An experimenter computing the correlation between age and memory span wouldQuestion 8Answera.be able to show that old age produces a decrease in memory span.b.be able to determine whether there is a relationship between age and memory span.c.make an error because age and memory span are measured on different scales.d.be able to determine that a third variable was involved.
Question
An experimenter computing the correlation between age and memory span wouldQuestion 8Answera.be able to show that old age produces a decrease in memory span.b.be able to determine whether there is a relationship between age and memory span.c.make an error because age and memory span are measured on different scales.d.be able to determine that a third variable was involved.
Solution
The correct answer is b. The experimenter would be able to determine whether there is a relationship between age and memory span. Correlation is a statistical measure that describes the size and direction of a relationship between two or more variables. A correlation can be positive, meaning both variables move in the same direction, or negative, meaning that when one variable's value increases, the other variables' values decrease. Correlation does not imply causation, so it would not be correct to say that old age produces a decrease in memory span based on correlation alone. Also, correlation can be computed between variables measured on different scales, so option c is incorrect
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