Table 2 Detailed search strategy pertaining to the key terms and number of results (as of 24/05/2023) for each database. The searches will be limited to studies published from 2014 to present (May 2023) and available in English language

MedLINE (1050)

1. exp Autistic Disorder/

2. exp Asperger Syndrome/

3. exp Autism Spectrum Disorder/

4. autis*.mp

5. asperger*.mp

6. pervasive developmental*.mp

7. 1 or 2 or 3 or 4 or 5 or 6

8. exp “Surveys and Questionnaires”/

9. exp Self Report/

10. measure*.mp

11. scale*.mp

12. questionnaire*.mp

13. inventory*.mp

14. exp Checklist/

15. checklist*.mp

16. schedule*.mp

17. instrument*.mp

18. assessment*.mp

19. survey*.mp

20. tool*.mp

21. exp Patient Reported Outcome Measures/

22. outcome*.mp

23. screen*.mp

24. diagnos*.mp

25. self-report*.mp

26. 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25

26. exp Psychometrics/

27. psychometric*.mp

28. measurement*.mp

29. valid*.mp

30. measurement invarian*.mp

31. measurement equivalen*.mp

32. differential item*.mp

33. dif.mp

34. 26 or 27 or 28 or 29 or 30 or 31 or 32 or 33

35. exp Adult/

36. adult*.mp

37. 35 or 36

Embase (3199)

1. exp autism/

2. exp Asperger syndrome/

3. autis*.mp

4. asperger*.mp

5. exp “pervasive developmental disorder not otherwise specified”/

6. pervasive developmental*.mp

7. 1 or 2 or 3 or 4 or 5 or 6

8. exp questionnaire/

9. exp self report/

10. measure*.mp

11. scale*.mp

12. questionnaire*.mp

13. inventory*.mp

14. exp checklist/

15. checklist*.mp

16. schedule*.mp

17. instrument*.mp

18. assessment*.mp

19. exp autism assessment/

20. exp clinical assessment/

21. exp clinical assessment tool/

22. exp psychologic assessment/

23. exp symptom assessment/

24. exp patient assessment/

25. survey*.mp

26. tool*.mp

27. exp patient-reported outcome/

28. outcome*.mp

29. exp screening test/

30. exp screening/

31. screen*.mp

32. diagnos*.mp

33. self-report*.mp

34. 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28 or 29 or 30 or 31 or 32 or 33

35. exp psychometry/

36. psychometric*.mp

36. exp validity/

37. measurement*.mp

38. valid*.mp      

39. measurement invarian*.mp

40. measurement equivalen*.mp

41. differential item*.mp

42. dif.mp

43. 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42

44. exp adult/

45. adult*.mp

46. 44 or 45

PsycINFO (1075)

1. exp Autism Spectrum Disorders/

2. exp Autistic Traits/

3. autis*.mp

4. asperger*.mp

5. pervasive developmental*.mp

6. 1 or 2 or 3 or 4 or 5

7. exp Questionnaires/

8. exp Surveys/

9. exp Self-Report/

10. exp Measurement/

11. measure*.mp

12. questionnaire*.mp

13. scale*.mp

14. inventory*.mp

15. exp “Checklist (Testing)”/

16. checklist*.mp

17. schedule*.mp

18. instrument*.mp

19. exp Psychological Assessment/

20. assessment*.mp

21. exp “Mental Health and Illness Assessment”/

22. survey*.mp

23. tool*.mp

24. exp Patient Reported Outcome Measures/

25. outcome*.mp

26. exp Screening Tests/

27. exp Screening/

28. screen*.mp

29. diagnos*.mp

30. self-report*.mp

31. 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28 or 29 or 30

32. exp Psychometrics/

33. psychometric*.mp

34. measurement*.mp

35. exp Test Validity/

36. exp Test Construction/

37. valid*.mp

38. exp Measurement Invariance/

39. exp Differential Item Functioning/

40. Dif.mp

41. measurement equivalen*.mp

42. measurement invarian*.mp

43. differential item*.mp

44. 32 or 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43

45. adult*.mp