Is learning meaning of 'no' by tone of voice used
This is the child's ability to both understand and use language. For example, this includes a 12-month-old baby saying his first words, a two-year-old naming parts of her body, or a five-year-old learning to say "feet" instead of "foots".
TIP: How you use the word "no" is very important. If you say "no" and allow a child to continue, he will learn that "no" is a warning, not a command. If you say "no" repeatedly, your child will learn that the the word must be repeated to be meaningful. Saying "no" once, and helping your child to obey will establish a healthy understanding of that word.
Concerned that your child hasn't met this milestone yet?
Concerned your child hasn't reached a milestone?
Children achieve milestones at different times – often related more to temperament than intelligence or ability. Tumblon presents the normal range for its developmental milestones. If you are concerned that your child has not achieved a milestone by the end of the normal range, you should discuss it with your pediatrician.
In addition Early Intervention Support provides evaluation for developmental delays and support services for children with diagnosed developmental delays. Early diagnosis and therapy (which is often free) can help many children overcome their delays. Find early intervention services in your state or ask a therapist.
Source: Your Baby's First Year: Week by Week