This week, American actress Gwyneth Paltrow announced she is 'type one' on the Enneagram scale - a 'Reformer' - crediting the test with helping her to kick her cigarette habit.

Department of Biomedical Engineering, Medical School, Shenzhen University, Shenzhen 518060, China Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical ...