Final answer:
Identical twins show more interest in each other than in an unfamiliar infant, influenced by genetic and social factors as well as phenomena like stranger anxiety. Studies like the Minnesota Study of Twins Reared Apart highlight the biological and social similarities of twins raised apart.
Therefore, it is Option 1: True.
Step-by-step explanation:
The statement that identical twins show more interest in each other than in an infant who is unfamiliar is true. This phenomenon can be linked to stranger anxiety, which is typically exhibited around the same time children develop object permanence. Identical twins, having the same genetic makeup, are naturally inclined to recognize and be more comfortable with each other than with unfamiliar infants.
Studies such as the Minnesota Study of Twins Reared Apart have shown how identical twins even when raised apart share similar preferences and behavior, therefore it is likely that they would show more interest in each other. More broadly, this interest reflects deeper biological and social connections that would naturally make them gravitate towards one another over strangers.
Therefore, it is Option 1: True.