What can't I do with the device?

Can't see the device well

Why can't I do it?

• too dark,
• too small,
• left glasses at home,
• low vision

Solutions

Either:

• Use voice output
• Or, change the display settings
• And / or, allow speech input

What can't I do with the device?

Can't see the device at all

Why can't I do it?

• eyes on the road,
• eyes occupied elsewhere,
• too dark,
• blindness

Solutions

Either:

• Use voice output
• And / or, allow speech input

What can't I do with the device?

Can't locate buttons on the device (can't see where they are)

Why can't I do it?

• eyes on the road,
• eyes occupied elsewhere,
• too dark,
• blindness

Solutions

Either:

• Use a list mode, requiring only 3 commands
• Or, enable users to confirm their selections

What can't I do with the device?

Can't read the device well

Why can't I do it?

• unfamiliar language,
• dyslexic,
• poor cognitive abilities

Solutions

Either:

• Use voice output
• Or, change the display settings

What can't I do with the device?

Can't read the device at all

Why can't I do it?

• unfamiliar language,
• poor cognitive abilities

Solutions

Use voice output

What can't I do with the device?

Can't hear the device well

Why can't I do it?

• in a noisy office,
• in a noisy bar, tinitus,
• hard-of-hearing,
• deaf

Solutions

Either:

• Show sounds visually
• Or, change the sound settings
• Or, use assistive listening systems

What can't I do with the device?

Can't hear the device at all

Why can't I do it?

• in a noisy bar, tinitus, deaf

Solutions

Show sounds visually

What can't I do with the device?

Can't hear the device well and Can't see the device well

Why can't I do it?

• left glasses at home and hearing aid batteries just ran out,
• deaf-blind

Solutions

Either:

• Use voice output and change the sound settings
• Or, enlarge text on the display and change the sounds settings
• Or, change the sounds settings and change the display settings
• Or, use remote control with a tactile display (e.g. Braille)

What can't I do with the device?

Can't reliably press only one button at a time on the device

Why can't I do it?

• gloves,
• bandages,
• poor muscle control

Solutions

Either:

• Enable users to confirm their selections
• Or, use voice output

What can't I do with the device?

Can't touch the device / Can't reach the device

Why can't I do it?

• too far away,
• too high,
• too low,
• too much to stick on one desk,
• poor reach capabilities

Solutions

Either:

• Use remote control it
• Or, allow speech input

What can't I do with the device?

Can only use one or two buttons on the device

Why can't I do it?

• muscles only allow limited movement,
• can't move below the neck

Solutions

Either:

• Allow scanning input
• Or, allow speech input

What can't I do with the device?

Can't talk to the device

Why can't I do it?

• chewing,
• back from dentist,
• in a noisy bar,
• strong accent or dialect,
• unable to speak,
• poor speech.

Solutions

Allow an alternative to speech input

What can't I do with the device?

Can't understand the device

Why can't I do it?

• unfamiliar accent,
• unfamiliar dialect,
• unfamiliar topic / level of detail,
• poor cognitive abilities

Solutions

Either:

• Change the settings for voice output
• Or, change the settings for the display
• Or, use a simplified remote control

What can't I do with the device?

Can't understand the language

Why can't I do it?

• On vacation or business in a foreign country

Solutions

Or, change the language

Return to Needs Document