If you have found a fitting instrument that measures your interest and has been validated but is a bit too long, what can you do to shorten it?
How do you reduce the number of questions within a questionnaire/instrument not the variables? As in, are there any set procedures that one needs to follow. The questionnaire in queestion is the Academic Self-Regulated Learning Scale (Mango 2010). The aim is to reduce it 20 -25 questions.