Oddly Wired
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problem solving

You change your mind when you cannot use tools.

In a 1945 study, participants failed to solve problems because they could not stop seeing an object's 'intended' use.

When tasked to mount a candle on a wall using a box, people struggled because they viewed the box only as a container. Once you identify a tool’s primary function, your mind actively ignores other possibilities. Your flexibility collapses in the face of familiarity.

You are limited by the labels you assign to everyday objects.

Where this comes from

Study
Duncker, 1945, Psychological Monographs
What the check found
The attribution to Duncker (1945) and the core concept of functional fixedness are accurate. The 'candle problem' is the quintessential example of the concept introduced in that monograph.
Confidence
Well replicated

Related

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