Dr. Nguyen is studying how the quality of breakfast influences academic performance for elementary school children. A sample of 100 children is selected. Fifty children are provided with a nutritious breakfast when they arrive at school each morning. The other 50 children are given a doughnut each morning. After three months, Dr. Nguyen records the academic achievement level for each child and
compares the two groups of scores. In this example, how many levels are there for the independent variable?
a. 1
b. 2
c. 50
d. 100
b
Psychology
You might also like to view...
Endorphins bind to the same brain receptors as which drugs?
a. Anxiolytics b. Hallucinogens c. Stimulants d. Opiates
Psychology
Individuals who cannot delay gratifying their wants . . .
a. Are undercontrolled b. Are impulsive c. Lack ego control d. All of the above
Psychology
In biofeedback training, therapists attach clients to devices that measure bodily functions such as heart rate
Indicate whether the statement is true or false
Psychology
EEG recordings during REM sleep are similar to _________ waves
a. beta and alpha b. beta and theta c. alpha and theta d. theta and delta
Psychology