A researcher investigates whether there is a relationship between hours of sleep and memory for photographs by having 40 people sleep in the laboratory and waking 20 of the participants after 4 hours of sleep and the others after 8 hours of sleep. After they are awakened, each participant is asked to study 21 photographs and then recall as many details from the photographs as possible. In this
study, what is 8 hours of sleep?
a. The independent variable
b. The dependent variable
c. The sample
d. A condition of the independent variable
d
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After riding several roller coasters, you find that you feel nauseous. You feel the nausea because your ____ has been overstimulated.?
a. ?gustation b. ?kinesthetic perception c. ?sense of equilibrium d. ?analgesia
A major factor contributing to the relative negativity of the neuron's internal environment at rest is a. its large amount of sodium
b. its large amount of potassium. c. the presence of negatively charged protein ions. d. the absence of negatively charged protein ions.
Mary always tries to listen to her friend's problems and to express care and sympathy. What does Mary demonstrate?
a. appraisal c. socialization b. emotional concern d. instrumental aid
The wage gap between Blacks and Whites has
a. widened in the past 20 years. b. been reduced significantly in the past 10 years. c. stayed the same within the past 20 years. d. doubled in the past 20 years.