This showed that preutilization plays a part in functional fixedness.
It also seemed to be the case for functional fixedness categorization studies as well.
British Dictionary definitions for fixedness
attached or placed so as to be immovable
not subject to change; stable: fixed prices
steadily directed: a fixed expression
established as to relative position: a fixed point
not fluctuating; always at the same time: a fixed holiday
(of ideas, notions, etc) firmly maintained
(of an element) held in chemical combination: fixed nitrogen
(of a substance) nonvolatile
(astrology) of, relating to, or belonging to the group consisting of the four signs of the zodiac Taurus, Leo, Scorpio, and Aquarius, which are associated with stability Compare cardinal (sense 9), mutable (sense 2)
(informal) equipped or provided for, as with money, possessions, etc