Concept | Measurement (items)a | Time pointsb | |||
---|---|---|---|---|---|
T0 | T1 | T2 | T3 | ||
Inclusion/exclusion criteria | Â | Â | Â | Â | Â |
  Clinical level of psychopathology | BSI-18 (18) | x |  |  |  |
  Experience with PST/MI | - | x |  |  |  |
Primary outcome measure | Â | Â | Â | Â | Â |
 Functional athletic behavior | Ambulatory assessment |  | x | x | x |
Secondary outcome measures | Â | Â | Â | Â | Â |
 Psychological variables |  |  |  |  |  |
  State anxiety | CAI-S (scales cognitive and somatic anxiety, 8) |  | x | x | x |
  Cognitive interference | TOQS (17) |  | x | x | x |
  Negative outcome expectation | CAI-S (confidence scale inversed, 4) |  | x | x | x |
 Athletic performance |  |  |  |  |  |
  Objective measures | E.g., win/lose, points scored |  | x | x | x |
  Subjective measures | Self-rated measures of performance |  | x | x | x |
Mediators | Â | Â | Â | Â | Â |
  Use of psychological skills | TOPS (scales self-talk, imagery, goal-setting, relaxation and activation, 20) |  | x | x | x |
  Ability to control thoughts and emotions | TOPS (scales negative cognitions and emotional control, 8) |  | x | x | x |
  Mindfulness | FFMQ-SF (24) & AMQ (16) |  | x | x | x |
  Acceptance of (unpleasant) experiences | SEC-27 (acceptance scale, 3) & AAQ-II (inversed, 9) |  | x | x | x |
  Defusion | EQ (decentering scale, 7), DSS (12) |  | x | x | x |
  General attention | ANT |  | x | x | x |
Moderators | Â | Â | Â | Â | Â |
  Task difficulty | - |  | x | x | x |
  Importance of game/competition | - |  | x | x | x |
  Demographic characteristics | - | x |  |  |  |
  Task- & ego-orientation | TEOSQ (13) |  | x |  |  |
  Self-esteem | RSC (10) |  | x |  |  |
  Self-compassion | SCS short form (12) |  | x |  |  |
Common factor & practice time | Â | Â | Â | Â | Â |
  Athletes’ expectancy of the intervention | - (3) |  | x |  |  |
  Practice time | Practice sheets |  |  | x | x |