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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: J Exp Child Psychol. 2009 Aug 18;104(4):410–426. doi: 10.1016/j.jecp.2009.07.003

Table 4.

Summary of Hierarchical Regression Analysis for Variables Predicting Use of Bigrams by Prephonological Spellers in English and Portuguese

English Portuguese
Variable B SE B β p B SE B β p
Step 1
     First letter frequency 0.163 0.024 0.256 .000 0.116 0.012 0.291 .000
     Second letter frequency 0.156 0.024 0.245 .000 0.110 0.012 0.276 .000
Step 2
     Bigram frequency 0.071 0.012 0.259 .000 0.179 0.013 0.426 .000

Note. For English, R2 = .272 for Step 1; ΔR2 = .038 for Step 2 (ps <.001). For Portuguese, R2 = .401 for Step 1; ΔR2 = .127 for Step 2 (ps <.001).