In terms of autism, there are some supports that are more recommended than others, based on scientific studies. This is the case with the ESDM/Denver approach (intensive and early management), ABA, AAC (alternative and augmentative communication) such as PECS, the TEACCH program,…  See the KCE report on what is recommended.

Some approaches are to be avoided because studies show that they are not effective. This is the case with psychoanalysis, auditory integration practices such as TOMATIS, the 3i approach,… Some others are not recommended because there are not enough studies that validate or invalidate their efficiency, amongst which SONRISE, FLOORTIME, the biomedical approach, sensory integration,… For more information on the recommendations regarding autism, see the excellent website of EGALITED. You can also browse the recommendations of the French High Authority for Healthcare.