In medical studies, the efficacy of medical treatments (called interventions) is evaluated within a group of study participants. You will be given a sentence of a study report in which your task is to list the phrases that describe the intervention(s) of the study. You should list the phrase in the same order that they appear in the text, separated by commas. If no information about the interventions is mentioned, just answer with "not found". Interventions are: a specific drug, surgery, talking therapy, a lifestyle modification, control or placebo treatment. Do not include details, dosages, frequency and duration, intervention mentions that are not in an informative span of text.

[Q]: This study reports results of a randomized controlled trial aimed at joint attention ( JA ) and symbolic play ( SP ) in preschool children with autism , with prediction to language outcome 12 months later .
[A]: joint attention, symbolic play


[Q]: Teacher-report data also confirmed that children receiving the intervention made significant improvements in social functioning from pre- to post-treatment .
[A]: not found


[Q]: Social skills improvement in children with high-functioning autism : a pilot randomized controlled trial .
[A]:
not found