Hockett's "design features" of language and other animal communication systems
Crickets Bee dancing Western meadowlark song Gibbon calls Signing apes Alex, a Grey parrot Paralinguistic phenomena Human sign languages Spoken language
Vocal-auditory channel Auditory, not vocal No Yes Yes No Yes Yes No Yes
Broadcast transmission and directional reception Yes Yes Yes Yes Yes Yes Yes Yes Yes
Rapid fading (transitoriness) Yes, repeated ? Yes Yes, repeated Yes Yes Yes Yes Yes
Interchangeability Limited Limited ? Yes Yes Yes Largely yes Yes Yes
Total feedback Yes ? Yes Yes No Yes Yes No Yes
Specialization Yes? ? Yes Yes Yes Yes Yes? Yes Yes
Semanticity No? Yes In part Yes Yes Yes Yes? Yes Yes
Arbitrariness ? No If semantic, yes Yes Largely yes Yes In part Largely yes Yes
Discreteness Yes? No ? Yes Yes Yes Largely no Yes Yes
Displacement Yes, always ? No Yes No In part Yes, often Yes, often
Productivity No Yes ? No Debatable Limited Yes Yes Yes
Traditional transmission No? Probably not ? ? Limited Limited Yes Yes Yes
Duality of patterning ? No ? No
[Cotton-top tamarin: Yes]
Yes Yes No Yes Yes
Prevarication Yes No Yes Yes
Reflexiveness No? No Yes Yes
Learnability Yes Yes Yes Yes