For each of the correlational relationships below, find at least one confound (also called third-variables) that could help us to explain this relationship (rather than assuming that a causal relationship between variables exists). Remember, confounds in correlational studies explain the relationship between variables because they cause both variables, rather than one or the other. Therefore, be sure to explain how a confound influences both variables in your responses. 1. A TV news show reported that women who have a baby over the age of forty are more likely to live to be one hundred than those who do not. Is having a baby at a relatively late childbearing age responsible for prolonged life? 2. A recent finding that a baby's weight at birth is positively correlated with later IQ scores. Does this mean that birth weight causes IQ scores? 3. Vanuatu Islanders believed for some time that body lice were a cause of good health. They noticed that people who were ill with influenza
For each of the correlational relationships below, find at least one confound (also called third-variables) that could help us to explain this relationship (rather than assuming that a causal relationship between variables exists). Remember, confounds in correlational studies explain the relationship between variables because they cause both variables, rather than one or the other. Therefore, be sure to explain how a confound influences both variables in your responses.
1. A TV news show reported that women who have a baby over the age of forty are more likely to live to be one hundred than those who do not. Is having a baby at a relatively late childbearing age responsible for prolonged life?
2. A recent finding that a baby's weight at birth is
3. Vanuatu Islanders believed for some time that body lice were a cause of good health. They noticed that people who were ill with influenza and other infectious diseases did not have body lice. Should we find lice to put on our bodies?
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