Peterson points out, however, that the committee does not explore the available evidence to see whether a causal connection is probable or propose an experimental research design that could demonstrate whether such a connection exists. (educationnext.org)
On the other hand, when conditions can be controlled in order to focus on a single variable, experimental research design is used to determine causation. (tes.com)
Fellows will complete coursework in quantitative methodology, experimental research design, and education policy. (gse.harvard.edu)