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What type of design is being illustrated?

Using the data provided in graph, what is the dependent variable?

Which of the following best describes the interaction effect between participant gender and type of commercial?

High experimental control in a laboratory study often leads to which of the following drawbacks?

Which of the following is a potential confound in Dr. Lonsbary’s study?

Dr. Alfonse, a developmental psychologist, conducts a study to determine whether children prefer books with drawn illustrations or with photographs. A group of 30 preschoolers are shown two copies of the book, Ferdinand the Bull, at the same time. Although the story is the same, one book is illustrated with drawings and the other is illustrated with photos. Children are then asked to point to the book that they prefer. What type of design is this study?

A within-groups design means that:

What type of design is this study?

Suggest a way to improve the external validity problem you listed. Explain why your solution would improve the external validity of her study.

Dr. Dormeur wants to replicate her study to address problems with her laboratory study. She provides her participants with a sleep-tracking bracelet so participants can complete the study from the comfort of their home. She asks participants to report their typical bedtime and then texts participants 10 minutes before their reported bedtime every three days over the course of two weeks. Participants are asked to complete a 10-minute survey from their phone while in bed. She examines the time to fall asleep on days when participants are texted before bed and days when they are not texted before bed. By changing the setting of her study, she is attempting to: