CHAPTER VII.

DEVELOPMENT OF LAUGHTER DURING THE FIRST THREE YEARS OF LIFE.

Problem of the early development of laughter in the individual • 186

Development of smile and laugh as movements • 188

The general process of emotional development • 189

Relation of laughter of joy to that of play • 194

Development of laughter of joy • 195

Emergence of laughter of surprise • 197

First laughter of release from strain • 197

Crude form of laughter of jubilation • 198

Development of laughter as accompaniment of play • 198

Early forms of laughing impishness • 201

First manifestations of rowdyish laughter • 203

Germs of roguish laughter • 205

First crude perceptions of the laughable • 207

The mirthful greeting of sounds • 209

Early responses to the funny in the visible world • 212

First enjoyment of pretences • 214

Early laughter at the improper • 215

Dim perceptions of the incongruous and the absurd • 216

Early sense of verbal fun • 217

Summary of results • 218