Flashcards
FlashCard Chapter 11
Cards in this deck (19)
- 1Perceptual Errors-Display of objects that are visually similar
-Invisible or poorly expressed states
-Failure to capture user’s attention
-Lack of perceivable feedback - 2Cognitive Errors-Tax recall memory
-Poor mnemonic aids
-Inconsistency
-Lack of context or status information
-Mental calculations and translations - 3Motor Errors-Awkward movements
-Highly similar motor sequences
-Pressure for speed
-Require a high degree of hand-eye coordination
-Requiring special types of motor skills (type) - 4SlipsAutomatic (subconscious) error that occurs without deliberation
- 5Capture errorContinue frequently done activity instead of intended one
- 6Description errorIntended action has much in common with others possible (usually when distracted)
- 7Data driven errorTriggered by arrival of sensory information which intrudes into normal action
- 8Associative activationInternal thoughts and associations trigger action
- 9Loss of activationForgetting goal in middle of sequence of actions
- 10Mode errorsDo action in one mode thinking you’re in another
- 11Error Prevention Guidelines-Eliminate modes or provide visible cues for modes
-Use good coding techniques
-Maximize recognition, minimize recall
-Design non-similar motor sequences or commands
-Minimize need for typing
-Test and monitor for errors and engineer them out
-Allow reconsideration of action by user
-Provide appropriate type of feedback
-Warn user an unusual situation is occurring
-Nothing - Just don’t do anything - 12Error Recovery Guidelines-Responses
-Query one
-Provide undo function
-Provide cancel function from lengthy operations in progress
-Require confirmation for drastic, destructive commands
-Provide reasonableness checks on input data
-Return cursor to error field, allow fix
-Provide some intelligence
-Provide quick access to context-sensitive help - 13Error Message Wording - VocabularyProblem with previous example - some users will not know what defragmentation means!!
- 14Error Message Wording - Tone-Sorry, command not recognized
-Command not recognized :-(
-Command not recognized
-Command not recognized!! - 15DialogDialog is the structure of the conversation between user and the computer system.
- 16Dialog Design NotationUsed for describing human-computer dialogs.
- 17GrammarsTo describe the dialog notation
- 18Production Rules-General form : if condition then action
-Can also allow mix notation involve events and state - 19CSP and event algebras-CSP (Communicating Sequential Processes)
-Able to specify concurrency and sequential dialogues.
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- Computer Science Flashcards on FlashCard Chapter 11, created by ITS544 (ROYFARAHLOKI) on 26/04/2017.
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- ITS544 (ROYFARAHLOKI)
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