One of the difficulties with stress is that people experience stress in different ways. This contributes to stress manifesting itself in different ways also. So it would be wrong to over generalize when giving advice on how to identify stress and increased vulnerability in others. However, what we can say is that in some way, stress will out. By this we mean that because stress has negative effects, it will usually manifest itself one way or another. There are three sources of data you can observe and explore and early identification of stress related problems can be best achieved by reflecting on these sources of data.
Firstly, negative changes in the individual your perceptions are important Are you seeing or hearing negative changes or those changes sustained. Secondly, objective data related to the impact of stress on the team individual is the stress having an effect that is measurable or quantifiable, for example, on performance, absence, and so on. Thirdly, explore qualitative data. Others perceptions are also important. How do people describe their experience? data like these can come from chance remarks, one to ones or perhaps most importantly from team meetings.