Historical
Psychologists such as the American John B Watson, believed that environment was the main factor and that any child could be fashioned into almost anything. This echoes the Jesuit motto: “Give me a child until he is seven and I will give you the man”. Sigmund Freud’s disciples also supported the “environmentalists” and claimed that most deviant child behavior was caused by mismanagement on the part of the parents.
This view was supported by the Swiss psychologist Jean Piaget. He studied how children learn, by detailed observations on his own three children. He became intrigued with his observation that children of a similar age often gave the same wrong answers to questions. This implied that there were persistent differences in the thinking and reasoning skills at various ages, which were not merely due to increased intelligence. Over the next few decades, he developed the concept that a child’s thought processes developed along particular patterns, independent of environmental influences.
Noam Chomsky observed that children had an innate knowledge of basic grammar common to all languages. This is interpreted that certain fundamental aspects of language development being due to nature rather than nurture. Obviously the environment will determine whether a person will speak one language or another.
Thus nature provides the basic framework for child development, upon which nurture will shape subsequent growth.
In the field of personality development, Arnold Gesell proposed that as a child grows older, he assumes a new identity, a new personality. Therefore at each age, a child is not merely older and cleverer, but actually becomes a completely different person.
In 1965, the American psychologist and educator, Edward Zigler, introduced the Head Start program, which was an intervention program designed to give children from poor families a head start on their education. It has been beneficial and has given a boost to disadvantaged children as well as their parents.
Normal Child Development
Child development is the story of how a baby transforms from a helpless infant into a mature, independent, talented, intelligent, and loving adult. It includes following a child’s physical and intellectual progress, personality and social development.
The most prominent exception in the order of development, which is accepted as normal, is the absence of crawling. About 25 percent of children never crawl, and go straight from sitting to standing and walking, bypassing the crawling stage. Other children move themselves sitting on their buttocks, a form of propulsion known as “bottom shuffling”. Such children are delayed in their walking, which may not emerge until about two years of age. Development before and after this period of bottom shuffling is entirely normal. Perhaps the most variable component of childhood development is that of speech. While most children can say single words by 10-12 months, this can occasionally be as late as two years. A stimulating environment helps promote earlier development.
One Month Old
The one-month-old behaves very much like a newborn baby. He may be able to start smiling and to track movements by following with his eyes. The neck muscles are still weak and, if tilted forwards backwards, the head will just flop down. Although he cannot locate the source of a sound by turning his head, he can be startled by a sudden loud noise like a door bang.
Three Months Old
The three-month-old baby is starting to gain more muscle control, and can hold the head upright a bit longer, but this is still a shade unsteady. The smile is now a definite social smile in response to a familiar face or to express real happiness. Some children may start to roll half way from the back to the front. Some may start swiping at an object placed in front of them. If you give him a rattle, the first thing he does is to put it in his mouth as a form of oral exploration. He can make a lot more noise by babbling.
Six Months Old
The six-month-old is full of energy. If, when lying on his back, he sees you offer to pull him up to sit, he will anticipate you and tilt his head forward. The back will straighten and his knees will be bent, with the legs lifted up in the air. He can reach out to grab a toy, and transfer it from the left hand to the right. He may even be able to sit with his hands propped out in front like a tripod.
When he sees someone familiar he will squeal or laugh. He knows that he can make you smile by beaming a smile over to you. Babbling is much more frequent, and he might start blowing bubbles from the mouth. The first tooth may be starting to erupt, but this is a variable event, and some children do not have their first tooth until after their first birthday. From about six months old, children may develop stranger anxiety, so if they see a strange face, they might start crying.
Nine Months Old
The nine-month-old baby can sit without using his hands to support himself, and he can pull himself up to stand. Most nine-month-old children can crawl, but about a quarter of all babies bypass the crawling stage, and go straight from sitting to standing and walking. The baby can now pick up tiny objects between finger and thumb, clap hands and wave bye-bye. He might be able to say “ma” or “ba”, or just continue babbling. He should be able to turn his head to locate a sound source. You will probably be able to play games such as “peek-a-boo” with your nine-month-old.
One Year Old
The one-year-old can stand and walk around holding onto your hand or onto some furniture. He can say single words other than “ma” and “ba”, and understand simple commands like “give!” He might begin to show preference in using the right or the left hand. When given an object such as a rattle, he will examine it in different ways, like shaking it, hitting with it, throwing it, or mouthing it. He enjoys looking at the pictures in a book, and will point correctly to the familiar object that you name. But he is unable to turn the pages singly, grasping several pages at once. If a small object is hidden with a piece of cloth or paper, he will realize that it still exists, and will remove the cloth or paper to uncover it. This is known as object permanence. By 13-15 months of age, he can walk unaided.
Eighteen Months Old
The 18-month-old can walk very securely, and might even run around or stoop to pick up a toy. He can say several single words, such as “bird”, “dog”, “grandma”, and “brother”. When given some wooden cubes, he can build a tower with at least three of them. If given the opportunity, he can learn to drink from a cup, and attempt to eat using a small plastic spoon. When given a large nontoxic crayon, he can scribble with it. He can point to his nose and other body parts, and can roll a ball back to you. He can brush or comb hair, and hold a phone to his ears. Emotionally, he is still a little sensitive, and if you say “no” to him in too harsh a tone, he might cry.
My 18-month-old is still not walking yet. Should I worry?
Most children start to walk around 13-15 months. But there are some who start walking relatively late. Their parents may also have walked late. If walking is the only developmental delay, and the rest of the child is normal, then there is nothing to worry. Some children who get around by shuffling on their bottoms tend to walk around 20-24 months of age. However, if your child is not walking at 18 months, it is best to consult your doctor. Conditions that are associated with late walking include muscle and joint problems, or problems with the nervous system.
Two Years Old
The two-year-old can run around and climb up and down stairs holding onto the rail. He can build a tower of six blocks, scribble with pencil and paper, pour from a bottle, and point to the nose when asked. He can drink from a cup, and can sometimes indicate his toilet needs. He can join words together into a short phrase, like “no more”, “all gone”, “mama eat”, “go there”. Some become a little negative, and say “no” to whatever you want them to do. This may be a method of attention seeking. Although he can interact with adult caregivers, when placed with another child, he will probably play by himself with relatively little interaction. This is known as parallel play.
Three Years Old
The three-year-old can run so fast that you may have difficulty catching him. He can stand on one leg, jump, and ride a tricycle. He can build a tower of nine blocks, and turn the pages of a storybook singly. He can speak in short sentences comprising five words or more. He enjoys bombarding you with questions like “why?” and he can enter into a conversation with you. He can identify colors, and can answer correctly when asked “What is your name?”, “How old are you?”, and “Are you a boy or a girl?” When given a pencil, he can draw a straight line, circle, and a cross. Make-believe play, such as pretending to be a parent, can become quite imaginative. There will be much more interaction with other children, and this is the age when he might profit from a playgroup. He can feed himself, but is quite sloppy. He may be dry by day, and can indicate when he wants to go to the toilet. When upset, however, the three-year-old is prone to temper tantrums.
Four Years Old
The four-year-old can hop, leap, climb all over the place, and can start to use chopsticks. He can tell you a simple story, like The Three Little Pigs. He can draw a square, a triangle, and a picture of a person made up of only three to five body parts, albeit the limbs shown as stick figures. He can recognize numbers, alphabets, and knows opposites (small-big, hot-cold). He can sit reasonably still at the dinner table and feed himself. Many would have started attending either a nursery school or a kindergarten. He can put on and remove his socks and shoes. His play can be quite imaginative, and he can pretend to be a doctor looking after a doll patient. He can be quite susceptible to television advertisements, and join with current childhood fads. This age is probably the most dangerous time for your child because he is able to do many things, and yet has no perception of danger, such as when jumping from a height or dashing across the road. He can speak quite fluently, maintain a coherent conversation, read a few simple words, and count to ten.
Five Years Old
The five-year-old can somersault and jump down from two steps. Most are dry throughout the day and night, although a small but significant percentage still bed wet. He can hold a long discussion with you. He can read words such as “chicken” and “flower”, or even short sentences. He can write the letters of the alphabet and simple words, including his own name. He should be able to do easy additions and subtractions. The five-year-old is able to express concern over his younger sibling, and can show the little one the pictures in a storybook. However, he may not be able to distinguish fact from fantasy, and may tell untruths as if they were true. For example, he might say “I went to teacher’s house today”. His sense of time may also be inaccurate, so when he says “Yesterday I went to the toyshop”, it may mean that a few months ago, he was at the toyshop.
Developmental Delay
If a child fails to attain certain developmental milestones at the expected age, then that child may be developmentally delayed. For example, the normal child might start walking as early as nine months, and the median age for walking for most populations is around thirteen months. But if a child is unable to walk by eighteen months, one would consider him developmentally delayed. No two individuals develop at the same rate, so therefore a sound knowledge of normal childhood development and its variations is essential in the assessment of developmental delay.
Diagnosis of Developmental Delay
A child is considered developmentally delayed if he is behind in any one of the major areas of development:
A. Motor Development
– Head lags behind when pulled to sit by four months
– Not reaching for objects by five months
– Not rolling over by seven months
– Not sitting tripod by seven months
– Not sitting unsupported by ten months
– Not walking unaided by 18 months
B. Hearing and Language Development
– Failure to respond to noise
– Not babbling by six months
– Not saying single words by 18-20 months
– Not speaking in two or three-word phrases by three years
C. Personal and Social Development
– Not smiling by eight weeks
– Not waving goodbye or clapping hands by 15 months
Conclusions
Understanding normal childhood development helps you provide appropriate care for your child, and appreciating the variability of this development can allay some of your anxieties.
Developmental delay may be a variation of normal development, especially if the delay runs in an otherwise normal family. On the other hand, it may signal potential problems. A delay in motor skills could be due to cerebral palsy or a muscular dystrophy. A delay in intellectual development may indicate an intellectual disability. A delay in speech development may be due to hearing deficit, specific language disorders, or an autistic spectrum disorder.
If you notice any developmental delays, do consult your doctor or health care provider.
(By Kenneth Lyen)