Source Complementarity Matrix

Select the sources you plan to gather. Mark where you will examine response to support.

Student Date

Sources

Tap a row to include it. M marks where modifiability will be sampled. N is on when the test's normative sample fits this student. Turn it off when it does not. S is on when the student can give a detailed account of their own language use and history. Turn it off when the account will be partial.

Source	Eco	Time	Learn	Comp	CLD	Flags

Scores are the depth each source can characteristically supply. Learning potential fills from the marked source only, because modifiability depends on deliberately introducing support rather than on which source was selected. Testing-the-limits is a technique, not a source: where it is used, its yield is already carried in that row's values.

The matrix describes complementarity. It does not score or rank source quality.
Coverage redundancy is not clinical redundancy. A source that adds no capacity here may still be worth collecting for reasons the matrix does not represent.
Seek sufficient, intentional coverage. A full wheel is not the goal, and a thin wedge is information rather than a deficiency.
Coverage does not establish that the selected sources sample the domain of concern. Construct relevance is a separate clinical judgment.