Kipsigi infants walk considerably earlier than North American infants because
A) Kipsigi babies are smaller at birth, requiring less leg-muscle strength for standing.
B) Kipsigi babies have a genetic tendency toward early motor development.
C) North American babies are mentally overstimulated, resulting in less motivation to walk.
D) Kipsigi parents emphasize early motor maturity, practicing formal exercises to stimulate particular skills.
D
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When the means for a two-factor study are displayed in a graph and the lines in the graph are perfectly parallel, what can you conclude about the main effects and interaction? a. There is no main effect for either of the two factors
b. There is a main effect for both of the two factors. c. There is no interaction between factors. d. There are no main effects and no interaction between factors.
People with _____ disorders complain of physical problems, yet there is no evidence of physical abnormality
Fill in the blank(s) with correct word