Measuring the Intent in a Child's Smile

It is well-known that those who have charge of young infants, that it is difficult to feel sure when certain movements about their mouths are really expressive; that is when they really smile. Hence I carefully watched my own infants. One of them at the age of forty-five days, and being in a happy frame of mind, smiled... I observed the same thing on the following day: but on the third day the child was not quite well and there was no trace of a smile, and this renders it probable that the previous smiles were real.


Darwin describes his methodology for determining if his infant's smile was intentional.

Folksonomies: parenting psychology observation experiment

/home and garden/bed and bath/bedroom/beds and headboards (0.276801)
/health and fitness/dental care (0.266707)
/family and parenting/children (0.195060)

Smile Darwin (0.973916 (positive:0.631242)), young infants (0.835365 (neutral:0.000000)), certain movements (0.826253 (negative:-0.267344)), happy frame (0.785799 (positive:0.568929)), previous smiles (0.782483 (neutral:0.000000)), child (0.514750 (positive:0.450417)), mouths (0.468548 (negative:-0.267344)), Intent (0.461687 (positive:0.631242)), methodology (0.439555 (positive:0.631242)), charge (0.428264 (neutral:0.000000)), thing (0.421897 (positive:0.284091)), trace (0.421784 (positive:0.269592)), age (0.396400 (neutral:0.000000))

Smile Darwin:Person (0.974994 (positive:0.631242)), forty-five days:Quantity (0.974994 (neutral:0.000000))

Smile (0.948683): dbpedia | freebase | opencyc
Cognition (0.755007): dbpedia | freebase | opencyc
2004 albums (0.696165): dbpedia
Epistemology (0.662834): dbpedia | freebase | opencyc
English-language films (0.645381): dbpedia

 The Expression of Emotions in Man and Animals
Books, Brochures, and Chapters>Book:  Darwin , Charles (2008), The Expression of Emotions in Man and Animals, MobileReference, Retrieved on 2012-03-23
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  • Folksonomies: psychology