Figure 1
Illustration of the Drift-Diffusion Model. See main text for further information. From “Mechanisms of processing speed training and transfer effects across the adult lifespan: protocol of a multi-site cognitive training study,” by von Bastian, C. C., Reinhartz, A., Udale, R. C., Grégoire, S., Essounni, M., Belleville, S., & Strobach, T. (2022). Mechanisms of processing speed training and transfer effects across the adult lifespan: Protocol of a multi-site cognitive training study. BMC Psychology, 10, Article 168. https://doi.org/10.1186/s40359-022-00877-7. Copyright 2022 CC BY 4.0.
Figure 2
Examples of Fractal Patterns in the Pattern-Matching Task.
Table 1
Overview of Trial, Session, and Participant Count per Task.
| TASK | |||
|---|---|---|---|
| FACES | DIGITS | PATTERNS | |
| Data Recorded (N) | |||
| Trials | 299,260 | 299,000 | 296,799 |
| Sessions | 599 | 598 | 598 |
| Participants | 30 | 30 | 30 |
| Data Treatment Steps (% Remaining Trials) | |||
| 1. RT (<250 ms; >2.5 MAD) | 95.09% | 95.48% | 94.84% |
| 2. Sessions (<125 trials) | – | – | 94.75% |
| 3. Sessions (<4% errors) | – | 88.32% | 64.61% |
| 4. Participants (<10 sessions) | – | 87.04% | 61.25% |
| Data Post-Treatment (N) | |||
| Trials | 284,564 | 260,256 | 181,783 |
| Sessions | 599 | 545 | 385 |
| Participants | 30 | 29 | 25 |
[i] Note. This table summarizes the number of trials, sessions, and participants in each task before and after data treatment steps.
Figure 3
Graphical Illustration of Model Fit as a Function of Errors and Reaction Time Quartiles.
Figure 4
Training Effects on Mean Reaction Times (RTs) and Error Rates in the Individual Matching Tasks. RTs are to correct responses only. The error bars denote approximated 95% confidence intervals for within-subjects comparisons calculated according to Cousineau (2005) and Morey (2008). Note that there are differences in the number of available data points per session and task due to the reported data treatment.
Figure 5
Training Effects on Diffusion-Model Parameters in the Individual Matching Tasks. The error bars denote approximated 95% confidence intervals for within-subjects comparisons calculated according to Cousineau (2005) and Morey (2008). Note that there are differences in the number of available data points per session and task due to the reported data treatment.