Research Article
Towards the Design of Context-Aware Adaptive User Interfaces to Minimize Drivers’ Distractions
Table 6
Data reliability test (Cronbach’s alpha).
| Measurement items | Observations | Sign | Item-test correlation | Item-rest correlation | Average interitem correlation | Cronbach’s alpha |
| ATTD1 | 93 | + | 0.4502 | 0.3883 | 0.0317 | 0.6630 | ATTD2 | 93 | + | 0.1809 | 0.1082 | 0.0338 | 0.6773 | ATTD3 | 93 | + | 0.2464 | 0.1753 | 0.0333 | 0.6739 | ATTD4 | 93 | − | 0.0678 | 0.0061 | 0.0347 | 0.6830 | ITU1 | 93 | + | 0.5422 | 0.4868 | 0.0310 | 0.6577 | ITU2 | 93 | + | 0.2894 | 0.2197 | 0.0330 | 0.6717 | ITU3 | 93 | + | 0.2562 | 0.1853 | 0.0332 | 0.6734 | ITU4 | 93 | + | 0.2598 | 0.1890 | 0.0332 | 0.6732 | PDU1 | 93 | − | 0.1753 | 0.1025 | 0.0338 | 0.6776 | PDU2 | 93 | + | 0.0650 | 0.0090 | 0.0347 | 0.6832 | PDU3 | 93 | + | 0.3073 | 0.2382 | 0.0328 | 0.6707 | PDU4 | 93 | − | 0.1690 | 0.0960 | 0.0339 | 0.6780 | PDU5 | 93 | + | 0.3526 | 0.2855 | 0.0325 | 0.6683 | PDU6 | 93 | + | 0.4834 | 0.4236 | 0.0315 | 0.6611 | UAL1 | 93 | + | 0.3182 | 0.2496 | 0.0328 | 0.6702 | UAL2 | 93 | + | 0.3504 | 0.2832 | 0.0325 | 0.6684 | OPT1 | 93 | + | 0.2179 | 0.1460 | 0.0335 | 0.6754 | OPT2 | 93 | + | 0.1529 | 0.0797 | 0.0340 | 0.6788 | OPT3 | 93 | + | 0.1217 | 0.0482 | 0.0343 | 0.6803 | OPT4 | 92 | + | 0.2932 | 0.2239 | 0.0329 | 0.6715 | OPT5 | 92 | + | 0.0354 | 0.0381 | 0.0349 | 0.6845 | OPT6 | 93 | − | 0.0368 | 0.0371 | 0.0349 | 0.6846 | OPT7 | 91 | + | 0.1371 | 0.0639 | 0.0341 | 0.6794 | OPT8 | 93 | − | 0.1884 | 0.1158 | 0.0337 | 0.6770 | OPT9 | 93 | + | 0.4510 | 0.3892 | 0.0317 | 0.6629 | OPT10 | 92 | − | 0.1312 | 0.0582 | 0.0342 | 0.6798 | OPT11 | 93 | − | 0.1546 | 0.0814 | 0.0340 | 0.6787 | EOU1 | 93 | + | 0.1236 | 0.0500 | 0.0342 | 0.6802 | EOU2 | 93 | − | 0.1411 | 0.0678 | 0.0341 | 0.6794 | EOU3 | 93 | + | 0.1426 | 0.0693 | 0.0341 | 0.6793 | EOU4 | 93 | + | 0.2362 | 0.1647 | 0.0334 | 0.6745 | EOU5 | 93 | + | 0.2029 | 0.1306 | 0.0336 | 0.6762 | EOU6 | 93 | − | 0.1325 | 0.0590 | 0.0342 | 0.6798 | EOU7 | 93 | + | 0.1484 | 0.0751 | 0.0341 | 0.6790 | EOU8 | 93 | + | 0.2544 | 0.1834 | 0.0332 | 0.6735 | SUS1 | 93 | + | 0.3642 | 0.2976 | 0.0324 | 0.6677 | SUS2 | 93 | − | 0.1246 | 0.0510 | 0.0342 | 0.6802 | SUS3 | 93 | + | 0.0575 | 0.0164 | 0.0347 | 0.6835 | SUS4 | 93 | + | 0.2450 | 0.1738 | 0.0333 | 0.6740 | SUS5 | 93 | − | 0.1081 | 0.0343 | 0.0344 | 0.6810 | SUS6 | 93 | + | 0.2057 | 0.1335 | 0.0336 | 0.6761 | SUS7 | 93 | + | 0.3498 | 0.2825 | 0.0325 | 0.6685 | MML1 | 93 | + | 0.1521 | 0.0788 | 0.0340 | 0.6788 | MML2 | 93 | + | 0.1069 | 0.0332 | 0.0344 | 0.6811 | MML3 | 93 | + | 0.1309 | 0.0574 | 0.0342 | 0.6799 | MML4 | 93 | + | 0.1866 | 0.1139 | 0.0338 | 0.6771 | MML5 | 93 | − | 0.1242 | 0.0506 | 0.0342 | 0.6802 | MML6 | 93 | − | 0.0467 | 0.0272 | 0.0348 | 0.6841 | MML7 | 93 | − | 0.2135 | 0.1414 | 0.0336 | 0.6757 | MML8 | 93 | + | 0.2316 | 0.1600 | 0.0334 | 0.6747 | MVI1 | 93 | + | 0.3433 | 0.2758 | 0.0326 | 0.6688 | MVI2 | 93 | + | 0.1661 | 0.0931 | 0.0339 | 0.6781 | MVI3 | 93 | + | 0.3659 | 0.2993 | 0.0324 | 0.6676 | MVI4 | 93 | + | 0.3062 | 0.2369 | 0.0328 | 0.6708 | MPI1 | 93 | + | 0.1574 | 0.0842 | 0.0340 | 0.6785 | MPI2 | 93 | − | 0.3388 | 0.2711 | 0.0326 | 0.6690 | US1 | 93 | + | 0.3073 | 0.2383 | 0.0328 | 0.6707 | US2 | 93 | + | 0.2948 | 0.2253 | 0.0329 | 0.6714 | US3 | 93 | + | 0.3582 | 0.2913 | 0.0324 | 0.6680 | US4 | 93 | + | 0.1360 | 0.0625 | 0.0341 | 0.6796 | US5 | 93 | + | 0.3066 | 0.2374 | 0.0328 | 0.6708 | Test scale | | | | | 0.0335 | 0.6788 |
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