
360 P.N. Day et al.
Table 1. Correlations between voice output and ease of use.
Rating Rating ρ P
Voice output rating Ease of use for selecting a seat 0.479 0.0009
(vertical uNav)?
Voice output rating Ease of use for navigating between 0.3719 0.0119
screens (vertical uNav)?
Voice output rating Ease of use for entering alphanumeric 0.344 0.0179
information (horizontal uNav)?
Voice output rating Ease of use for navigating between 0.4671 0.0009
screens (horizontal uNav)?
Voice output rating Ease of use for selecting a seat 0.5964 0.0055
(touchscreen)?
Voice output rating Ease of use for navigating between 0.6085 0.0044
screens (touchscreen)?
Voice output rating ...