On Jul 4, 2007, at 12:20 AM, Biju Chacko wrote:
On 7/4/07, Ved Prakash Vipul <[EMAIL PROTECTED]> wrote:
measure), 3) spontaneous yawning is performed by fetuses in the womb,
but kids don't learn contagious yawns until several years after
birth.
I've noticed that my son's yawning may cause me to yawn but not vice
versa. I guessed it developed later. The question is, is it a reflex
that takes some time to develop or is a learned behavior?
IIRC, the authors differentiate between spontaneous yawning and
contagious yawning (the reflex to propagate a spontaneous yawn). So,
perhaps, contagious yawning is learnt and spontaneous yawning
is instinctive.
