human interaction with the system

Question 1

what does accessibility refer to

Answer 1

the potential of a service/product/device to meet the needs of as many individuals as possible

Question 2

what can a system characterized by high accessibility meet

Answer 2

the needs of many people

Question 3

what can a system characterized by low accessibility present

Answer 3

barriers to specific groups of people

Question 4

what does usability refer to

Answer 4

potential of a product/application/website to accomplish user goals

Question 5

what is ergonomics/human engineering

Answer 5

design of safe and comfortable products / systems for people

Question 6

what is an example of ergonomics

Answer 6

keyboards make using a computer comfortable for us

Question 7

what are the 8 quality components of usability

Answer 7

• complexity / simplicity
• effectiveness
• efficiency
• error
• learnability
• memorability
• readability / comprehensibility
• satisfaction

Question 8

what is complexity / simplicity

Answer 8

amount of effort to find a solution / get a result

Question 9

what is effectiveness

Answer 9

comparison of user performance against a predefined level

Question 10

what is efficiency

Answer 10

task completion time after initial adjusting period

Question 11

what is error

Answer 11

number of errors, type of errors, time needed to recover from the errors

Question 12

what is learnability

Answer 12

time used to accomplish tasks on the first use

Question 13

what is memorability

Answer 13

time, number of clicks, pages, steps used by users when they return to the device after a period of not using it

Question 14

what is readability

Answer 14

reading speed

Question 15

what is satisfaction

Answer 15

attitude of users toward applications after using them

Question 16

what are some usability problems in GPS

Answer 16

small screen
outdated street data
inaccurate geographical data
low quality speaker
inefficient routing software

Question 17

what are some usability problems in tablets

Answer 17

accidental touches lead to undesired selections
difficult to use control features
small side buttons

Question 18

what are some usability problems in game consoles

Answer 18

small screen
buttons too small
short battery life

Question 19

what are some usability problems in PCs

Answer 19

excessive use of large, bright screen can cause eyesight problems
mouse of a PC is designed for right-handed people

Question 20

what are some usability problems in digital cameras

Answer 20

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

Question 21

what are some usability problems with mobile phones

Answer 21

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

Question 22

what are some usability problems with MP3 devices

Answer 22

tiny buttons - hard to push
insufficient memory
fragile

Question 23

what is an input device that can help with visual impairments

Answer 23

braille input devices

Question 24

what is an output method/device that can help with visual impairments

Answer 24

speech output devices to read out text
capability to adjust color of display for those who are colorblind

Question 25

what are some output devices that can help with hearing/speech impairments

Answer 25

subtitles for them to read out text
speech can be converted to visual effects

Question 26

what are input/output devices to help with learning disabilities

Answer 26

special device that helps with active participation, multi space experience

Question 27

what are some input devices to help with limited hand mobility

Answer 27

use of pointing devices to control the computer
left/right-handed keyboards for those who have lost one arm
expanded keyboard with larger keys
voice recognition, natural language processing