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PSYC 3110
Scientific Inquiry in Psychology
Homework 5
Instructions
Answer the following short-answer questions. All answers should be in
complete sentences and free from proofreading errors. You should not need
more than a paragraph to answer each question. Remember that more isn’t
necessarily better.
Do not include the homework questions in your submission. Just give the
question number and your answer.
All sentences and ideas are assumed to be your own unless you cite your
source. Using someone else’s work without attribution is plagiarism and will
result in an F in the course. Please note that artificial intelligence is not
permitted for this assignment. See the “Artificial Intelligence” section for
more details.
Questions
1. Use the scatterplot shown in Figure 1 to answer this question.
a. There are some points in the top left of Figure 1. Did participants in
the top left of the graph score high or low on x? Did they score high or low
on y?
b. There are some points in the bottom right of Figure 1. Did participants
in the bottom right of the graph score high or low on x? Did they score high
or low on y?
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Figure 1:
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Question 1 Scatterplot
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c. Does Figure 1 depict a positive, negative, zero, or curvilinear relationship between x and y? How do you know?
d. Consider the scatterplot shown in Figure 3. Does Figure 1 depict a
stronger or weaker correlation than Figure 3? Explain.
2. Use the scatterplot shown in Figure 2 to answer this question.
a. There are some points in the bottom left of Figure 2. Did participants
in the bottom left of the graph score high or low on x? Did they score high
or low on y?
b. There are some points in the top right of Figure 2. Did participants in
the top right of the graph score high or low on x? Did they score high or low
on y?
c. Does Figure 2 depict a positive, negative, zero, or curvilinear relationship between x and y? How do you know?
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Figure 2:
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Question 2 Scatterplot
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d. Consider the scatterplot shown in Figure 3. Does Figure 2 depict a
stronger or weaker correlation than Figure 3? Explain.
3. Spencer has just developed a new measure of emotional intelligence.
Because his measure is new, he needs to ensure its reliability. Spencer assesses
its test-retest reliability by administering the survey to 19 undergraduate
students. Every student takes the survey twice. His results are plotted in
Figure 4.
Does Spencer’s measure of emotional intelligence have test-retest reliability? Explain.
4. Can a measure be reliable but not valid? Explain.
5. Can a measure be valid but not reliable? Explain.
A Note on Plagiarism
You are assumed to be familiar with CSUB’s policy on academic integrity.
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Figure 3:
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Comparison (Baseline) Scatterplot
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Figure 4:
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Time 2 Scores
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Test-Retest Reliability of Spencer’s Emotional-Intelligence Survey
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Time 1 Scores
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Intentional or accidental violation of the policy constitutes academic dishonesty (cheating) and will result in an F in the course. Please never cheat—it
is not worth it!
Artificial Intelligence
You are explicitly prohibited from using artificial intelligence, including
tools like ChatGPT, to complete this assignment. Engaging in such practices
would not only constitute academic dishonesty but also have severe academic
consequences, including receiving a failing grade (F) for the course, being referred to the Dean of Students Office, and having a permanent mark attached
to your academic record. While I cannot guarantee that I will detect every
use of artificial intelligence, I urge you to consider the long-term effects and
ethical implications of dishonest behavior.
Here are some compelling reasons why utilizing artificial intelligence in
this course is counterproductive:
• Learning opportunity: The homework assignments provide a low-stakes
opportunity for you to identify your strengths and areas for improvement. Relying on artificial intelligence deprives you of this opportunity,
leading to inadequate preparation for more significant assessments such
as in-class quizzes, midterms, activities, and the final exam.
• Inaccuracies: Artificial-intelligence tools may not provide accurate solutions to all of the complex problems covered in this course. Repetitive
errors resembling artificial-intelligence-generated content will be con5
sidered a violation of CSUB’s policy on academic integrity.
• Synonyms and terminology: Artificial intelligence often uses various
synonyms for research-methods terms. Using terminology not covered
in the course material may indicate artificial-intelligence use or unauthorized external sources (remember that all external sources utilized
must be appropriately cited).
These guidelines sound harsh, although that is not my intention. I am
committed to your education: I sincerely want you to gain the skills required
by this class (and which you will need for your upper-division psychology
courses). To that end, the ban on artificial intelligence is necessary. If you have
any questions, please do not hesitate to get in touch. Email: [email protected]
Text: 302-219-4752
Acceptable File Formats
This assignment must be completed electronically using a text-based file
format. Because I am blind, there are limitations imposed on me by the
screen-reading software I use. Pictures are completely inaccessible, so do not
write your answers by hand and take a picture. Instead, type your answers in
a word processor and submit that file. The following file formats are permissible: doc, docx, rtf, txt, and pages. Note that pdf files will not be accepted.
Submission Requirements
This assignment must be submitted on Canvas by 11:59 P.M. on Sunday,
March 10, 2024. Late submissions will not be accepted. Canvas is unforgiving,
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so make sure you give yourself plenty of time to submit—that is, don’t wait
until the last minute. If you submit at 12:00 A.M. instead of 11:59 P.M.,
Canvas will not allow you to upload your assignment.
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Question 1 Scatterplot
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Question 2 Scatterplot
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Comparison (Baseline) Scatterplot
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Time 2 Scores
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Test-Retest Reliability of Spencer’s Emotional-Intelligence Survey
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Time 1 Scores
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