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Related Experiment Videos

Word frequency during copytyping.

A W Inhoff1

  • 1Center for Cognitive and Psycholinguistic Sciences, State University of New York, Binghamton 13901.

Journal of Experimental Psychology. Human Perception and Performance
|May 1, 1991
PubMed
Summary
This summary is machine-generated.

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Visual encoding of text does not impact typing speed, but word frequency affects motor programming for typing. This suggests word frequency influences keystroke sequencing, not visual processing during typing.

Area of Science:

  • Cognitive Psychology
  • Human-Computer Interaction
  • Motor Control

Background:

  • Understanding the cognitive processes involved in typing is crucial for optimizing human-computer interaction.
  • Previous research has explored factors influencing typing speed, but the interplay between visual encoding and motor programming requires further investigation.

Purpose of the Study:

  • To investigate the effects of visual encoding and manual motor programming on copytyping performance.
  • To determine whether text comprehension or typing speed emphasis influences the impact of word frequency on typing.
  • To differentiate the roles of visual processing and motor programming in word frequency effects during typing.

Main Methods:

  • Two experiments were conducted with expert typists.

Related Experiment Videos

  • Experiment 1 manipulated target word frequency (high vs. low) and task instructions (speed vs. comprehension).
  • Experiment 2 further explored the mechanisms behind word frequency effects on keystroke programming.

    • Main Results:

    • Typing speed was not affected by target word frequency when speed was emphasized, suggesting visual encoding does not interfere with concurrent keypresses.
    • Comprehension-focused typing led to increased typing times for words preceding low-frequency targets.
    • Low-frequency words were typed slower than high-frequency words, indicating word frequency impacts motor programming of keystroke sequences.

    Conclusions:

    • Visual encoding of text does not directly influence concurrent keypresses during typing.
    • Word frequency significantly affects the manual motor programming of keystroke sequences, impacting typing speed.
    • The observed effects of word frequency are attributable to motor programming, not solely to visual processing or movement practice.