S12 added a reference for the node shortly after. They explained that they did not know the location of the reference at the time they created the node in their reasoning.

Example of node evolution for Causal Junctions (pic 2)

S12 created a node titled "The 3 Causal Junctions in Bayesian Networks" that provided a brief description and listed the three junctions found in Causal Diagrams. 

University of Michigan - Ann Arbor

The ability to improve nodes over time improved the quality of the nodes greatly. This allowed users to fix duplicate nodes, add references where needed, improve definitions and explanations, add diagrams or deleted unnecessary ones, and more.

Do we see any benefits in the evolution of these nodes (related to the path diagram technology study) over time, or the very first proposal for each of them was helpful enough and the evolution did not help that much? (5)

S3 created a node with an image and titled it "S Wright's Diagram". S3 did not add any reference or textual content on the node.

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