“…The bioecological model is able to encompass the impact of culture on the nature of sibling interactions and potential changes over time. In addition, other frameworks, such as the Resource Dilution model with its focus on the number of siblings in the family (Downey, 2001) and changing impact of this family characteristic (Zajonc, 2001), and the role of indirect influences are able to be encompassed (Nightengale, Yoon, Wolter-Warmerdam, Daniels, & Hickey, 2017), and to having comorbid autism spectrum disorder (see, Reilly, 2009 for a review). These individual characteristics are likely to have some impact upon the influence of siblings on certain outcomes but may occur in a very small number of study participants.…”