Question

Arnold so easily remembers his old girlfriend's phone number that he finds it difficult to recall his new girlfriend's number. Arnold's difficulty best illustrates.

Answer 1

The answer is proactive interference.

Step-by-step explanation:

Interference is described as a difficulty for remembering caused by similar information which "gets in the way". Proactive interference occurs when old information impedes recalling more recent information.

In contrast, retroactive interference works the other way around: more recent information obstructs older information.