In each of the following situations, data are obtained by conducting a research study. Classify
each Experimental or Correlational. Research Study A researcher is interested in whether
listening to different types of music or no music while taking a test affects test scores. Students
are randomly assigned to one of three groups: The first group takes a test without listening to an
iPod, the second group takes the same test while listening to classical music on an iPod, and the
third group takes the test while listening to rock music on an iPod. The researcher compares the
test scores across the three groups. A psychologist is interested in gender and cognition. She
collects data on a large sample of siblings, recording their gender, birth order, and IQ. A
professor of ophthalmology is interested in developmental precursors of vision disorders. He
collects data from a sample of teenagers on right-eye vision, left-eye vision, and whether the
bedroom light was kept off or on as they slept during the night as babies.
Solution
1) Experimental ( There is intervention- types of music)
2) correlational ( There is No intervention, only collection of data)
3) correlational ( There is No intervention, only collection of data).
In each of the following situations, data are obtained by conducting .pdf
1. In each of the following situations, data are obtained by conducting a research study. Classify
each Experimental or Correlational. Research Study A researcher is interested in whether
listening to different types of music or no music while taking a test affects test scores. Students
are randomly assigned to one of three groups: The first group takes a test without listening to an
iPod, the second group takes the same test while listening to classical music on an iPod, and the
third group takes the test while listening to rock music on an iPod. The researcher compares the
test scores across the three groups. A psychologist is interested in gender and cognition. She
collects data on a large sample of siblings, recording their gender, birth order, and IQ. A
professor of ophthalmology is interested in developmental precursors of vision disorders. He
collects data from a sample of teenagers on right-eye vision, left-eye vision, and whether the
bedroom light was kept off or on as they slept during the night as babies.
Solution
1) Experimental ( There is intervention- types of music)
2) correlational ( There is No intervention, only collection of data)
3) correlational ( There is No intervention, only collection of data)
