Carl Westin

6-5 Results study 1 129 to inconsistently have solved the conflict. Inconsistency increased notably for each DS in the hierarchy. In Scenario 2, for example, only 6.3% of all participants were found consistent according to DS 4. 6-5-2 Control problem analysis Figure 6-5 shows the complete distribution of the solutions according to the control problem classification for Scenario 1. The overall preferred solution consisted of instructing the controlled aircraft to go in front of the intruder (DS 1). QS was most frequently controlled (DS 2) and instructed to turn right or turn right and increase speed (DS 3 and 4). OM was most frequently controlled when behind solutions were used. In front solutions were particularly common in Scenarios 2 (77.8%) and 4 (79.9%). Complete distributions for Scenarios 2, 3, and 4 are provided in Appendix E. In Scenario 2, aircraft choice for in front solutions (DS 2) was fairly evenly distributed between RG (34.9%) and PA (42.9%). For behind solutions, RG was more frequently controlled (19.1%) than PA (3.2%). The highest variability was found in Scenario 3, with a slight preference for in front solutions (53.1%). In Scenario 4, QS was selected as controlled aircraft in 73.4% of all solutions. The proportion of consistent participants and their problem-solving styles across all scenarios are shown in Figure 6-6. Participants generally agreed on instructing the controlled aircraft to go in front of the intruder. Notably, in Scenarios 2 and 4, the controlled aircraft was never consistently taken behind the intruder. The most com- mon problem-solving styles found in Scenarios 1 and 4 consisted of vectoring QS in front of the intruder. In both Scenarios, all participants found consistent according to DS 1 were also found consistent according to DS 2. Note, however, that only In front Behind QS QS OM OM H H H S S S C C C R R L I D D RI RI RD RD LI LD Control preference (DS 1) Aircraft choice (DS 2) Resolution type (DS 3) Direction (DS 4) 64.1% 35.9% 60.9% 3.1% 3.1% 3.1% 3.1% 3.1% 3.1% 3.1% 4.7% 4.7% 31.3% 26.6% 26.6% 31.3% 29.7% 1.6% 1.6% 1.6% 1.6% 1.6% 17.2% 17.2% 7.8% 6.3% 6.3% H = Heading; S = Speed; C = Combined; R = Right; L = Left; I = Increase; D = Decrease F IGURE 6-5: Solution distribution for the Control problem classification in proportion (%) of total solutions, Scenario 1, Study 1.