Comparison Between Worth Four-Dot and Polarized Four-Dot Test

ABSTRACT

To compare between the Worth 4-dot test(W4D) with polarized 4-dot test(P4D), we examined the interpretable response rate, response time, age of test failure, false positive rate and negative rate of reporting fusion in 133 patients older than 3 years of age. The interpretable response rate for W4D was 91% and for P4D 93.2%. The mean response times were 20.9 seconds for W4D versus 16.9 seconds for the P4D, the difference being statistically significant(p<0.05). The age of test failure for W4D was 4.8 years old and for P4D 3.8 years old. The false positive rate of reporting fusion for W4D was 4.5% and for P4D 8.8%. The false negative rate for W4D was 37.5%, while for P4D was 15.2%, the difference being statistically significant(p<0.05). In conclusion, the P4D was found to be less dissociative test by allowing more natural environment, and was easier, more rapid interpretable test. Therefore, the P4D may provide a more accurate assessment of a patients sensory status.