Cognition is the activity of knowing and the processes through which knowledge is acquired and problems are solved

Dr. Zielke's research shows that the death of a spouse in old age is correlated with a decline in the surviving partner's physical health. Which of the following conclusions is supported by this study?

A) The death of a spouse causes a decline in the surviving partner's physical health. B) The death of a spouse is related to a decline in the surviving partner's physical health. C) A decline in a surviving partner's physical health can cause the death of a spouse. D) A third variable, such as memory loss, causes a surviving partner's decline in physical health.

What is a major limitation of correlational studies?

A) They cannot measure relationships among variables. B) They cannot measure the degree to which a relationship exists between variables. C) They cannot show the direction of a relationship between variables. D) They cannot provide information about causal relationships among variables.