The combined variance for two independent samples is known by what term?
What will be an ideal response?
Pooled variance
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Why is it difficult to establish cause and effect in research studies on drug use during pregnancy?
A. The effects might not be seen until after birth, requiring a longitudinal study. B. People who abuse drugs tend to have poor health practices in other domains. C. The effects of most drugs wear off once the child is born. D. Effects of drugs are quite small and difficult to detect.
If an organism emits a response only in the presence of reinforced stimuli and not in the presence of unreinforced stimuli, then the organism is displaying:
A. discrimination B. spontaneous recovery C. extinction D. generalization
Dr. Kelly is studying the effects of time constraint on performance. She is studying men and women of various ages. What is the independent variable in this study?
A. performance B. time constraint C. gender D. age
Cells that convey environmental information, carry out the functions underlying thought, emotion, and movements, and transmit commands out to the body's organs and muscles are called ______.
A. neurons B. dendrites C. phagocytes D. glia