Visual predictability aids dual-task tracking

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One way of reducing dual-task costs is making tasks predictable. Predictability can be induced by perceptual cues, anticipation or planning of tasks (Fischer, Gottschalk, & Dreisbach, 2014; Töllner, Strobach, Schubert, & Müller, 2012). To extend this area of research it was investigated whether the display of advance visual information in dual-task tracking helps to decrease dual-task costs. Visual information are hypothesized to support feedforward control which pro- motes movement planning and a shift of attention to the auditory task. 36 participants (21 male, 22 Mage = 21.89 years) performed a pursuit tracking task, composed of three pseudo-random segments (Wulf & Schmidt, 1997), together with an auditory reaction time task. Participants had to follow a red t arget with constant x-axis velocity with a joystick. To manipulate predictability the tracking path ahead of the target was visualized (Visibility: 0, 200, 400, 600 and 800 ms). Also participants had to press a pedal upon hearing random high -pitched tones while ignoring low-pitched tones. Both tasks were conducted in single-task (ST) and dual-task (DT) condition, in quasi-randomized order. Results show a significant effect of condition, η² = .286, and of Visibility, η² = .813, on tracking error, showing that tracking was worse in dual-task conditions and that tracking generally improved with visual information. No interaction was found. Mean reaction time (RT) across all visibility conditions was 545.89 ms (SD = 5.97 ms). In contrast to our hypothesis, there was no effect of Visibility on RTs, η² = .064. Tracking velocities were analyzed 200 ms before the onset of a target sound and 200 ms, 400 ms and 600 ms after onset (Interval). Analyses revealed a main effect of Visibility, η² = .035, a main effect of Interval, η² = .107 and a significant interaction, η² = .012. In all Visibility conditions participants were fastest in the interval of 400 ms after tone onset, so showing an increase in velocity shortly before reacting to sounds. Hence it was concluded that dual-task interference occurred at re-sponse level rather than during processing of the second task. The manipulation of visual pre-dictability revealed a beneficial effect for dual-task cost reduction on the visuomotor level. One potential explanation of why visual predictability had not impacted performance on the auditory task is that participants had preferred one task over the other and strategically allocated their resources on the tracking task. Future studies should also manipulate auditory predictabi lity (e.g. rhythmic tone sequences).
OriginalspracheDeutsch
TitelGelingende Entwicklung im Lebenslauf : Abstractband der 49. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (asp) vom 25. bis 27. Mai 2017 in Bern
Redakteure/-innenC. Zuber, J. Schmid, M. Schmidt, M. Wegner, A. Conzelmann
Seitenumfang2
Herausgeber/inUniversität Bern, Bern Open Publishing
Erscheinungsdatum27.05.2017
Seiten21-22
ISBN (elektronisch)978 -3- 906813 -42-4
DOIs
PublikationsstatusVeröffentlicht - 27.05.2017
VeranstaltungJahrestagung der asp - Bern, Schweiz
Dauer: 25.05.201727.05.2017
Konferenznummer: 49

ID: 3003470

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