Tests designed to provide indications of whether someone is on the spectrum. This is not a substitute for a professional diagnosis but may give you an indication of whether might be autistic or have ADHD.
ASD (autism spectrum disorder) questionnaires
Autism Spectrum Quotient (AQ) – Psychology Tools
Autism signs and characteristics checklist for adults | The Spectrum
ADHD Questionnaires
Resources:
1-Autisim
Autism WA – Making a difference to the lives of people with Autism
The Spectrum | Everything you need to know about autism
Autism Awareness Australia – Empowering autism families
2-ADHD
ADDitude – ADD & ADHD Symptom Tests, Signs, Treatment, Support
Australasian ADHD Professionals Association [AADPA]
ADHD Foundation & Community in Australia
Attention deficit hyperactivity disorder – ADHD symptoms, causes and diagnosis | healthdirect
ADHD | What is ADHD & The Effects in Young People | headspace