Table 5.
Main findings of the adult and infant literature review carried out in previous sections. As evident, no single hypothesis covers all of the evidence.
| Finding |
Signal-driven | Domain-driven | Learning bias | |
|---|---|---|---|---|
| 1 | Adults: Slow signals activate more LH if linguistically contrastive | ( | + | + |
| 2 | Adults: Language mode activates more LH (task effects) | + | + | |
| 3 | Adults: Sign language activates more LH | + | + | |
| 4 | Adults: LH involvement proportional to proficiency | ( | ( | + |
| 5 | Adults: FL contrast elicits RH if slow, LH if fast | + | ( | |
| 6 | Newborns: L1 vs non-speech only in LH in the absence of extensive experience | + | ( | |
| 7 | Infants: Slow signals activate more RH | + | ||
| 8 | Infants: L-dominance increases with development and experience | ( | ( | + |