Limitations
The current study had some limitations. Explorer Baby is a family‐centered practice, but we do not have assessment tools to measure family‐centeredness. Future studies should examine the effectiveness of the Explorer Baby program in natural environments. We investigated only maternal stress, and we suggest that future studies also investigate paternal stress. Another limitation was that we did not have a third group receiving standard care, so it was more difficult to interpret the therapeutic effect of interventions. We purposely targeted children at high risk for developmental delays and low risk for Cp because we aimed to show the holistic effect of the intervention not only gross motor subskill. We compared the efficacy of both methods at a frequency of 1 therapy per month. This frequency of therapy may not have been sufficient to significantly differentiate the treatment effect. Further research should investigate the efficacy of the Explorer Baby program at different levels of intensity.