PSYCH 290 FINAL EXAM COMPLETE
QUESTIONS AND ANSWERS | ALREADY
PASSED | LATEST UPDATE 2026
Deci and Ryan proposed that 3 fundamental needs are required for human growth
and fulfillment: relatedness, autonomy, and competence. Susan thinks that if
students have certain needs met in psychology class, such as relatedness or
autonomy, they will feel happier and more satisfied with the class then if they do
not.
Deci and Ryan are describing a ____ while Susan is describing a _____
Theory, hypothesis
What is the difference between a main effect and an interaction?
Main effects examine one independent variable at a time; interaction effects examine
how multiple independent variables interact.
Dr. Gloss runs two experiments. In the first experiment, she finds that a t-test run
on two groups of subjects produces a p value of .10. In her second experiment
she uses the exact same methods from the first experiment on two different
groups of subjects. She finds that the difference between group means and the
variance of each group is exactly the same as the first experiment but she now
has a p value of .01. What would you explain the difference in p values?
An increase in the number of subjects
,Randall is trying to determine if adding chocolate on top of his pastries increases
his sales. On Saturday, he only sells pastries without chocolate while on Sunday,
he only sells pastries topped with chocolate. He finds that he sells much more
pastries on Sunday when they are topped with chocolate. What type of
experimental design is Randall using?
Nonequivalent control group design
Which of the following is not applicable to single-N studies in cases such as brain
damage or lesions?
The use of t-tests comparing groups
Kelly runs an experiment assessing the self-confidence of a single group of
adolescents from ages 12-17. She uses the same assessment for all subjects and
finds that self-confidence increases with the number of years they attend high
school. She determines that attending high school increases self-confidence.
What type of threat to internal validity would be the best alternative explanation
for her findings?
Maturation
Sandra measures the level of happiness across two groups of subjects two
weeks apart. One group receives a behavioral intervention aimed at improving
happiness while the other group does not. She uses the same happiness
assessment at both time points. She finds that the experimental group had
normal levels of happiness before the intervention that moderately increased
after the intervention. In the control group that did not receive the intervention,
, she finds unusually high levels of happiness that went down to normal two week
later. What might explain her results for the control group?
Regression to the mean
John wants to determine if consuming caffeine increases cognitive task
performance. He gives half of his participants a bottle of water and half of his
participants a bottle of cola. He then them solve 25 math problems. He finds that
people who drank caffeine solve more problems than those who drank water. His
lab mate Gary decides to conduct the exact same study again to ensure that he
can find the same difference between the groups a second time. However, this
time he uses coffee instead of cola as a source of caffeine. This study is known
as a
Conceptual replication
Linda is interesten in examining the relationship between daily stress and
cardiovascular health for her senior psychology research project. She decides to
conduct a meta-analysis rather than a review paper. What will Linda NOT do when
conducting her meta-analysis?
Measure daily stress and cardiovascular health in several new samples of participants
In typical psychology studies comparing how different samples of people behave,
we are interested in how ____ behave(s). In single-n studies, we are interested in
how ____ behave(s).
Groups, a single person
Your friend Dominic is complaining about having the Police Academy Exam
(PAE), a test the is required to enter the police force. He complains, "Tests like
QUESTIONS AND ANSWERS | ALREADY
PASSED | LATEST UPDATE 2026
Deci and Ryan proposed that 3 fundamental needs are required for human growth
and fulfillment: relatedness, autonomy, and competence. Susan thinks that if
students have certain needs met in psychology class, such as relatedness or
autonomy, they will feel happier and more satisfied with the class then if they do
not.
Deci and Ryan are describing a ____ while Susan is describing a _____
Theory, hypothesis
What is the difference between a main effect and an interaction?
Main effects examine one independent variable at a time; interaction effects examine
how multiple independent variables interact.
Dr. Gloss runs two experiments. In the first experiment, she finds that a t-test run
on two groups of subjects produces a p value of .10. In her second experiment
she uses the exact same methods from the first experiment on two different
groups of subjects. She finds that the difference between group means and the
variance of each group is exactly the same as the first experiment but she now
has a p value of .01. What would you explain the difference in p values?
An increase in the number of subjects
,Randall is trying to determine if adding chocolate on top of his pastries increases
his sales. On Saturday, he only sells pastries without chocolate while on Sunday,
he only sells pastries topped with chocolate. He finds that he sells much more
pastries on Sunday when they are topped with chocolate. What type of
experimental design is Randall using?
Nonequivalent control group design
Which of the following is not applicable to single-N studies in cases such as brain
damage or lesions?
The use of t-tests comparing groups
Kelly runs an experiment assessing the self-confidence of a single group of
adolescents from ages 12-17. She uses the same assessment for all subjects and
finds that self-confidence increases with the number of years they attend high
school. She determines that attending high school increases self-confidence.
What type of threat to internal validity would be the best alternative explanation
for her findings?
Maturation
Sandra measures the level of happiness across two groups of subjects two
weeks apart. One group receives a behavioral intervention aimed at improving
happiness while the other group does not. She uses the same happiness
assessment at both time points. She finds that the experimental group had
normal levels of happiness before the intervention that moderately increased
after the intervention. In the control group that did not receive the intervention,
, she finds unusually high levels of happiness that went down to normal two week
later. What might explain her results for the control group?
Regression to the mean
John wants to determine if consuming caffeine increases cognitive task
performance. He gives half of his participants a bottle of water and half of his
participants a bottle of cola. He then them solve 25 math problems. He finds that
people who drank caffeine solve more problems than those who drank water. His
lab mate Gary decides to conduct the exact same study again to ensure that he
can find the same difference between the groups a second time. However, this
time he uses coffee instead of cola as a source of caffeine. This study is known
as a
Conceptual replication
Linda is interesten in examining the relationship between daily stress and
cardiovascular health for her senior psychology research project. She decides to
conduct a meta-analysis rather than a review paper. What will Linda NOT do when
conducting her meta-analysis?
Measure daily stress and cardiovascular health in several new samples of participants
In typical psychology studies comparing how different samples of people behave,
we are interested in how ____ behave(s). In single-n studies, we are interested in
how ____ behave(s).
Groups, a single person
Your friend Dominic is complaining about having the Police Academy Exam
(PAE), a test the is required to enter the police force. He complains, "Tests like
