Pretend play, what it indicates
Around age two, a child starts treating a stick as a telephone. That conduct is a solid marker; what it produces is far less established.
Its appearance
Pretend play appears in the second year and grows more complex afterwards: object substitution, attribution of absent properties, then multi-role scenarios from three or four. Piaget had described it under the name of symbolic play and saw it as one of the manifestations of the symbolic function, alongside deferred imitation and the beginnings of language.
Its sequence of appearance is regular and found in the contexts studied, even where the props differ greatly. Its content, by contrast, closely reflects the activities observable around the child.
What it requires
Pretending requires holding two representations of the same object simultaneously, what it is and what it stands for, without confusion. That dual representation was analysed by Alan Leslie as early as 1987 as a precursor of mental state attribution. A child who gives a doll a drink from an empty cup knows the cup is empty, and it is precisely that knowledge which makes the play possible.
The hypothesis of a link with theory of mind rests on that logical kinship. Correlational data support it weakly, and the few intervention studies have produced no clear result.
The debate about effects
Angeline Lillard and colleagues published in 2013 a systematic review of work claiming that pretend play causes cognitive, linguistic or social progress.
Their conclusion is that evidence of a causal effect is weak, that positive studies often show control flaws, and that the hypothesis of a mere developmental marker, rather than a driver, is not ruled out.
The review does not claim that pretend play has no effect. It observes that the available studies do not make it possible to demonstrate one, which leaves open the possibility of an effect that better-controlled protocols have not yet measured.
Cultural variation
The frequency and form of pretend play vary sharply by context, notably according to whether adults take part. In several societies studied, play takes place among children, without adult participation. Ethnographic accounts also report settings where adults set little value on such play, without its appearance in children being prevented.
Those observations invite a distinction between what is universal, the appearance of the conduct, and what is local, its form and the role adults take in it.
What observation allows
The absence of pretend play at an age where it is expected is among the signs retained in developmental screening tools, in combination with other indices and never on its own.
That is the main established use of this observation: a clinical indicator among others, rather than a lever to act on for a measurable effect. The difference between those two statuses, sign or cause, is the one that runs through the whole literature on the subject.
Key points
The sequence of appearance is regular; the content of play reflects the observable environment.
The 2013 review concludes that evidence of a causal effect on development is weak.
The absence of pretend play is a clinical screening sign, never taken in isolation.
This article describes documented mechanisms and disagreements. It recommends no position, no party and no vote, and commits to no reading other than that of the work it cites.
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