Do bilingual people perform better on the Stroop test?

The Stroop-specific estimate is in Table 3. It is a standardized difference, not 12% better performance or an individual probability. The table's small unadjusted effect and the paper's bias-adjusted conclusion must be read together; selecting only the positive cell would misrepresent the review. Lehtonen et al., 2018

Why was an advantage proposed?

Managing more than one language provides an intuitively plausible reason to study cognitive control. But plausible mechanisms require direct evidence. Paap and Greenberg's empirical work questions whether several executive tasks provide coherent evidence for one bilingual advantage, rather than assuming a shared label makes their scores equivalent. Paap et al., 2013

The Stroop task itself also has several components. Words, colours, response mappings and the chosen baseline influence its cost. MacLeod's review and the clinical measurement review show why it cannot be reduced to a pure language-independent control meter. MacLeod, 1991 Scarpina et al., 2017

Does the test language matter?

A written word can interfere only through the processes it engages in the reader. The original task demonstrates the relevance of a familiar verbal response, while the reviews describe task-version differences. That supports preserving language and response conditions; it does not supply a single bilingual correction factor. Stroop, 1935 MacLeod, 1991

Group differences do not identify an individual

Even an observed small group difference would leave substantial overlap and would not explain why one person's score changed. The reliability-paradox study also shows that many classic task differences are less reliable for individual ranking than their robust experimental effects suggest. A short browser run cannot establish which language experience caused a result. Hedge et al., 2017

The adult synthesis does not establish universal age-by-age or sex-specific Stroop norms for bilinguals. Its conclusion should not be extended automatically to children, every language pair or every definition of bilingual experience. A different population requires its own appropriate evidence. Lehtonen et al., 2018

Why measurement and adjustment matter

Browser timing varies across systems, and Stroop scoring varies across test versions. Clinical meta-analytic work illustrates how the method used to quantify interference can change the apparent size of group effects. This is a general warning about measurement, not evidence that bilingualism is a clinical condition. Anwyl-Irvine et al., 2020 Lansbergen et al., 2007

What can you realistically infer from trying it?

Use the test as an experience of conflicting word and colour information. If comparing your own runs, keep language, device, response mode and scoring fixed. Read error rates together with response times and avoid interpreting a change as proof of a broad bilingual benefit. Scarpina et al., 2017 Hedge et al., 2017

The evidence does not argue against learning languages, nor does it make a cognitive-enhancement promise for doing so. It answers a narrower question: the cited adult literature does not provide robust support for a general executive advantage after accounting for publication bias. Specific language skills and the value of communicating in another language are separate outcomes. Lehtonen et al., 2018 Paap et al., 2013