Fig. 2
Power using calibrated and non-calibrated approaches, depending on mistargeting of the trial sample μ. Legend: power is presented for instruments with varying number of items J and modalities M. Presented results are for comparison of treatment groups based on \(\hat{\gamma}\), for scenarios with the distribution of the item parameters = second archetype with SD of 1.5 and range of 2, γ = 0.2, Ntrial = 500, Ncalibration = 250, variance of the calibration sample = 1