“One of the most frequent problems in groupwork is that not everyone puts the same amount of effort into the task. Group members may have a different work ethic or standards for the quality of their work, and this will probably result in different levels of commitment to the group work. While different levels of commitment to the task could be partly influenced by individual workloads, there are wider factors such as individual attitudes to study. Another aspect of the same problem, however, is where one member chooses to do more work than the others. An overeager member can be irritating to the other members who then reduce their commitment to the work leaving the overeager member to get on with most of the work.”
When I rewrite the underlined part above into “Another aspect of the same problem is the case where (or, ‘in which’) one member chooses to do more work than the others.”, my question is as follows;
1) is it right that the seemingly proceding noun – ‘the case’ has been dropped in this 'formal' sentence?
2) if so, can such proceding nouns as ‘the case, situation, circumstance, point, etc.’ (not ‘place’) be often dropped in informal style only, while I remember Swan wrote in 'Practical English Usage', 3rd edition, page.498 ”After common nouns referring to time, ‘when’ is often replaced by ‘that’ or dropped in an informal style. The same thing happens with ‘where’ after ‘somewhere, anywhere, everywhere, nowhere and place’ (but not after other words).
Your reply would be much appreciated.