Table 3 Principal components analysis and reliability analysis for Test A.
From: Development of a self-administered web-based test for longitudinal cognitive assessment
Correct answers Mean (Standard Deviation) % Correct response | Principal component analysis | ||||
|---|---|---|---|---|---|
Patients | Controls | Reliability analysis | Corrected Item-Total Correlation | Cronbach’s Alpha if Item Deleted | |
Word categories task | 8.24 (4.49) 81.4% | 11.59 (4.03) 92.1% | 0.818 | 0.744 | 0.888 |
Attention task II | 19.94 (10.79) 93.7% | 22.16 (7.79) 98.0% | 0.698 | 0.614 | 0.900 |
Sequences | 5.24 (3.53) 88.0% | 8.80(4.16) 97.0% | 0.777 | 0.704 | 0.892 |
Visual memory task I | 5.59 (2.68) 84.8% | 6.22 (1.82) 93.6% | 0.495A | – | – |
Puzzles | 2.00 (1.37) 100% | 2.71 (1.79) 100% | 0.693 | 0.614 | 0.900 |
Written comprehension | 14.18 (3.22) 88.0% | 15.35 (3.49) 97.9% | 0.789 | 0.717 | 0.891 |
Shopping task | 3.90 (2.88) 88.0% | 6.29 (3.22) 96.0% | 0.803 | 0.728 | 0.890 |
Verbal memory task | 4.02 (2.14) 89.1% | 4.96 (2.36) 96.8% | 0.774 | 0.704 | 0.892 |
Inhibitory control | 23.94 (8.46) 86.1% | 26.18 (8.08) 97.7% | 0.819 | 0.750 | 0.888 |
