The subjects GUI lists subjects and raw data.

1) The left panel shows subjects, and gives access to adding and editing subject information.

2) The right panel shows the raw data ('studies") collected for the selected subject.

3) There are options to view or load covariates, and "metrics"

A covariate is linked with a particular subject; a metric is a type of raw data (B) and is recorded, and can be analyzed separately. Metrics may include repeated measures. For cross-sectional studies, the distinction is not that important.

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