Consider the following scenario:
A group of researchers is studying how people approach problem-solving tasks. They present participants with a complex anagram to solve: the letters 'AENRTPG'. After several minutes of deliberation, many participants successfully rearrange the letters into the word 'GERAPNT', while only a few manage to identify the correct response, 'PANTAGER'. This scenario illustrates challenges often encountered in problem-solving, particularly with respect to cognitive strategies.
Which cognitive phenomenon best describes the tendency of most participants to incorrectly focus on the initial arrangement and miss the uncommon but correct solution to the anagram?