For the portion of the concept map depicted in Figure 4, model fit parameters are presented above in Table 2. RMSEA of .056 and CFI of .934 indicates that this model fits the data very well. In the light of this model, we can also conclude that spinal cord and brain have high correlation (.83), which was not projected in the concept map due to its hierarchical structure. In other words, data suggest that rather than a tree structure, cross-links between concepts are also possible and suggest a more web-like structure (Figure 5).