Question

How is the behavior of a help system different from that of an escape mechanism in a dialog?

a.

Help systems allow users to undo actions, while escape mechanisms provide assistance.

b.

Help systems return users to the main menu, while escape mechanisms provide contextual assistance.

c.

Help systems interrupt ongoing actions and return users to their original state, while escape mechanisms cancel actions and return users to a higher-level state.

d.

Help systems are only used in hierarchical STNs, while escape mechanisms work in linear STNs.

Posted under Human Computer Interaction

Answer: (c).Help systems interrupt ongoing actions and return users to their original state, while escape mechanisms cancel actions and return users to a higher-level state. Explanation:The behavior of a help system is different from that of an escape mechanism in a dialog. Help systems interrupt ongoing actions and provide assistance, allowing users to return to their original state once they finish using the help. On the other hand, escape mechanisms cancel ongoing actions and return users to a higher-level state, such as the main menu, to start over or select a different action.

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