Mothers are generally more natural at reading their infant's emotions and responding with synchrony

"Turn that frown upside down, mister!" Maybe you heard this line from a grandparent at some point in your life. Okay, if you are a girl, maybe it was "missy," but you get the point! According to the __________ hypothesis,

smiling can, in fact, cause you to become happier! a. myographic stimulation b. facial feedback c. positive muscular d. masking

When symptoms of mental retardation are not apparent until after age 17,

A) the diagnosis would be dementia, not mental retardation. B) the retardation is almost always at least moderate and often severe. C) the treatment for retardation is more successful. D) the level of retardation is typically mild.