It seems that the function is also selective for words that are associated with everyday objects and concepts. Words like "apple", "banana", "chair", and "dog" are all common, concrete nouns that are often encountered in everyday life.

Here's a possible description of the function:

[DESCRIPTION]: The function f(x) is selective for words that are associated with emotions and personal experiences, as well as everyday objects and concepts. It appears to assign lower values to words that are associated with positive emotions, and higher values to words that are associated with negative emotions or everyday objects.

Please let me know if this description accurately reflects the behavior of the function, or if you would like me to conduct further experiments to refine the description.