By testing additional words, we can observe that the function assigns a significantly higher value to the word "book" compared to the other words. This suggests that the function is selectively associating the concept of "book" with a value closer to 1.

To summarize the behavior of the function based on the tests performed, it seems that the function is selectively associating the concepts of "tree", "computer", and "book" with higher values. These concepts might represent the concepts that the function is most selective for.

[DESCRIPTION]: Based on the tests conducted, the function seems to be selective for the concepts of "tree", "computer", and "book". It assigns relatively higher values to words associated with these concepts, indicating a stronger association. However, it assigns relatively lower values to other words, suggesting a weaker or no association.