A Psychologist Is Interested Looking at the Effectiveness of a New

question 226

Multiple Choice

A psychologist is interested looking at the effectiveness of a new computer program in helping students learn math.She decides to test this new program with a group of middle school students.At this particular school,the boys and girls tend to be disruptive when they are in the same classroom,so she decides to run them in separate groups in the experiment.She creates a group of boys who each use the computer program four times per week.She creates a group of girls to serve as a comparison group and they not get the computer program.This experimental design is flawed because gender is a confounding variable and as a result the following has been lowered:

• A)internal validity
• B)external validity
• C)internal reliability
• D)external reliability

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Definitions:

Intelligence

The ability to learn from experience, solve problems, and use knowledge to adapt to new situations.

Adolescents

Individuals in the transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood.

Heritability

The proportion of observed variation in a particular trait (as within a population) that can be attributed to inherited genetic factors in contrast to environmental ones.

Genetic Variability

The variation in the DNA sequence in each of our genomes, which is a key factor in the biological diversity among individuals and populations.