Human Growth and Development / Unit 3 HGD 0333 short lesson, about 20 seconds
Genes, Twins and Practice
Captions available
The idea
Identical twins are more alike than fraternal twins in when they reach motor milestones, which points to genetic influence on timing.
In practice
Myrtle McGraw's nineteen thirties twin studies, where practice produced very different abilities.
Where people slip
Genes and experience both shape motor timing; the approach behind dynamic systems theory now extends to cognition and language.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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