S4 removed the diagram and changed the title to "Path Coefficients". They also updated the content by making it a definition for Path Coefficients. They cited the redundancy of having two of the same diagrams as their reasoning. They also changed the concept's parent node from "S Wright's Guinea Pigs and the 'First link of Causality and Probability'" to "The path diagram for inheritance of fur color in guinea pigs" to improve the hierarchical organization. 

Example of node evolution for path coefficient example (picture 3)

S3 added a reference and explained that they "Don't want to plagiarize". They also changed the textual content to the reference.

University of Michigan - Ann Arbor

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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