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Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...
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Related Experiment Video

Updated: Mar 22, 2026

A Tactile Automated Passive-Finger Stimulator TAPS
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Stereotypes for lever-tap operation.

Alan H S Chan, Steve N H Tsang, Errol R Hoffmann

    Work (Reading, Mass.)
    |April 23, 2016
    PubMed
    Summary
    This summary is machine-generated.

    User expectations for dual lever-operated taps show strong stereotypes for increasing water flow but weak ones for decreasing it. Lever taps offer no significant advantage over cross-taps for user expectations in flow control.

    Keywords:
    Lever tapsincreasing/decreasing flowstereotype strength

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    Area of Science:

    • Human-Computer Interaction
    • Ergonomics
    • Product Design

    Background:

    • Lever-operated taps are increasingly common in healthcare and food industries due to ease of use.
    • Limited data exists on user expectations for lever-tap operation.
    • This study investigates user interaction with dual lever-operated water taps (faucets).

    Purpose of the Study:

    • To compare different lever-tap designs and user operation stereotypes.
    • To verify user stereotypes for controlling water flow (increasing/decreasing).
    • To inform improved design of lever-operated taps.

    Main Methods:

    • 240 participants interacted with simulated dual lever-taps.
    • Participants indicated directions for increasing/decreasing water flow.
    • Nine initial lever positions were tested with levers operating horizontally.

    Main Results:

    • Strong user stereotypes (over 80%) were observed for increasing water flow, particularly when levers initially pointed outwards.
    • No strong stereotypes were found for decreasing water flow across various initial lever positions.
    • Stereotype reversibility for flow control was weak.

    Conclusions:

    • Dual lever-tap designs exhibit strong user stereotypes for increasing water flow but weak ones for decreasing it.
    • Lever taps do not offer a significant user expectation advantage over traditional cross-taps for flow control.
    • Findings suggest potential design improvements for intuitive tap operation.