Validation and Test-retest Study of the Star-shaped Manual Dexterity Test.

Summary

The purpose of this study is to measure test-retest reliability and validate the star shaped test of manual dexterity. The purpose of this is to see if there is any significant learning effect, and if the test can discriminate between individuals who are at their normal skill level, and when they are stressed and/or fatigued. The test is designed to test hand to eye coordination and precision control. This is done by following a star shaped track with a pair of a surgical scissors. this is done 10 times, 5 times clockwise and 5 times counter clockwise. Each time the scissors come into contact with the border of the track, an error is counted. Overall completion time is recorded. As a randomized crossover study, we will have 20 test subjects complete the test 4 times. Each test will be conducted with a pause of two breaks between the tests. Before each test, the test subjects are randomized to: no intervention, physical fatigue prior to testing, distractions during the test or both physical fatigue prior to testing and distractions during the test. All participants will complete a test with all four interventions. Furthermore, a test-retest trial will be conducted on 4 test-subjects. Each subject will complete the test two times with no interventions, with two days apart.

Conditions

• Manual Dexterity

Interventions

OTHER

Stretched arm test

Measurement of static arm strength. Test subject is asked to hold a 2.5 kg weight in their dominant arm fully extended at 90-degree flexion and 15-degree abduction as long as possible without moving.

OTHER

Stress

During completion of the star shaped manual dexterity test, the test subject is asked to identify cards from a regular deck of playing card by naming the suit and rank of the card. They will be asked to identify one random card during each of the 10 rounds in the completion of the test

DEVICE

Star shaped manual dexterity test

On a piece of wood, a piece of metal (dimensions 22 cm x 22 cm) is mounted. In the center of the metal plate, is a star shaped track. The star has 6 points and the track is 9 mm wide. It measures 15,3 cm from the tips of opposing arms of the star. With a surgical scissor in his dominant hand, the test subject is instructed to follow the star shaped track ten times, five times clockwise and five times counter clockwise. Contact with the border of the track is counted as an error. A computer software program automatically registers completion time and number of errors. The test is conducted in an undisturbed environment.

Sponsors & Collaborators

• Herlev Hospital

  lead OTHER

Principal Investigators

• Niels Kildebro, BSc.med. · Herlev Hospital, Copenhagen University

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Model

CROSSOVER

Eligibility

Min Age

20 Years

Max Age

55 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2014-06-30

Primary Completion

2014-09-30

Completion

2014-09-30

Countries

• Denmark

Study Locations