Psychological Nutrients

What it is

Deci and Ryan define the three needs as innate psychological nutriments in their 2000 paper on the what and the why of goal pursuits, published in Psychological Inquiry, and that is where the food analogy starts. Deci is first author. Self-determination theory itself is a large and well-supported framework, and the finding that satisfying the three needs predicts wellbeing holds up across cultures.

Eyal's addition is a deficit account of substitution. Starve any of the three and the person goes looking for a supplier, and the most reliable available supplier is usually a product engineered to deliver on exactly those dimensions. That is a plausible and interesting claim, and it has not been tested.

In effect

The parenting application is the sharp end of it. Eyal argues that children's technology overuse is a needs deficit rather than a screen problem. Standardised testing crowds out felt competence, so a game that levels you up every ninety seconds supplies it instead. Adult-managed schedules crowd out autonomy. The decline of unstructured play crowds out relatedness.

The evidence he leans on hardest needs restating carefully, because its scope is narrower than the use he puts it to. Correa-Chávez and Barbara Rogoff published in Developmental Psychology in 2009 on Guatemalan Mayan and European American children's attention to interactions directed at others, with forty children per group. What they measured was attention to an activity directed at a sibling who was being taught, not general sustained attention. Mayan children from traditional families sustained attention in roughly twice as many observed segments as the European American children, and Mayan children with less exposure to Western schooling did better still. Rogoff's own hedge survives in Eyal's text, that children may give up control of their attention when it is always managed by an adult. The study is about observational learning, not about screen time.

The memorable comparative figures on how restricted teenagers are relative to adults, service personnel and prisoners come from Robert Epstein's own survey reported in a trade book. They are not peer reviewed and are not cited here.

What it does not say

It does not say that products cause the deficit. The claim is about substitution, and the direction of causation between an unmet need and the behaviour that fills it is exactly what has not been tested.

It does not carry the self-determination evidence across to the deficit account. Need satisfaction predicting wellbeing is well supported. Apps filling a need vacuum is an interpretation.

It does not say that the attention study is about screens. It measured observational attention to a third party in a teaching situation, and the sample was eighty children in total.

It does not supply the teenage-restriction comparisons as data. They come from an unrefereed survey and are not printed here.

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