Text Advantages:
-clear to understand
-lots of detial
Disadvantages:
-need to be able to read it
-need to understand the language
-can be confusing- level of language
-lots of text cannot be read quickly-road signs
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Graphics:
Advantages:
-Multilingual-don’t need language to understand an image
-can match what you see-physical shapes
Disadvantages:
-can be confusing if you don’t know the symbols
-some symbols don’t mean the same thing in each countries
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Sound:
Advantages:
-No fixed position
-No line of sight required
-Good for visually impaired people
Disadvantages:
-No good in large areas- distortion of sound
-Usually language based- e.g. different alarms have different sounds
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