From: Prevalence and heritability of handedness in a Hong Kong Chinese twin and singleton sample
Handedness | Twins | Singletons | Total | |||
---|---|---|---|---|---|---|
Score | Male | Female | Male | Female | Twins | Singletons |
EHI | ||||||
 N | 187 | 197 | 220 | 204 | 384 | 424 |
 Mean | .618 | .662 | .548 | .607 | .641 | .577 |
  SD | .422 | .410 | .427 | .351 | .416 | .393 |
PegQ | ||||||
 N | 190 | 204 | 221 | 205 | 394 | 426 |
 Mean | .093 | .096 | .094 | .099 | .094 | .097 |
 SD | .097 | .105 | .106 | .093 | .101 | .100 |