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. Author manuscript; available in PMC: 2023 May 11.
Published in final edited form as: Sleep Med. 2019 Jul 27;65:74–83. doi: 10.1016/j.sleep.2019.07.017

Figure 4. Johnson-Neyman region of significance test of the association of objective WASO with the trajectory of maternal sensitivity across the mother–infant interaction.

Figure 4.

Notes. Slope of maternal sensitivity is the estimated slope of maternal sensitivity across the free play interaction. WASO is wake time after sleep onset measured by actigraphy. The Johnson-Neyman region of significance test provides the value of the moderator (WASO) at which the slope of the predictor (the effect of time during the free play interaction on maternal sensitivity) becomes significant at α=.05. The trajectory of maternal sensitivity was significantly negative for mothers who spent approximately 52 or more minutes awake after sleep onset.