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Controls for remote-controlled zoom lenses.

M B Cooper¹, A C Cox, F Garnham

¹Post Office Research Centre, Martlesham Heath, Ipswich, UK.

Applied Ergonomics

|June 1, 1979

Summary

Public expectations for zoom control labels on remote lenses were investigated. No stereotype was found for standard buttons or rocker switches, but a novel design based on user suggestions showed a significant stereotype for zoom direction control.

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Area of Science:

Human-Computer Interaction
Usability Engineering
Control Systems Design

Background:

Understanding user expectations is crucial for intuitive interface design.
Previous research has explored population stereotypes for various controls, but zoom lens controls lack established conventions.
The relationship between physical controls and perceived function significantly impacts user experience.

Purpose of the Study:

To investigate public expectations for the labeling of zoom controls (pushbuttons and rocker switches) on remote-controlled lenses.
To determine if a population stereotype exists for zoom direction control.
To evaluate a novel button arrangement designed to align with user-suggested labels.

Main Methods:

Two experiments were conducted involving members of the public.
Experiment 1 assessed expectations for standard pushbutton and rocker switch arrangements for zoom control.
Experiment 2 tested a novel concentric button design informed by Experiment 1 findings.

Main Results:

No population stereotype was found for either the pushbutton or rocker switch arrangements.
Participants frequently suggested 'Zoom In/Zoom Out' or 'Close-up/Distant' as labels.
The novel concentric button arrangement demonstrated a significant stereotype aligned with these user-suggested labels.

Conclusions:

Standard pushbutton and rocker switch designs lack an intuitive mapping for zoom control direction.
User-generated labels provide valuable insights for designing more intuitive zoom controls.
A concentric button design can effectively embody user expectations for zoom direction, improving usability.

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