In this sense, to explain how to line up the information in IMRaD writing, the 'wine glass model' (see the pattern diagram shown in Fig.1) will be helpful (see pp 2–3 of the Hilary Glasman-deal ). As mentioned in abovementioned textbook, the scheme of 'wine glass model' has two characteristics. The first one is "top-bottom symmetric shape", and the second one is "changing width" i.e. "the top is wide and it narrows towards the middle, and then widens again as it goes down toward the bottom".