From: The usability of ventilators: a comparative evaluation of use safety and user experience
Ā | Contrasts with Bonferroni correction | Post hoc t tests without correction | Effect size | |||
---|---|---|---|---|---|---|
MD (Mvent1ā āāMvent2) | p | t(47) | p | Cohenās d | ||
Use error/close calls (%) Use safety | ||||||
Vent1 | Vent2 | Ā | Ā | Ā | Ā | Ā |
G5 | PB980 | ā0.391 | 1.000 | ā0.209 | 0.835 | 0.03 |
G5 | SERVO-U | 3.646 | 0.044a | 2.804 | 0.007a | 0.40 |
G5 | V500 | ā4.167 | 0.292 | ā2.024 | 0.049a | 0.29 |
PB980 | SERVO-U | 4.036 | 0.149 | 2.319 | 0.025a | 0.33 |
PB980 | V500 | ā3.776 | 0.287 | ā2.032 | 0.048a | 0.29 |
SERVO-U | V500 | ā7.813 | 0.002a | ā3.824 | <0.001a | 0.55 |
NASA-TLX (0ā100) Workload | ||||||
Vent1 | Vent2 | Ā | Ā | Ā | Ā | Ā |
G5 | PB980 | ā15.449 | < 0.001a | ā4.404 | < 0.001a | 0.64 |
G5 | SERVO-U | 6.765 | 0.153 | 2.308 | 0.025a | 0.33 |
G5 | V500 | ā6.379 | 0.547 | ā1.725 | 0.091 | 0.25 |
PB980 | SERVO-U | 22.214 | < 0.001a | 7.524 | < 0.001a | 1.09 |
PB980 | V500 | 9.070 | 0.072 | 2.615 | 0.012 | 0.38 |
SERVO-U | V500 | ā13.144 | < 0.001a | ā4.323 | < 0.001a | 0.62 |
PSSUQ (1ā7) System usability | ||||||
Vent1 | Vent2 | Ā | Ā | Ā | Ā | Ā |
G5 | PB980 | ā0.807 | 0.035a | ā2.884 | 0.006 | 0.42 |
G5 | SERVO-U | 0.935 | < 0.001a | 4.363 | < 0.001a | 0.63 |
G5 | V500 | ā0.452 | 0.508 | ā1.761 | 0.085 | 0.25 |
PB980 | SERVO-U | 1.742 | < 0.001a | 7.456 | < 0.001a | 1.07 |
PB980 | V500 | 0.354 | 1.000 | 1.195 | 0.238 | 0.17 |
SERVO-U | V500 | ā1.388 | < 0.001a | ā6.221 | < 0.001a | 0.87 |