What question did this study set out to answer?

The study aims to establish and evaluate the Keystroke-Level Model to quantitatively predict the time required by skilled users to complete routine tasks on interactive computer systems.

July 1, 1980Communications of the ACMOpen Access

The keystroke-level model for user performance time with interactive systems

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The study aims to establish and evaluate the Keystroke-Level Model to quantitatively predict the time required by skilled users to complete routine tasks on interactive computer systems.
Deconstructed human-computer interaction tasks into discrete physical and cognitive operations, including keystrokes, pointing, homing, drawing, and mental preparation.
Assigned empirical execution time values to individual operators based on observed expert performance across diverse interaction tasks.
The Keystroke-Level Model calculates total task duration by summing standard execution times assigned to physical movements and cognitive setup phases.
The predictive framework provides interface designers with a practical, low-cost method to benchmark system efficiency without requiring extensive user testing.

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Implication

Modeling study demonstrates accurate prediction of task execution times in computer users, suggesting designers can quantitatively evaluate interface designs before prototyping.

Cite This Study

Card et al. (1980) studied this question.

synapsesocial.com/papers/69d8f60e183921ebcaae42d9 https://doi.org/10.1145/358886.358895

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Implication

Modeling study demonstrates accurate prediction of task execution times in computer users, suggesting designers can quantitatively evaluate interface designs before prototyping.

The keystroke-level model for user performance time with interactive systems

Key Points

Discussion

Implication

Cite This Study

The keystroke-level model for user performance time with interactive systems

Key Points

Discussion

Implication

Cite This Study

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