Validity, reliability, and psychometric properties of a computerized, cognitive assessment test (Cognivue®)

Figure 1 Cognivue^® quantitative sub-batteries. A: Visuomotor testing (motor control, visual salience); B: Perceptual processing (letter, word, shape, motion); C: Memory testing (letter, word, shape, motion).

Figure 2 Scatterplot showing the St Louis University Mental Status and Cognivue^® scores for the 92 study participants. The table to the left of the scatter plot provides a key for relating the plot to participant classifications. Above the upper horizontal red line shows Cognivue^® scores of < 50 and to the left of the left vertical blue line shows St. Louis University Mental Status (SLUMS) scores < 21 denoting impaired. Below the bottom horizontal red line shows Cognivue^® scores of > 75 and to the right of the right vertical blue line shows SLUMS > 27 denoting unimpaired. Results of the analyses of classification are included in the table enclosed in the scatter plot. ACC: Accuracy; FN: False negative; FP: False positive; N%A: Negative percent agreement; P%A: Positive percent agreement; SLUMS: St. Louis University Mental Status; TN: True negative; TP: True positive.

Figure 3 Scatterplot showing first test scores (abscissa) and second test scores (ordinate) co-plotted with a Deming regression line (dashed) and 45° line (solid) for Cognivue^® and the St Louis University Mental Status. A: Cognivue^®; B: St. Louis University Mental Status. Cognivue^®: Intercept of line: 95% confidence interval (CI): 4.27-13.84 (SE = 2.433; P = 0.0002); slope of line: 95%CI: 0.880-0.993 (SE = 0.0285; P = 0.0264); regression fit: R² = 0.81 (r = 0.90). St. Louis University Mental Status: Intercept of line: 95%CI: 2.24-6.06 (SE = 0.970; P < 0.0001); slope of line: 95%CI: 0.82-0.97 (SE = 0.039; P = 0.039); regression fit: R² = 0.67 (r = 0.82). SLUMS: St. Louis University Mental Status.

Figure 4 Scatterplot showing regression standardized predicted values including all five factors and Cognivue^® scores or the St Louis University Mental Status scores co-plotted with linear regression lines. A: Cognivue^®; B: St. Louis University Mental Status. Avg: Average; R²: Coefficient of determination; SLUMS: St. Louis University Mental Status.