I am very new to SPSS so pardon the basic nature of my query. Currently doing my PhD. I have three cohorts of participants and I have set up three separate SPSS worksheets (one for each participant). I thought that this might be more straight-forward (for some reason!) but now think that it would be better (form an analysis perspective) if all three cohorts of participants were in the one worksheet/dataset. I haven't entered any data yet. Is there a way to, in effect, copy and paste two of the datasets/worksheets into the third to make one or to merge the three worksheets into one?