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​About 10% to 15% of new mother experience the “baby blues,” which is a very serious psychological condition that can lead to problems for the child.

​When looking through a microscope at an entire set of human male chromosomes, how would you be able to differentiate an autosome pair from a sex chromosome pair?

One way that infants can pick words out of spoken language is the stress, or emphasis, that is placed on certain words.

Some researchers have suggested that a phenomenon called “mindblindness” underlies the autism spectrum disorders.

​Gracie helps her mother set the table for dinner without being asked. She lays out napkins and silverware, places the plates in their correct spots, and puts ice in all of the glasses. When her mother realizes that she has done this, she gives Gracie a big hug, thanks her repeatedly, and later gives her a little extra dessert as a treat. In learning theory, we would say that Gracie’s behavior has been:

Most one-year-old children have already developed a theory of mind.

​Which term does NOT belong in this group?

Infants typically double their weight by their third month, and triple it by their first birthday.

​The primary pioneer in the study of behaviorism was Erik Erikson.

​During pregnancy, it is necessary for the mother to eat 10% to 20% more calories than regular in order to adequately provide for the needs of her unborn child.