To estimate Cohen's d, we take the difference between two means and then divide by the standard deviation.

. A car manufacturer wants to make some cost-saving changes in the paint used on new cars. However, company officers do not want the changes to be detected by potential purchasers on the showroom floor

The manufacturer asks a psychologist to conduct research to help make the decision about the paint. What concept will prove most helpful in addressing the issue the manufacturer has raised? a) adaptation b) transduction c) absolute threshold d) differential threshold

Your college roommate is experiencing insomnia. Explain some changes she could make in her life as well as some techniques she could use to get a "good night's sleep."

What will be an ideal response?