Children often have difficulty remembering the letters in the middle of the alphabet because of

the serial position effect

Explanation:

Experiments show that when participants are presented with a list of words, they tend to remember the first few and last few words and are more likely to forget those in the middle of the list.

This is known as the serial position effect. The tendency to recall earlier words is called the primacy effect; the tendency to recall the later words is called the recency effect.

can you explain it better

answer; severe;