For each example, first determine whether the research is experimental or correlational. If it is experimental, identify the independent and dependent variables, as well as the experimental and control groups. If it is correlational, indicate the direction of the correlation. Please attach your answers as a Microsoft word file or a PDF to the assignment link provided. 1. A researcher is interested in whether babies who hear classical music before they are born are smarter than babies who do not. The researcher assigns one group of pregnant women to listen to classical music for five hours a week, while another group listens to country music. Five years later, the research compares the IQ scores of the children born to the women. 2. Dr. Freud has designed a study to examine the effects of eating on dreaming. One group in his study is instructed to eat a heavy meal just before bedtime, and another group is asked to fast for 4 hours prior to bedtime. Both groups record the number of dreams that they remember. 3. An educational researcher is interested in whether children perform better on tests if they have caten a hearty breakfast. On this week's spelling test, she asks the students to report all the food they ate that morning for breakfast. She then estimates the number of calories that they ate. The researcher finds that the more calories that the children consumed, the fewer errors they made fomale monkeys
Experimental method studies cause and effect relationships between two variables. In order to conduct a research study, the experimenter selects a sample from the target population. Sampling is done as the entire population cannot be selected for conducting the research due to its vast size. After the sample is selected, the experimenter divides the sample into two groups, 1) Experimental group and 2) Control group.
Dependent variable is the variable regarding which the researcher makes a prediction. Independent variable on the other hand, is the variable that is selected, manipulated and measured by the researcher in order to study observable transformation in the dependent variable. The independent variables that are not selected by the researcher or the independent variables whose effect on the dependent variable the researcher doesn't want to study and which can affect the dependent variable are controlled by the experimenter.
Correlation examines the magnitude and direction of connections between 2 or more variables. Correlation does not exhibit any cause and effect relationships between the variables. It simply, denotes a relation between their alteration without considering whether or not the alteration in one variable has caused alteration in the other variable.
Correlation may be positive or negative. Correlation is positive, when the high and low magnitudes of a variable is related respectively with the high and low magnitudes of the other variable that are involved in the study. It is said to be negative, if the high magnitude of one variable is in connection with the other variable or vice versa.
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In a study by the famous psychologist, Harry Harlow, infant female monkeys were raised either with their own mother, or a cloth-covered wire dummy equipped with milk. Harlow found that female monkeys raised with the wire mother were unable to take care of their own young when they had babies. Is this experimental or corrational?
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