Measuring the Effectiveness of Response Inhibition regarding to Motor Complexity: Evidence from the Stroop Effect
Fecha
20172017
Institución
Resumen
We studied the effectiveness of response inhibition
in movements with different degrees of motor complexity when
they were executed in isolation and alternately. Sixteen participants
performed the Stroop task which was used as a measure of
response inhibition. Participants responded by lifting the index
finger and reaching the screen with the same finger. Both actions
were performed separately and alternately in different experimental
blocks. Repeated measures ANOVAs were used to compare
Reaction time, Movement time, Kinematic errors and Movement
errors across conditions (experimental block, movement and
congruency). Delta plots were constructed to perform distributional
analyses of response inhibition and accuracy rate. The
effectiveness of response inhibition did not show difference when
the movements were performed in separated blocks. Nevertheless,
it shown differences when they were performed alternately in the
same experimental block, being more effective for the lifting
action. This could be due to a competition of the available
resources during a more complex scenario which also demands to
adopt some strategy to avoid errors.
Keywords—Response inhibition; motor complexity; Stroop
task; delta plots.