Table 46 Sept 2026From “What is external validity? A result needs a transfer boundary”

How should a team review a transfer claim?

Table 4How should a team review a transfer claim?

Pattern	First question	Smallest honest verdict
Same source objects and setting, new sample	Was the source design repeated without changing the estimand?	Replication candidate
New population with measured source-target overlap	Are the variables that modify the effect observed in both populations?	Transport may be analyzable under stated assumptions
New treatment implementation	Is the target intervention equivalent in the causal sense, not only in its label?	New treatment evidence required
New outcome or horizon	Does the target event measure the same construct at the same time boundary?	Do not infer the target outcome from the source result
New context or institution	Could the mechanism change with regulation, channel, language, or time?	Context bridge required
Similar label with no comparison record	Which fields are actually matched, and which are assumed?	Analogy only
Target data or overlap missing	Can the target claim be evaluated with the available design and data?	Not identified

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Source: Table from this essay. Sources and interpretation are given in the article.

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From the essay

From the research bench

What is external validity? A result needs a transfer boundary

External validity asks whether a result transfers across a named population, treatment, outcome, and context. Name the target before generalizing.

6 Sept 2026

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Isoglu, S. (2026). How should a team review a transfer claim? [Table]. isoglu.com. https://isoglu.com/insights/exhibits/isoglu-2026-what-is-external-validity-fig05/

BibTeX

@misc{isoglu-2026-what-is-external-validity-fig05,
  author = {Isoglu, Sinan},
  title = {{How should a team review a transfer claim?}},
  year = {2026},
  howpublished = {Table 4, isoglu.com},
  url = {https://isoglu.com/insights/exhibits/isoglu-2026-what-is-external-validity-fig05/},
  note = {From the essay {What is external validity? A result needs a transfer boundary}}
}

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  <figcaption>Table 4: How should a team review a transfer claim?. Source: Table from this essay. Sources and interpretation are given in the article. <a href="https://isoglu.com/insights/exhibits/isoglu-2026-what-is-external-validity-fig05/">View exhibit</a>.</figcaption>
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