Discriminability as an Embedded Measure of Validity
Examining failure to recognize previously learned material as an embedded measure of validity is often evaluated on the California Verbal Learning Test, 3rd Edition (CVLT-3) forced choice recognition, while discriminability for yes/no recognition requires further study. The present evaluation examined the relationship between discriminability on the CVLT-3 and a freestanding measure of validity. Analysis of archival data involved 39 patients and neurocognitive data including the CVLT-3 and Green’s Word Memory Test (WMT). Overall, sample performance on CVLT-3 discriminability was low average (CVLT-3 discriminability ss=7.41, SD=0.53) while overall sample performance on WMT delayed recall was below the cutoff of sufficient effort (WMT delayed recall %=80.32, SD=3.05). The sample demonstrated a clinically significant correlation between CVLT-3 discriminability and WMT delayed recall, r=0.13, p=.02. A chi-square test of independence showed that there was a significant relationship between groups passing or failing the WMT and their respective performance on CVLT-3 discriminability above a scaled score of seven versus performance at or below a scaled score of seven, x² (1, N=39)=8.93, p=.002. Overall, results suggest discriminability on the CVLT-3 at or below a scaled score of seven is significantly related to failed performances on the WMT.