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Message: <blockquote data-quote="elkcub" data-source="post: 3162634" data-attributes="member: 14473">Oh, we agree.  The problem is in creating a measurement system that reflects our experiential knowledge — and can also be validated.  All of these systems, like Allbinos, Cornell, and so forth, essentially produce commercial hype under the guise of being scientifically rigorous.  If someone wanted to develop a system, one place to start would be a modified version of the <a href="http://en.wikipedia.org/wiki/Cooper%E2%80%93Harper_rating_scale" target="_blank">Cooper-Harper aircraft rating scale</a>.  Back in 1967 I was lucky to be assigned to NASA's technical review board, and got quite an education.  The scale isn't perfect, and it took a lot of work to develop and validate.  So these kinds of things  can be done.  In this case there would be a need for birding task analyses, expert birders, good statisticians, and research support, i.e., mucho $$$.  Don't blame me, I'm only the messenger.  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />Ed</blockquote>