One week following their assessment (time 3), participants will receive another SMS/email which will include a hyperlink to a post-assessment survey that will ask participants to rate their satisfaction with the assessment and whether they received a diagnosis of ASD. Participants who do not complete this questionnaire after one week will be contacted one final time. Participants with missing data from this time-point will not be excluded from the study as their data from the first two time-points will still be valid for testing the primary hypothesis. The ASD assessment service will be asked to confirm whether or not the participant (with data missing at time-point 3) received a diagnosis of ASD (which is covered in the consent form). All participants will be sent a debriefing sheet.