rm1 final

In psychological science, the term experiment specifically means that the researcher manipulates both variables.

False

Which of the following is true of control variables?

Control variables are kept the same for all participants.

A design in which participants are exposed to all the levels of an independent variable at roughly the same time and a single attitudinal or behavioral preference is the dependent variable is known as a(n)

concurrent-measures design.

What is the primary difference between pretest/posttest designs and within-groups designs?

the number of levels of the independent variable participants are exposed to

In true experiments,________ is to dependent variable as ________ is to independent variable.

measuring; manipulating

Which of the following phrases describes a manipulated variable?

Participants were placed in the high tempo music condition, the low tempo music condition, or the no music condition based on which color card they randomly drew from a deck.”

The figure below depicts which type of research design?

pretest/posttest design

I recently put two cups in front of my dog. I hid treats under each cup. I randomly selected one cup and pointed to it to see if that would influence which cup my dog would knock over first. What kind of design is this?

concurrent measures

An independent-groups design is also known as a design __________.

between-subjects

A type of within-groups design in which participants are measured on a dependent variable more than once, after exposure to each level of the independent variable is known as matched-participants design.

False

According to the textbook, why is it important to study interactions?

Many outcomes in psychology are interactions

The mathematical way to describe an interaction is a difference in differences.

True

Dr. Rhodes notices an interaction in his factorial study. In describing this, which statement might he use to explain the link between Independent Variable A and Independent Variable B in predicting the dependent variable?

The effect of Variable A depends on Variable B.

The number of main effects that need to be examined is ________ the number of independent variables.

equal to

Dr. Gavin is conducting a 2 × 4 independent-groups factorial design. How many main effects will Dr. Gavin need to examine?

2

Dr. Gavin is conducting a 2 × 4 independent-groups factorial design. Assuming he wants 25 people in each cell, how many participants does Dr. Gavin need to recruit?

200

Which of the following can be said of the interaction in a study?

It can exist even if the main effects are not significant

Imagine that you are reading a journal article and you see the following sentence: “The study used a 2 × 2 × 4 design.” Where are you likely to have encountered this sentence?

the Method section

What is the difference between a main effect and an overall effect?

There is no difference between main effects and overall effects.