Figure 2 | Scientific Reports

Figure 2

From: Measurement precision of the Pain Catastrophizing Scale and its short forms in chronic low back pain

Figure 2

Test information function (TIF, in inverse-square-logits units) related to the four versions of the PCS: 13-item full version (PCS) and short forms (PCS-6, PCS-4, and Brief-PCS). The TIF is a graphical representation of the precision of each scale according to each individual pain catastrophizing level (θ). A TIF of 4 (roughly corresponding to a SE of 0.5) has been defined as the threshold for acceptable precision.

Back to article page