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Table 3 Summary of adherence to Linacre’s (2002a) guidelines for the 9-point rating scales

From: Post hoc evaluation of analytic rating scales for improved functioning in the assessment of interactive L2 speaking ability

Rating scale Category observations ≥ 10 Monotonic average measures Outfit MNSQs
< 2.0
Monotonic threshold calibrations Thresholds 1.4–5.0 logits apart Peaked probability curves
Fluency X X X
Accuracy X X X X
Complexity X X X
Interaction X X X X X X
Effectiveness X X X X