Today I speak with Evan Jordan of Oklahoma State University in the U.S. about her research in to the contagiousness of positive emotions in infants, through the use of infant laughter as a stimulus. 
If you would like to hear about how psychologists get babies to laugh and why it is that they want them to laugh, then you'll find this episode to be fascinating. 
Enjoy,
Glen. 
Don't forget to check out the Laughter Store at www.laughterresearch.com