In the United States, about two thirds of all children from middle-class families show a(n) attachment

What are some problems identified with the central executive?

a) It is unlikely to be a single entity b) The notion of a single dysexecutive syndrome is misleading c) Neither a or b d) Both a and b

Due to advancements in fertility treatments, ____ have increased in recent times

monozygotic twins dizygotic twins conjoined twins Siamese twins