Original sentence: Research has been done on the effects of this meditation technique on mind and body, ranging from investigating its effects on cardiovascular disease to studying the physiological and psychological correlates of "higher states of consciousness" which practitioners say result from its practice
Edited sentence: Research has been done on the effects of this meditation technique on mind and body, ranging from investigating its effects on cardiovascular disease to studying the physiological and psychological correlates of so-called "higher states of consciousness" purported to result from its practice