Table 3.
Study sample information, number of effect sizes (k) and total number of participants (i.e., across experiments / conditions)
| Author (Year) | k | Cognitive domain | Target | Timing | Design | N |
|---|---|---|---|---|---|---|
| Thomas et al. (2021) | 4 | Executive functions | F3 | Offline | Within-subjects | 115 |
| Wu et al. (2018) | 4 | Social cognition | FC6 | Offline | Within-subjects | 24 |
| Martínez-Pérez et al. (2019) | 8 | Executive functions | F3 | Online | Between | 29 |
| Shen et al. (2016) | 14 | Impulsivity | F3, F4 | Online | Within-subjects | 39 |
| Choi & Perrachione (2019) | 4 | Language | T7 | Online | Mixed | 60 |
| Albein-Urios et al. (2019) | 6 | Reward learning | FP2, FZ | Offline | Between-subjects | 52 |
| Martin et al. (2017a, b) | 13 | Social cognition | FZ | Online | Mixed | 40 |
| Fiori et al. (2019) | 2 | Language | F6 | Online | Mixed | 20 |
| To et al. (2018) | 4 | Executive functions | FZ | Offline | Between-subjects* | 45 |
| Donaldson et al. (2019) | 15 | Social cognition | P6 | Offline | Between-subjects* | 53 |
| Guo et al. (2018) | 3 | Executive functions | F3 | Online | Between-subjects | 58 |
Target is indicated in reference to the international 10–20 system of electrode placement
*Between-subjects design with baseline comparison