Suppose a Researcher Studied the Occurrence Rates of a Specific

question 233

Multiple Choice

Suppose a researcher studied the occurrence rates of a specific mental illness in monozygotic and dizygotic twins.She finds that if one twin suffers from the mental illness,the other twin is much more likely to also have the mental illness if the pair are monozygotic twins.What conclusion should the researcher draw from this evidence?

• A)The incidence of this type of mental illness is strongly influenced by genetics.
• B)The incidence of this type of mental illness is completely based on environmental factors.
• C)Monozygotic twins are at an increased risk of developing mental illness.
• D)Dizygotic twins are at an increased risk of developing mental illness.

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Definitions:

Random Assignment

A method of assigning participants that ensures each participant has an equal chance of being assigned to the experimental group or control group.

Experimental Group

The group in an experimental study that receives the treatment or intervention being tested.

Control Group

A group in an experiment that does not receive the treatment or intervention being tested, allowing for comparison with the experimental group.

Open-ended Interviews

A qualitative research technique involving unstructured conversations that allow for an exploration of the interviewee's thoughts and feelings without predefined answers.