English to Spanish Science Education / Pedagogy Acquisition of basic literacy skills

Buenas noches,

La consulta a continuación es porque no estoy seguro si la palabra consultada, valga la redundancia, está mal escrita:

Because the tests associated with these programs are intended to measure trends in literacy achievement for cross-country comparisons, they require long-term development processes, local ++language complications++ and complex scaling/scoring procedures.

Additionally, every one of these assessments requires basic reading ability (i.e., the assessment is based on passage reading), which may limit the usefulness and appropriateness for measuring early grade reading skills in developing countries (due to major floor effects).

Desde ya, agradezco sus aportes.