This document discusses autism interventions and how to determine which ones can be trusted. It notes that interventions are confusing due to the range of options and purposes. Understanding the evidence is also difficult due to limitations in research. The document recommends considering principles like safety, effectiveness and respecting individual needs. It suggests asking questions about claims and watching for "red flags" like lack of evidence or promises of cures. Sources like NICE and Research Autism are presented as providing reliable guidance on interpreting evidence on autism interventions.