human interaction with the system Flashcards
what does accessibility refer to
the potential of a service/product/device to meet the needs of as many individuals as possible
what can a system characterized by high accessibility meet
the needs of many people
what can a system characterized by low accessibility present
barriers to specific groups of people
what does usability refer to
potential of a product/application/website to accomplish user goals
what is ergonomics/human engineering
design of safe and comfortable products / systems for people
what is an example of ergonomics
keyboards make using a computer comfortable for us
what are the 8 quality components of usability
- complexity / simplicity
- effectiveness
- efficiency
- error
- learnability
- memorability
- readability / comprehensibility
- satisfaction
what is complexity / simplicity
amount of effort to find a solution / get a result
what is effectiveness
comparison of user performance against a predefined level
what is efficiency
task completion time after initial adjusting period
what is error
number of errors, type of errors, time needed to recover from the errors
what is learnability
time used to accomplish tasks on the first use
what is memorability
time, number of clicks, pages, steps used by users when they return to the device after a period of not using it
what is readability
reading speed
what is satisfaction
attitude of users toward applications after using them
what are some usability problems in GPS
small screen
outdated street data
inaccurate geographical data
low quality speaker
inefficient routing software
what are some usability problems in tablets
accidental touches lead to undesired selections
difficult to use control features
small side buttons
what are some usability problems in game consoles
small screen
buttons too small
short battery life
what are some usability problems in PCs
excessive use of large, bright screen can cause eyesight problems
mouse of a PC is designed for right-handed people
what are some usability problems in digital cameras
buttons too small to push
some cameras require specific software to connect them to a computer
some cameras don’t come with flash capability so users may need to buy an external flash device hardware
what are some usability problems with mobile phones
keyboard size is too small - people with bad eyesight can struggle
some users don’t really need all the features given - only need call access, SMS
what are some usability problems with MP3 devices
tiny buttons - hard to push
insufficient memory
fragile
what is an input device that can help with visual impairments
braille input devices
what is an output method/device that can help with visual impairments
speech output devices to read out text
capability to adjust color of display for those who are colorblind
