Fig 1.
Time course of a trial in this version of the TMT. Participants were first instructed to hit targets in the following trial either as fast (speed) or as central (accuracy) as possible. After a fixation display, they started the TMT sequence by pressing the space bar. Participants clicked the sequence of numbers (TMT-A) or numbers and letters (TMT-B) in ascending order while their eye movements were recorded. Correct answers were indicated by a high-pitched sound, wrong answers were indicated by a low-pitched sound. The black dot indicates the current position of the mouse.
Fig 2.
Test scores in TMT-A/-B under speed/accuracy instructions.
Bar plots for the dependent variables across all conditions (test halves A and B; speed and accuracy instruction). Error bars represent the standard error of the mean. The red line underneath the plots indicates variables representing eye movement control measures. The green underneath the plots indicates variables representing classic TMT measures, i.e. trial duration.
Fig 3.
Variables dominated by the individual variability vs. the speed-accuracy manipulation.
Results of the analyses for R-squared values and the Bayes Factor comparison of fixed versus random effects in the model for each examined dependent variable in TMT-A (Fig 3a) and TMT-B (Fig 3b). Error bars in the R-squared plot represent bootstrapped 95% C.I. All variables related to eye movement control are plotted in red. All variables related to classic TMT measures, i.e. trial duration, are plotted in green.
Table 1.
Results of the linear mixed-effect models.