing before many times, but they still make an error

• SLIP

• MISTAKES

direct manipulation– user interacts with artificial world

• Office interface

• Industrial interface

Study of the physical characteristics of interaction.

Also known as human factors.