Poor Design

Competing Classification Systems

I’ve been reading First Aid, CPR and AED Advanced.  Overall, the book has been pretty clear, but there have been a few exceptions. Page 95 (below) is one of them.

Page 95 of First Aid, CPR and AED Advanced, Sixth Edition.

This page messes with my mind.  To me, it’s just like that mildly annoying color-related brain teaser that tries to trick your brain – which apparently is well documented and called the Stroop Effect.

In this flowchart, when the designer(s) decided which of the two choices (‘Yes’ or ‘No’) should be green and which should be red, they adopted the very common classification system where ‘Yes’ is green and ‘No’ is red.  However, they overlooked the context of the diagram, and specifically, what ‘Yes’ and ‘No’ indicate.

In this diagram ‘Yes’ means the victim has a head injury or has significant breathing problems.  My mind wants that to be colored red because it conveys a huge negative.  This classification system ought to trump the more basic one.  It’s more aligned with how my mind works.  Maybe if you’re a real Yes/No-oriented person, you see it the other way.