Lisa, a two-year-old, was developing like a normal child until recently. She has now lost her ability to crawl and many other previously acquired skills. Lisa is most likely to be diagnosed with _________
A) separation anxiety disorder
B) Asperger's disorder
C) childhood disintegrative disorder
D) Down syndrome
C
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Which statement is accurate about correlational studies? a. They are very limited in the number of variables that can be evaluated at one time
b. They allow us to evaluate variables that would be unethical to manipulate in other types of research. c. They give us clear information about the direction of causality. d. They can tell us about cause and effect.
Which of the following motor skills will most likely peak latest in life?
A) speed of limb movement B) explosive strength C) gross-motor coordination D) aiming
Few problems are associated with having sexual intercourse during the first 8 months of pregnancy
a. True b. False
Concerning genetic sex, males normally have which chromosomal combination?
a. XXY b. XY c. XX d. XYY