Data management
WL
Measures with < 20% of missing items had total scores imputed based on averaged responses from answered items (occurred in < 5% of cases). Any measure with > 25% missing items was treated as a missing value for a participant (< 5% of cases).WL Time 2 assessments served two purposes. These were used for comparison with Time 2 AP and AE data and also used as pre-group attendance baseline scores (i.e., effectively “Time 1”) to examine any changes post-AP or -AE group in former WL participants.