Experimental work had been done so far on only one child, Albert
B. This infant was reared almost from birth in a hospital
environment; his mother was a wet nurse in the Harriet Lane Home
for Invalid Children. Albert's life was normal: he was healthy
from birth and one of the best developed youngsters ever brought
to the hospital, weighing twenty-one pounds at nine months of
age. He was on the whole stolid and unemotional. His stability
was one of the principal reasons for using him as a subject in
this test. We [p.2] felt that we could do him relatively little
harm by carrying out such experiments as those outlined below.
At approximately nine months of age we ran him through the
emotional tests that have become a part of our regular routine
in determining whether fear reactions can be called out by other
stimuli than sharp noises and the sudden removal of support.
Tests of this type have been described by the senior author in
another place. In brief, the infant was confronted suddenly and
for the first time