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(i) Using KLM-GOMS, list out the necessary actions and identify the operators that will be used to calculate the time required to take a skilled user to change their preferred country using the interface shown in figure 1 Assume that the currently displayed country is the "United Kingdom", and the user needs to select "United States" from the country/region dropdown and choose "Español" from the language dropdown. Assume no scrolling is involved in either dropdown control. Clicking the "Go to site" button at the end will apply the change. (ii) Using your solution from (i), apply the rules for mental operations where applicable and use your final formula to make a prediction of the time it will take a skilled user to complete the task.

(i) Using KLM-GOMS, list out the necessary actions and identify the operators that will be used to calculate the time required to take a skilled user to change their preferred country using the interface shown in figure 1 Assume that the currently displayed country is the "United Kingdom", and the user needs to select "United States" from the country/region dropdown and choose "Español" from the language dropdown. Assume no scrolling is involved in either dropdown control. Clicking the "Go to site" button at the end will apply the change. (ii) Using your solution from (i), apply the rules for mental operations where applicable and use your final formula to make a prediction of the time it will take a skilled user to complete the task.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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(b) KLM-GOMS stands for Keystroke-Level Model for Goals, Operators, Methods, and Selection rules. It allows designers to predict how long it will take a skilled user to execute a specific set of actions using a particular interface design. The standard set of operators are: • Keying (K): for typing a key or clicking a control - 0.2s Pointing (P): pointing with a mouse to a target on a display - 1.1s • Homing (H): home hands on keyboard or other input device - 0.4s Mentally Preparing (M): think before doing an action - 1.35s Responding (R): time a user must wait for a response Once you determine the operators, you need to apply the following rules for mental operations before calculating the time. Rule 0: Add Ms in front of all Ks and all Ps that point to commands. Rule 1: Change PMK to PK to remove fully anticipated Ms. Rule 2: Eliminate any Ms in the middle of strings that are part of a cognitive unit (a contiguous sequence of typed characters). Rule 3: Delete Ms before consecutive terminators. Rule 4: Delete Ms that are terminators of commands. Rule 5: Delete overlapped Ms, i.e., overlaps an R (a delay).
Transcribed Image Text:(b) KLM-GOMS stands for Keystroke-Level Model for Goals, Operators, Methods, and Selection rules. It allows designers to predict how long it will take a skilled user to execute a specific set of actions using a particular interface design. The standard set of operators are: • Keying (K): for typing a key or clicking a control - 0.2s Pointing (P): pointing with a mouse to a target on a display - 1.1s • Homing (H): home hands on keyboard or other input device - 0.4s Mentally Preparing (M): think before doing an action - 1.35s Responding (R): time a user must wait for a response Once you determine the operators, you need to apply the following rules for mental operations before calculating the time. Rule 0: Add Ms in front of all Ks and all Ps that point to commands. Rule 1: Change PMK to PK to remove fully anticipated Ms. Rule 2: Eliminate any Ms in the middle of strings that are part of a cognitive unit (a contiguous sequence of typed characters). Rule 3: Delete Ms before consecutive terminators. Rule 4: Delete Ms that are terminators of commands. Rule 5: Delete overlapped Ms, i.e., overlaps an R (a delay).
(i) Using KLM-GOMS, list out the necessary actions and identify the operators that will be used to calculate the time required to take a skilled user to change their preferred country using the interface shown in figure 1 Assume that the currently displayed country is the "United Kingdom", and the user needs to select "United States" from the country/region dropdown and choose "Español" from the language dropdown. Assume no scrolling is involved in either dropdown control. Clicking the "Go to site" button at the end will apply the change. (ii) Using your solution from (i), apply the rules for mental operations where applicable and use your final formula to make a prediction of the time it will take a skilled user to complete the task.
Transcribed Image Text:(i) Using KLM-GOMS, list out the necessary actions and identify the operators that will be used to calculate the time required to take a skilled user to change their preferred country using the interface shown in figure 1 Assume that the currently displayed country is the "United Kingdom", and the user needs to select "United States" from the country/region dropdown and choose "Español" from the language dropdown. Assume no scrolling is involved in either dropdown control. Clicking the "Go to site" button at the end will apply the change. (ii) Using your solution from (i), apply the rules for mental operations where applicable and use your final formula to make a prediction of the time it will take a skilled user to complete the task.
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