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. Author manuscript; available in PMC: 2020 Aug 26.
Published in final edited form as: Sci Stud Read. 2019 Jun 24;23(6):523–532. doi: 10.1080/10888438.2019.1620749

Table 3.

Fixed Effects and Variance Estimates Predicting Logit Word Reading Responses on Words on Set for variability Task

Unconditional Model Main Effects Interaction Model
Fixed Effects Parameter Est. (SE) z p Est. (SE) z p Est. (SE) z p
Intercept (γ000) .610 (.349) 1.751 .080 .302 (.185) 1.635 .121 .252 (.197) 1.280 .200
Item covariate
 γ001 Set for variability — — — — 1.035 (.118) 8.766 <.001 1.031 (.119) 8.688 <.001
Child covariates
 γ002 Phonological Awareness — — — — −.002 (.020) .077 .939 −.002 (.021) .098 .922
 γ003 Rapid Letter Naming — — — — −.017 (.019) .863 .388 −.018 (.020) .896 .370
 γ004 WASI Vocabulary — — — — .009 (.017) .557 .577 .010 (.017) .574 .566
 γ005 Sight Word Efficiency — — — — .068 (.009) 7.516 <.001 .069 (.009) 7.514 <.001
 γ006 Set for variability (Total) — — — — .065 (.013) 5.035 <.001 .065 (.013) 4.920 <.001
Word covariates
 γ007 SPTR — — — — −.887 (.227) 3.907 <.001 −.873 (.229) 3.815 <.001
 γ008 Length — — — — .315 (.154) .875 .382 .149 (.155) .958 .338
 γ009 Frequency — — — — .161 (.028) 5.743 <.001 .161 (.028) 5.697 <.001
 γ010 Concreteness — — — — .362 (.189) 1.916 .055 .365 (.191) 1.912 .056
Interactions
 γ011 SWE × SPTR — — — — — — — — .016 (.004) 3.520 <.001
Variance Variance Variance Explained
Intercepts
 Word 3.389 1.091 67.81%
 Child 3.579 .746 79.16%

Note. SWE= Sight Word Efficiency; SPTR=Spelling to Pronunciation Transparency Rating