Some people are unable to arrange six matches to form four equilateral triangles because they fail to consider a three-dimensional arrangement. This best illustrates the effects of ________ on problem solving.

A) fixation
B) heuristics
C) framing
D) overconfidence

Fixation

The inability to see a problem from a new perspective, by employing a different mental set.

Heuristics

Mental shortcuts or rules of thumb that allow people to make decisions and solve problems quickly and efficiently, though not always perfectly accurate.

Overconfidence

The phenomenon where an individual's subjective confidence in their judgments is reliably greater than their objective accuracy.