An example dataset with the 2/1 partially nested design where the clustering is induced by treatment delivery. The example was based on the public-use data of the National Center for Research on Early Childhood Education Teacher Professional Development Study (2007-2011; for details about the study, see this [website](https://www.childandfamilydataarchive.org/cfda/archives/cfda/studies/34848/versions/V2)). The participants were assigned to either the treatment or control arms. The treatment arm was a one-on-one, web-mediated consultancy intervention in which the participants received online coaching from one of J = 12 coaches; that is, each coach represents a cluster in this example. The control arm participants had no such clustering.
partially_nested_data_exampleA data frame with 308 rows and 8 variables:
The outcome variable, measuring the instructional support quality after the intervention program.
Coach (i.e., cluster) assignment for participants in the treatment arm.
Treatment assignment. 1 for participants assigned to the treatment arm to receive the intervention program. 0 for participants assigned to the control arm. The control arm is unclustered.
Baseline covariates.
Baseline covariates.
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Participant id.