Early intervention is a research concept and applied methodology focused on the timely identification of potential risks, developmental delays, or emerging challenges in individuals or systems, followed by the implementation of targeted supports or services. This field investigates the efficacy, timing, and mechanisms of proactive measures designed to mitigate negative trajectories, optimize developmental pathways, or prevent the escalation of problems, emphasizing the critical importance of addressing issues at their earliest detectable stages to improve long-term outcomes and reduce the need for more intensive future interventions.