Based on the tests conducted, the function f(x) seems to be highly selective for words related to politics and social sciences. Most words in this category have higher output values, indicating a stronger association with the concept.

[DESCRIPTION]: The function f(x) appears to evaluate the association strength of input words with the concept of politics and social sciences. Words that have a strong connection to these concepts receive higher output values (closer to 1), indicating a higher selectivity for these concepts.