Does engaging in physical activity have a protective effect against later development of depression?
What will be an ideal response?
Although there are some mixed findings, when examining the studies with better methodology, it appears that it does. For example, using a large scale community sample from the Alameda County Study, epidemiologists were able to determine that physical activity was protective against developing later depression both through cross-sectional and longitudinal analysis even after controlling for potentially confounding variables.
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Explain why "a correlation does not prove causation."
What will be an ideal response?
The correlational method expresses the direction and size of the link between two variables by a statistical device called the ______________
Fill in the blank(s) with correct word
Multiple sclerosis involves the deterioration of the __________ of the neuron
a. terminal buttons b. myelin sheath c. soma d. dendrites e. axons
What does a correlation coefficient do?
a. It allows us to draw conclusions about whether one variable causes another variable. b. It creates a correlational design, rather than an experimental design. c. It quantifies the pattern in a relationship. d. It summarizes the X scores and the Y scores separately.