There are number of scales which measures EE in schizophrenia. You have to chose from them depending on your convenience(I mean time constraints, components of EE you want to measure, availability of scales in the public domain and the expertise to use the particular measurement). Some of the scales which you can look into are; Camberwell Family Interview(CFI), Levels of Expressed Emotions Scale(LEE), Family Emotional Involvement and Criticism Scale(FEICS), Family Attitude Scale (FAS) and Perceived Criticism Scale(PC).
We are not expert in CFI. LEE is 60 items but I could not find it on inter net. can you guide me for LEE or any shorter scale. A post graduate trainee needs some short scale of EE for use in the thesis. may be you can help?