To determine if sugar-rich diets affect hyperactivity in kids, a researcher first obtained parental permission and then prepared two daily menus that children received for a 30-day period. A high-sugar diet was given to the boys, whereas the girls had a menu that seemed identical but was not a high-sugar diet. At the end of the 30 days, the boys and girls were evaluated to determine their levels of hyperactivity. In the study, the amount of sugar in each child's diet is the __________.
A. placebo
B. independent variable
C. dependent variable
D. control group
Answer: B
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When can infants usually sit up by themselves (without assistance)?
a. By about 3 months b. Not until 9-10 months c. As soon as they are old enough to lift their heads and torsos off the ground d. Usually around 7 months
Evidence indicates that only a small number of abused and neglected children grow into adulthood with a tendency to engage in violent behavior.
Indicate whether the statement is true or false.
Once an action potential reaches the end of the axon, how does the information usually get to the next neuron?
a. ?The action potential jumps across the synaptic cleft to the next neuron in the form of an electrical impulse. b. ?Myelin acts as a bridge to transport it across the synaptic cleft.? c. ?Potassium ions (K+) move back and forth between neurons to carry the information across. d. ?Vesicles at the end of the axon release neurotransmitters which float across the synaptic cleft to the next neuron.
The three methods that social scientists from every discipline use to explore human behavior are:
observation, experiments, survey. cross-sectional, longitudinal, cross-sequential. biological, social, cognitive. significance, odds ratio, factor analysis.