Growing Up: What Changes and What Shapes Us, Explained

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Growing Up: What Changes and What Shapes Us

Educational Psychology · Chapter 4: Cognitive and Social Development in ChildrenSection 4.1 · lesson 28 of 1009 min · free with a free account

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In this lesson

Four domains, the interactionist view, and windows of heightened opportunity.

  • Name the four domains of development and how they interact
  • Explain the interactionist perspective on nature and nurture
  • Describe how epigenetics supports that perspective
  • Distinguish sensitive periods from critical periods

Transcript

Everything said in the video, section by section (1,161 words). Read along, or search it.

Cognitive and Social Development in Children

Growing Up: What Changes and What Shapes Us

Two five-year-olds arrive in the same classroom on the same morning. One can hold a conversation about what someone else is thinking. The other genuinely cannot, and no amount of teaching will change that today. This section is about what develops, and what shapes it. We will look at four domains of development, and how they interact. At milestones, and at what they are and are not for. Then at the nature and nurture question, which is not the question people think. We will cover epigenetics, and sensitive periods. And we will distinguish a sensitive period from a critical one. That distinction changes what early intervention is actually claiming.

Four Domains

Development Happens on Four Fronts

Human development unfolds across four interrelated domains. Physical development covers body size, motor skills, and neurological maturation. Cognitive development covers thinking, reasoning, memory and problem-solving. Emotional development covers the emergence and regulation of feelings. It also covers empathy, and the growth of self-concept. Social development covers the capacity to form relationships. To understand social norms, and to navigate interpersonal environments. Four domains, and it is tempting to treat them as separate tracks. They are not. They do not develop in isolation. Advances in one area frequently enable progress in another. Or constrain it, which matters just as much. A child without emotional regulation cannot access cognitive work they could do.

Milestones

Normative Benchmarks, Not Deadlines

Developmental milestones are normative benchmarks. They describe the typical sequence of major developmental achievements. And the approximate timing of each. A few concrete examples make the idea real. Most children walk independently between twelve and fifteen months. Two-word combinations appear between eighteen and twenty-four months. And theory of mind develops around age four. That last one deserves a moment. Theory of mind is understanding that other people have beliefs and desires. Beliefs and desires different from your own. Before it arrives, a great deal of ordinary social behavior is unavailable. Not refused. Unavailable.

Nature And Nurture

A Question That Was Asked Wrong

The nature versus nurture debate is one everyone has heard of. It asks how much of development is genetic inheritance. And how much is environmental experience. Contemporary developmental psychologists have largely abandoned it. Not because it was answered, but because it was framed wrong. The interactionist perspective is now widely accepted. Development is the product of a dynamic, bidirectional interaction. Genes set boundaries and tendencies. Environments shape how and when those tendencies get expressed. Take a child with a genetic predisposition for mathematical reasoning. That potential is realized only through appropriate educational experience. Through nutrition, and through emotional support. Otherwise it stays potential.

Epigenetics

Biological Evidence for the Interaction

Epigenetics gave the interactionist view a biological mechanism. It is the study of how environmental factors switch genes on or off. And it does so without altering the DNA sequence itself. Which is a striking finding, because it means experience reaches the genome. Three kinds of early experience have been studied most. Stress. Nutrition. And caregiver responsiveness. Each has been shown to produce lasting changes in gene expression. With consequences for cognitive and emotional development. Notice what that finding does to an old argument. You cannot separate the biological from the environmental here. The environment is operating through the biology. Which is a direct argument for early education and stable, nurturing homes.

Key Idea

The Learning Environment Is Not Neutral

Here is the key idea, and it is one teachers should take personally. Development is neither purely genetic nor purely environmental. Genes and experiences work together, continuously. Which means educators have genuine power to shape developmental outcomes. Not unlimited power. Genuine power. The learning environment is not neutral. It actively influences who children become. It is never simply a container in which development happens to occur. That conclusion is encouraging, and it is also uncomfortable. Because a neutral environment is not one of the available options. Whatever you build, it is shaping something.

Sensitive Periods

Windows of Heightened Responsiveness

Sensitive periods are windows of heightened responsiveness. During them, the developing organism is particularly responsive. Responsive to certain specific types of environmental input. Something specific is happening biologically during those windows. The relevant neural circuits are maximally plastic. So experience has a disproportionately large and lasting effect. The best-documented case is language acquisition. Children acquire language with remarkable ease in the first decade of life. And with near-perfect accent, which adults almost never manage. Second-language acquisition becomes progressively more effortful after puberty. Same person. Same intelligence. Different window.

A Distinction

Sensitive Is Not Critical

It is important not to confuse a sensitive period with a critical one. A critical period is a window during which development must occur. If it does not occur then, it will not occur at all. A sensitive period is different, and less absolute. It represents heightened opportunity, rather than absolute necessity. That distinction matters for how we talk about early intervention. The educational claim is about efficiency, not impossibility. Interventions delivered during sensitive periods are more efficient. And they are more durable than the same interventions delivered later. This is the primary scientific rationale for early childhood investment. For programs such as Head Start, and universal pre-kindergarten. Later is harder. Later is not hopeless, and those are different claims.

By Age Band

What Each Domain Is Doing, When

Look at what each domain is doing across three age bands. In early childhood, physical development is rapid growth and motor skills. Cognitive development is a language explosion, and symbolic thinking. Emotional development is basic emotions, and attachment bonds. Social development is parallel play, and caregiver relationships. In middle childhood, growth steadies and coordination sharpens. Logical thinking arrives, along with reading and numeracy. Self-concept forms, and empathy develops. Peer friendships appear, and rule-based play with them. In adolescence, puberty arrives and the prefrontal cortex is still maturing. Abstract reasoning and metacognition become available. Identity formation dominates, along with emotion regulation. And social life reorganizes around peer groups and romantic relationships.

In Practice

Two Siblings, One Vocabulary List

Here is a sensitive period visible in one family. A kindergarten teacher notices something about a new student. The child recently arrived from a home where English is not spoken. She absorbs new English vocabulary with astonishing speed. Her older sibling, in middle school, struggles with the same words. Same household. Same exposure. Same motivation to learn. The explanation is developmental rather than motivational. The younger child is inside the sensitive period for language. The older one is not. So the teacher deliberately enriches the classroom while the window is open. Vocabulary-rich read-alouds. Word walls. Partner conversations. She is not working harder. She is working at the right time.

Differentiation

Sequence, Not Timetable

One caution before leaving this section, and it is important. Understanding developmental milestones does not mean enforcing a timeline. Variation within normal development is the rule, not the exception. A milestone is a description of typical timing, not a deadline. So what do milestones actually give a teacher? They give you the expected sequence. And knowing the sequence is what makes differentiation possible. Meet each child at their current developmental level. Then provide experiences that support growth toward the next stage. Milestones also help identify children who may need additional support. But only if you also hold the variation in mind. Otherwise every child on the late end of normal looks like a referral.

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Educational Psychology carries a NCCRS credit recommendation. These universities work with NCCRS; some are UPI Study's signed partners. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.

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FAQ

Questions students ask us

About Growing Up: What Changes and What Shapes Us

What are the four domains of human development?
The four domains of development are physical, cognitive, emotional and social. Physical covers body size, motor skills and neurological maturation; cognitive covers thinking, reasoning, memory and problem-solving; emotional covers feelings, their regulation, empathy and self-concept; and social covers relationships, norms and interpersonal skills. The domains interact, so progress in one can enable or constrain another, as when a child without emotional regulation cannot access cognitive work they are capable of.
What is the interactionist perspective on nature and nurture?
The interactionist perspective holds that development is the product of a dynamic, two-way interaction between genes and environment rather than one or the other. Genes set boundaries and tendencies, and environments shape how and when those tendencies are expressed. For example, a child with a genetic predisposition for mathematical reasoning realizes that potential only through suitable education, nutrition and emotional support. Most developmental psychologists now accept this view over the old either-or debate.
What is epigenetics and why does it matter for child development?
Epigenetics is the study of how environmental factors switch genes on or off without changing the DNA sequence itself. Early stress, nutrition and caregiver responsiveness have been shown to produce lasting changes in gene expression that affect cognitive and emotional development. This gives the interactionist view a biological mechanism, since the environment works through biology, and it supports investment in early education and stable, nurturing homes.
What is the difference between a sensitive period and a critical period?
A critical period is a window in which a development must occur or it will not occur at all, while a sensitive period is a window of heightened responsiveness that offers greater opportunity but not absolute necessity. Language is the best-documented sensitive period: children learn language with remarkable ease in the first decade, and second-language learning becomes more effortful after puberty. Learning later is harder, but it is not hopeless.

About the Educational Psychology course

How many college credits is Educational Psychology?
Educational Psychology (Psychology 120) carries a NCCRS credit recommendation for 3 semester credits. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.
How much does Educational Psychology cost and what is included?
$250, paid once, with lifetime access: all 100 video lessons, a practice quiz after each, the graded work and final exam, and an official transcript when you finish. Students who want several courses choose UPI Study PRO instead.
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How long does Educational Psychology take?
It is self-paced with no deadlines. The 100 lessons total about 15 hours of video; most students add reading and practice time and finish in a few weeks to a few months, on their own schedule.
How are the exams done?
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