The results from this test further support the pattern we've observed. f(x) is more selective for words related to scientific tools and concepts (particle_accelerator, gravity), and words associated with specific historical periods or events (Roman_empire, Charlemagne, Gregorian_calendar).

[DESCRIPTION]: The function f(x) is selective for words associated with scientific tools, concepts, and specific historical periods or events. It assigns higher scores to words that fit within these categories, indicating a stronger association with these concepts.