When people change their usual behavior because they know they are being observed, the problem of ______________ has occurred.
A. selective deposit
B. spurious relationship
C. reactivity
D. demand characteristics
C. reactivity
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Ebbinghaus used which of the following as stimuli in his classic studies of forgetting?
a. geometric shapes b. nonsense syllables c. common English words d. uncommon English words
Using her data set regarding the working conditions and stress levels of domestic workers, Callie has calculated the standard deviation of their housing expenses in two ways, with and without the workers who have zero housing expense. When she includes all workers, the standard deviation is ____
a. smaller b. larger c. the same d. scattered
What is the relationship of high levels of motor activity and frequent crying at 4 months of age to later development?
a. There is no relationship to later behavior. b. These babies become high exploring, curious toddlers. c. These babies show greater fearfulness and shyness at later ages. d. These babies have fewer behavior problems than the quiet, less active infants.
Which of the following can infants recognize a few hours after birth?
a. human sounds b. human faces c. human touch d. human affinity