Mental Timing in Locomotion: Walking Across Real and Imagined Distances

This research study sought to replicate and expand upon the original work of Decety et al. (1989) by examining the relationship between imagined and executed walking over varying distances. Thirty healthy adults participated in both imagined and executed walking tasks, covering distances of 5, 10, and 15 meters. Additionally, participants completed the Movement Imagery Questionnaire 3 (MIQ 3) to assess their mental imagery capabilities.

To evaluate the correspondence between imagined and actual walking durations, the researchers employed several statistical techniques, including repeated-measures ANOVA, correlation analyses, Bayesian equivalence tests, and Bland Altman analyses. The results demonstrated that walking duration increased significantly with distance, irrespective of whether the walking was imagined or executed.

Remarkably, the Bayesian equivalence tests provided compelling evidence for temporal equivalence between imagined and actual walking, indicating that the two modalities were indeed temporally equivalent. Furthermore, the Bland Altman analyses revealed good agreement between the two modalities with minimal systematic bias.

Interestingly, the study found that there were no significant differences in walking times between imagined and executed walking tasks. Additionally, the MIQ 3 scores did not correlate with any significant differences in walking durations, suggesting that mental imagery alone does not influence the duration of walking movements.

In summary, this study successfully replicated and extended the findings of Decety et al. (1989), providing additional support for the principle of functional equivalence for highly automated and cyclic movements. By incorporating a larger sample size and contemporary statistical approaches, the researchers have strengthened the case for the temporal equivalence between motor imagery and movement execution across varying distances.