Dr. Ronald Barr Explains the
The Period of PURPLE Crying is an
Period of PURPLE Crying
evidence-based infant abuse
prevention program which educates
parents and caregivers about normal
infant crying and the dangers of
shaking an infant.
Listen to a full explanation of the
program from Dr. Ronald G. Barr,
MA, MDCM, FRCP(C),
Developmental Pediatrician and
world expert on infant crying.
Scientific Research on the ProgramOver the last several years, the body
of robust, scientific research on infant
crying, shaken baby syndrome
/abusive head trauma (SBS/AHT)
and the Period of PURPLE Crying,
has grown significantly.
Numerous studies have been
conducted by researchers across the
country. Click here to read short
summaries of the studies currently
underway or recently completed.
PURPLE Implementation MapThe Period of PURPLE Crying has
grown extensively throughout North
America over the past few years with
49 of 50 U.S. States and 8 of 10
Canadian Provinces having
implemented the program at some
Click here to view a map of over 800
locations throughout North America
where PURPLE is distributed to
parents and caregivers.