Human development

Why a therapist needs this

Most of the work you will do rests on one quiet judgment: is this within the normal range? A seven-year-old who won’t sleep alone, a nineteen-year-old who changes majors three times, a sixty-eight-year-old who keeps losing keys. Each could be ordinary or the first sign of something, and the answer depends on age, family and culture.

Development courses give you that baseline. They also explain why the same problem looks different across life: depression in a child often shows as irritability rather than sadness, and anxiety in an older adult can look like a physical complaint. You will meet this again in psychopathology and the DSM, which organizes its chapters roughly by the age at which conditions tend to begin.

The lifespan at a glance

Graduate courses usually teach three classic frameworks side by side. Pick a stage to see how they line up, and where you are likely to meet that stage in practice.

Attachment: the lens you will use most

John Bowlby proposed that infants are built to seek closeness to a caregiver for safety, and that early experiences of that closeness shape what we expect from relationships later. Mary Ainsworth tested it with a laboratory procedure called the Strange Situation, watching how one-year-olds responded when a parent left the room and came back.

Secure

Most common

Upset when the parent leaves, comforted on return, then back to play. Expects that care will come.

Avoidant

Insecure

Seems unbothered by leaving and returning. Has learned to keep needs quiet.

Anxious (resistant)

Insecure

Very distressed, hard to soothe, clings and pushes away at once. Unsure care will come.

Disorganized

Added later

No consistent strategy; freezing or contradictory behavior. Described by Main and Solomon, often linked to frightening care.

In practice, attachment ideas inform couples therapy (several major models are built on them), parenting work, and how you think about the therapy relationship itself. One caution worth taking early: adult attachment “styles” are useful language, not a diagnosis, and a person’s pattern can change with new relationships.

The family life cycle

Families move through predictable transitions: coupling, a first child, children starting school, adolescence, launching young adults, later life. Betty Carter and Monica McGoldrick described how symptoms often appear at these joints, when the family has to reorganize and hasn’t yet. A child’s school refusal that begins the month a grandparent moves in is a family life cycle question as much as an individual one.

This is the core developmental lens of marriage and family therapy, and the reason MFT exams ask about it. Counselors and social workers use it too, and social work adds the wider ecology: school, neighborhood, income, policy. Urie Bronfenbrenner’s ecological model, with the child at the center of nested systems, is the usual diagram.

How it shows up on the exams

How to get ahead

• Make one sheet. Stages down the side, Erikson, Piaget, attachment and family life cycle across the top. Most exam questions draw from that grid.
• Learn the milestones that matter clinically: language, toileting, separation anxiety, puberty, and the ages at which common conditions usually first appear.
• Ask the developmental question in every case during practicum: what is normal for this age, this family and this culture?
• Read one original source. Ainsworth’s or Bowlby’s own writing, or Arnett’s paper on emerging adulthood, sticks better than a textbook summary.

Three clients, one question

Myths worth dropping