“…Variability in maternal sensitivity is situated at the forefront of explanations for inter-and intraindividual differences in the quality of children's attachment relationships (Ainsworth et al, 1978(Ainsworth et al, /2015Bowlby, 1969Bowlby, /1982 and subsequent developmental outcomes. To date, a robust body of empirical work has validated the role that sensitivity plays in promoting children's developmental outcomes (e.g., Raby et al, 2015) and confirms that changes over time in sensitivity predict related changes in child outcomes such as attachment security (e.g., Posada et al, 2018). Of particular interest to developmentalists then is how sensitivity might vary as a child ages.…”