Two-year-old Tiki has acquired the ability to spin one arm in a large circle while holding the other arm perfectly still. This exemplifies the orthogenetic principle element of

Question

Quizplus · Accepted Answer

The ability to spin one arm in a large circle while holding the other perfectly still demonstrates differentiated response, which is the ability to perform more complex and specialized movements.

Two-Year-Old Tiki Has Acquired the Ability to Spin One Arm