. 2018 Mar 8;9:291. doi: 10.3389/fpsyg.2018.00291

Table 1.

Osterlind indexes obtained for each item in representativeness (REP), relevance (REL), utility (U), and feasibility (F).

Item^a	REP	REL	U	F
DIMENSION 1. EXTRINSIC CHARACTERISTIC
1. Publication type	0.90	0.93	0.94	0.93
DIMENSION 2. OBJECTIVES DELIMITATION
2. Problem delimitation, sport	0.77	0.93	0.84	0.85
3. Problem delimitation, general objectives	0.93	1	0.95	0.93
4. Problem delimitation, specific objectives	0.93	0.90	0.88	0.85
5. Reference to theoretical framework	0.71	0.81	0.79	0.74
6. Specification of response levels	0.82	0.83	0.80	0.78
7. Specification of participation degree	0.70	0.76	0.70	0.73
DIMENSION 3. OBSERVATIONAL DESIGN
8. Specification of observational design for each objective	0.86	0.83	0.93	0.90
9. Justification of the observational design	0.81	0.79	0.73	0.73
10. Sequence data are obtained	0.50	0.79	0.70	0.60
DIMENSION 4. PARTICIPANTS
11. Age	0.50	0.58	0.66	0.66
12. Cultural background	0.34	0.21	0.33	0.33
13. Socio-economic level	0.30	0.36	0.33	0.28
14. Sport modality	0.55	0.64	0.65	0.80
15. Professionalism	0.60	0.62	0.60	0.58
16. Global exclusion of participants	0.66	0.68	0.58	0.60
17. Differential exclusion of participants	0.57	0.40	0.42	0.52
18. Participants' allocation	0.57	0.50	0.42	0.40
19. Activity type	0.68	0.62	0.68	0.75
DIMENSION 5. CONTEXT (SETTING)
20. Place (location)	0.61	0.62	0.63	0.83
21. Social impact of the activity	0.59	0.52	0.53	0.63
22. Time frame	0.66	0.67	0.73	0.75
23. Session acceptance criteria	0.68	0.64	0.70	0.65
24. Number of non-observable periods	0.66	0.55	0.55	0.45
25. Duration of non-observable periods	0.73	0.71	0.75	0.73
26. Total results indication	0.73	0.69	0.65	0.68
27. Partial results indication	0.59	0.69	0.65	0.63
28. Observational unit adjustment	0.61	0.69	0.65	0.60
29. Observational units delimiting, denominating and definable	0.70	0.71	0.73	0.68
30. Global/molecular units' degree justified	0.91	0.95	0.93	0.88
DIMENSION 6. OBSERVATIONAL INSTRUMENT
31. Type of observational instrument	0.86	0.79	0.82	0.73
32. Instrument appropriate to the design	0.80	0.74	0.68	0.75
33. Justification of instrument type according to the observational design	0.66	0.69	0.65	0.68
34. Criteria that led to the catalogs and categories systems	0.64	0.43	0.55	0.50
35. Requirements to categorize from a certain criterion	0.64	0.60	0.55	0.63
36. Availability of full coding manual	0.80	0.79	0.68	0.75
37. Observational instrument adequate to the study context	0.75	0.74	0.75	0.78
DIMENSION 7. RECORDING INSTRUMENT
38. Software utilization as user	0.70	0.68	0.70	0.65
DIMENSION 8. DATA
39. Software type used to record	0.68	0.64	0.63	0.70
40. Observational recording	0.80	0.81	0.75	0.80
41. Software used to record	0.91	0.93	0.98	0.93
42. Software used for data quality control	0.91	0.90	0.93	0.90
43. Software used for data analysis	0.82	0.83	0.85	0.83
44. Type of data according to Bakeman (1978)	0.75	0.62	0.68	0.75
45. Type of data according to Bakeman (1983)	0.70	0.60	0.55	0.65
46. Data management	0.66	0.60	0.53	0.53
DIMENSION 9. PARAMETER SPECIFICATION
47. Parameter type (the most complex)	0.64	0.52	0.55	0.50
48. Parameter fitting (the most complex)	0.48	0.48	0.45	0.53
DIMENSION 10. OBSERVATIONAL SAMPLING
49. Observational period	0.75	0.57	0.68	0.74
50. Sessions periodicity	0.75	0.60	0.70	0.73
51. Number of sessions	0.86	0.71	0.78	0.74
52. Starting session criterion	0.75	0.76	0.68	0.68
53. Ending session criterion	0.80	0.74	0.73	0.78
54. Within-session sampling	0.70	0.57	0.65	0.58
DIMENSION 11. DATA QUALITY CONTROL
55. Agreements	0.67	0.60	0.58	0.50
56. Concordance	0.93	0.93	0.90	0.85
57. Within-session reliability	0.86	0.79	0.80	0.75
58. Between-session reliability	0.84	0.76	0.78	0.75
59. Generalizability theory application	0.76	0.70	0.71	0.66
DIMENSION 12. DATA ANALYSIS
60. Data analysis developed	0.98	0.90	0.89	0.89

REP, representativeness; REL, relevance; U, utility; F, feasibility. One item is considered appropriate when the values obtained in the four aspects measured (REP, REL, U, and F) are at least 0.5. We marked the Osterlind indexes under 0.5 and removed the items in bold text.

Items appear in abbreviated form; the full items can be consulted in Appendix I (Spanish version in Supplementary Material).