Complex sentence: Studies have shown that there is dissociation between provoked confabulation, spontaneous confabulation (which is unprovoked), and false memories; that is, patients could be led to believe certain things that haven't happened, just like people without Korsakoff's syndrome.
Split into simpler sentences: Studies have shown that there is dissociation between provoked confabulation, spontaneous confabulation (which is unprovoked) and false memories. That is, patients could be led to believe certain things that haven't happened, just like people without Korsakoff's syndrome.