독해를 하고 있는데 여기서 on line 이라는 것을 어떻게 해석해야할지 모르겠습니다. 또 forty-four 5-month-olds를 44-45개월의 유아라고 해석해야하는지 전반적으로 해석이 헷갈려서 문의 드립니다. 빠른 답변 부탁드립니다.
밑줄친 부분이 주로 해석이 안되는 부분입니다!!! ㅠㅠ

what processes do infants employ in categorizing? infants might categorize on line as they
encounter category-related entities; alternatively, infants might depend on prior experience with
entities in formulating categories. these alternatives were tested in forty-four 5-month-olds.
infants who were familiarized in the laboratory with a category of never-before-seen objects
subsequently treated novel objects of the same category as familiar -- they categorized on line --
just as did infants who were exposed to objects from the same category at home for 2 months
leading to their laboratory assessment of object categorization. infants with home experience also
recognized novel category objects as familiar from the outset – that is, prior experience with
category exemplars was brought to bear in laboratory tasks.