These are the most frequently used words in this book.
action
activities
adults
age
although
animals
another
attachment
babies
behaviour
between
boy
care
case
chapter
child
children
course
day
development
different
does
early
even
events
example
experience
experiment
fact
father
figure
first
form
found
freud
go
group
home
human
important
individual
information
intelligence
kind
later
learn
learning
life
little
look
may
method
might
monkeys
months
mother
need
new
nursery
objects
observation
often
others
own
parents
part
people
period
piaget
play
problems
psychologists
questions
relationship
school
scores
see
sense
several
shows
social
stage
study
subjects
take
test
theory
things
though
three
time
two
used
variable
without
words
work
world
years
young