Oddly Wired
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perception

Common tools often become invisible when you need new uses.

A 1945 study found that participants struggled to solve problems when the necessary tools were already being used for their intended purpose.

The mind gets locked into the 'fixed' function of an object. To see a new use, you have to mentally 'deconstruct' the object and ignore what it was designed to do.

The more you know an object, the less you see its potential.

Where this comes from

Study
Karl Duncker, 1945, Functional Fixedness
What the check found
Karl Duncker coined the term 'functional fixedness' in his 1945 monograph 'On Problem-Solving,' where he demonstrated how prior knowledge of an object's intended use hinders an individual's ability to use it in a novel way.
Confidence
Well replicated
perceptioncognitionproblem-solving

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.