What term relates to the tendency to forget the middle items of a list?

The term that relates to the tendency to forget the middle items of a list is the serial position effect. This phenomenon, observed in cognitive psychology, describes how people tend to have better recall for items at the beginning (the primacy effect) and the end (the recency effect) of a list, while items in the middle are often less memorable and more likely to be forgotten. The serial position effect illustrates how the position of an item in a sequence can significantly impact our ability to remember that item, highlighting the different cognitive processes involved in memory retention based on an item's location in a list.