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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Infant Behav Dev. 2015 Mar 11;39:67–80. doi: 10.1016/j.infbeh.2015.02.003
Infant’s Age in Months 8 9 10 11 12 13 14
p .000* .000* .000* .000* .000* .000* .000*
Total n 279 283 287 292 292 290 280
df 2 2 2 2 2 2 2
Pearson Chi-Square 53.92 67.63 55.40 48.89 44.30 34.31 28.42
Note.
*
Significant at the corrected Bonferroni multiple comparisons level of .007.