Figure 5
The histogram titled “Person-Item Threshold Distribution” includes the subtitle “Grouping Set to Interval Length of 0.20, making 100 Groups”. The horizontal axis is labeled “Location (logits)” and ranges from negative 10 to 10 with increments of 1 unit. The upper panel is labeled “PERSONS”. The left vertical axis is labeled “Frequency” and ranges from 0 to 25 with increments of 5 units. The right vertical axis shows percentages from 0.0 percent to 10.4 percent, with marked values at 2.1 percent, 4.2 percent, 6.3 percent, and 8.3 percent. A histogram of persons appears mainly between negative 4 and 3 logits, with the highest bar near negative 2 reaching about 24. A green smooth curve overlays the histogram, peaking near negative 3 at about 25 and rising again near 8 logits at about 12. Under “INFORMATION”, the value “7.65” appears. Summary statistics read “No. Mean SD” and “Total: [240], negative 0.460, 1.913”. Dashed horizontal reference lines are labeled 1.53, 3.06, 4.59, 6.12, and 7.65. The lower panel is labeled “ITEMS”. The left vertical axis is labeled “Frequency” and ranges from 0 to 10 with increments of 5 units. The right vertical axis shows percentages from 0.0 percent to 16.7 percent, with a marked value at 8.3 percent. Downward bars represent item thresholds, clustered primarily between negative 4 and 2 logits, with denser concentrations near negative 3 to negative 1 and near 0 to 1. A smaller cluster appears between 8 and 9 logits. Blue dashed horizontal reference lines appear at frequency levels 5 and 10. Note: All numerical data values are approximated.MEL-15 person-item threshold distribution map. Source: Authors’ own work