Another audiogram tool that builds on the idea behind the speech banana is the "Count the Dots" audiogram developed by Killion and Mueller in 1990 and updated in 2010. A count the dots audiogram ...

Like all slugs, banana slugs use four tentacles to sense their environment. A pair of upper tentacles, protruding from the top of their heads, are optical. Tiny black dots, or “eyes,” at the ...