chapter 10 comprehension

Which of the following is a control variable in Dr. Lonsbary’s study?

• the number the participant rolled on the dice

• the type of song

• the amount of time allowed for memorizing the words

• the mood of the participants

In Dr. Lonsbary’s study, which of the following is NOT present?

• a control variable

• a treatment group

• a placebo group

• a manipulation check

Dr. Lonsbary’s colleague, Dr. Chavis, recommended randomly assigning the participants to the three groups. His recommendation was designed to avoid which of the following?

• an order effect

• a selection effect

• a practice effect

• a carryover effect

Dr. Lonsbary is considering doing a follow-up study in which instead of asking participants to listen to music to induce mood, she has them write either a story about a character who just won the lottery or a story about a character who just experienced the death of their spouse. This change in the mood variable is designed to enhance the study’s ________ validity.

• external

• statistical

• internal

• construct

Prior to conducting the current study, Dr. Lonsbary asked her research assistant to use the same mood manipulation with a sample of 30 college students to determine if people’s moods really did change after listening to the music. This preliminary study is known as a ________ study.

• pretest/posttest

• concurrent measure

• pilot

• pretest-only