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From: WVE~ol.com
Date: Wed, 14 Apr 1999 00:21:22 EDT
Subject: Re: Buckeye announcement: Comb Materials Test

> . . . . . . . . . . . . . . . . . . . . . . . . . .
> . . . B H F ' 9 9 A N N O U N C E M E N T . . .
> . . . . . . . . . . . . . . . . . . . . . . . . . .
> . . . . . . . . N E W E V E N T . . . . . . . . .
> . . . . . . . . . . . . . . . . . . . . . . . . . .
> Event: Comb Materials Test
> Date: Friday, April 16
> Time: 4:30 PM
> Host: John Thaden

> The test will begin promptly at 4:30 on Friday, April 16, and will last
> until 5:30. This is after the Teach-In with Joe Filisko and friends, and
> before the evening activities.

Will Filisko lend a brass comb and Lavoie a Ti comb for use in the test?

> The test design imposes certain limitations: First, the harmonicas must be
> easily heard unamplified, so I've selected a classroom-sized room instead
> of an auditorium;

This avoids one of the criticisms of the SPAH97 test.

> I'll only be explaining how to mark the
> test sheets, not lecturing on harmonica physicoacoustics, even if I could.

This avoids a criticism of the SPAH97 test.
>
> Unlike previous tests, only two comb materials will be compared at a time,
> and listeners will be asked only to guess whether the comb is "same" or
> "different", from that on a harmonica played just previously--an A/B
> design.

This avoids a criticism of the SPAH97 test.

Also unlike previous tests, the same set of reed plates and cover
> plates will be used with all combs, switched rapidly from one to the other
> via a custom-built quick-release clamp.

This avoids a criticism of the SPAH97 test.

> John J. Thaden, Ph.D., Instructor jjthad~ife.uams.edu
> Department of Geriatrics (501) 257-5583
> University of Arkansas for Medical Sciences

It was suggested beforehand that the SPAH97 test be designed and supervised by
a Phd-degreed academic with a knowledge of blind scientific testing and of
statistics. Unfortunately, you just got Vern in 97.

This avoids a criticism of the SPAH97 test.

John's design controls the variables that left the SPAH97 test open to
criticism and the results open to doubt.

I won't be there. However, I hope that all of you harp-l Buckeye attendees
will participate. The harmonica community should be grateful to John for
organizing and conducting this vastly-improved materials test.

Vern