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How long do you have to study an intervention to see if it works? Many scientists agree that it isn’t just about what happens in the short run, but if those interventions can be sustained for long periods of time. In the case of very early interventions, it is now clear that treatment for about a year can change the trajectory of symptoms so those improvements are sustained, maintained or lead to even further improvements for 6 years after the initial intervention has stopped. This important finding was hidden by the BBC getting the headline wrong and hiding the true value of the research at the end of the story. This week’s podcast outlines the contribution of parent-implemented intervention and research studying autism even before symptoms emerge in improving trajectories rather than just immediate outcomes. Happy Halloween!