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Electrically instrumented mirror-drawing apparatus

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Evidence · 2 claims (2 for) · 1 study (1 design), q1 · 0 of 1 report an effect size · 2 claims rest on one study

Description

A Wells (1915) psychological-laboratory apparatus that uses a mirrored star-tracing task, electrical error counting, and elapsed-time measurement to assess motor learning performance.

Components

  • Electrically instrumented mirror-drawing apparatus that automatically registers errors: A laboratory apparatus for the mirror-drawing test consisting of two concentric metal stars with the intervening star-shaped space filled with hardened plastic, connected to an electric counter and a metal-tipped stylus. The article reports that "Any and every time the stylus moves from the inscribed star the counter registers", so that at the conclusion of the test the number of errors is read from a dial just as elapsed time is. The inscribed star "measures ten centimetres from point to point, and is one and a half millimetres in width", with brass strips five millimetres wide, a pivoted mirror, and a screen separating hand from eyes. (Wells (1915))

Claims

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Key Sources

  • Wells, G. R. (1915). An apparatus for the mirror-drawing test; Percentile norms for scaling data. Journal of Educational Psychology. https://www.google.com/search?q=%22An+Apparatus+for+the+Mirror-Drawing+Test%22
Page metadata
Field Value
type product
id electrically-instrumented-mirror-drawing-apparatus
title Electrically instrumented mirror-drawing apparatus
description A Wells (1915) psychological-laboratory apparatus that uses a mirrored star-tracing task, electrical error counting, and elapsed-time measurement to assess motor learning performance.
status review
product_kind assessment
generated by process:settle-candidates on 2026-10-24
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