Qualitative content analysis of documents relating to different time periods corresponds to which of the following research designs?

ACross-sectional

BLongitudinal ✓ Correct

CCase study

DComparative

Correct answer: (B) Longitudinal

Explanation

Content analysis of documents from different time periods matches a longitudinal design.

It traces change and continuity across successive points in time.

Cross-sectional design examines many cases at a single time point.

Case study design intensively explores a single bounded case.

Comparative design contrasts cases or contexts to reveal differences.

Documents here serve as a non-reactive, unobtrusive data source.

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