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. Author manuscript; available in PMC: 2017 Mar 7.
Published in final edited form as: J Neurolinguistics. 2014 Jul 22;31:69–85. doi: 10.1016/j.jneuroling.2014.06.006

Figure 3.

Figure 3

Grain Size Dimensions. This figure illustrates three ways ‘grain size’ can be conceptualized. The mapping principle refers to the phonological unit that maps onto a single orthographic unit. The unit of instruction refers to the phonological unit that is the focus of attention in early stages of learning, which can be different than the mapping principle of a given writing system. The unit of representation for decoding refers to the phonological unit that is the building block for sounding out or decoding a word.