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Psychology Assignment

Please follow the instructions, Ask questions, When not cleared. No AI . Thanks so much for this

Due Sep 28 by 10:59pm
Points 55
Submitting a text entry box or a file upload
Attempts 0
Allowed Attempts 2

Start Assignment

 Back to Week at a Glance
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EXPERIMENTAL RESEARCH RESULTS:
STATISTICAL INFERENCE

Correlational research, which you explored in this week’s Discussion, is useful in identifying relations
between two variables. But correlational research does not answer questions regarding “cause and
effect” among the variables because researchers did not control for outside factors. As you have
explored in previous weeks, to demonstrate possible causal relations among variables, researchers
will need to manipulate variables in an experimental research design.

In previous weeks, you have practiced generating a hypothesis. Another step in becoming a skilled
researcher is possessing sound knowledge of theoretical concepts related to testing a hypothesis to
determine if it is plausible. In this Assignment, you will apply key concepts related to experimental
design, including hypothesis testing, applying inferential statistics, and analyzing and interpreting the
outcome of the study.

(

media.waldenu.edu/2dett4d/Walden/Canvas/Adobe/OrigImage-
LgRendition/AdobeStock_568584513.jpeg)

RESOURCES

To prepare:

Read Chapter 13 and review previous chapters for additional support, if necessary.
Read the following study scenario:

Researchers are interested in the effectiveness of a particular treatment for
insomnia. They contacted 50 insomnia sufferers who responded to a newspaper
advertisement to participate in the study. Each participant is given a pill with
instructions to take it before going to sleep that night. The pill contains milk powder
(a placebo). The participants are randomly assigned to receive one of two sets of
instructions about the pill. One half of the participants is told that the pill will make
them feel “sleepy,” and the other half is told that the pill will make them feel “awake
and alert.” The next day, the participants return to the lab and are asked to indicate
how long it took them to fall asleep after taking the pill. The individuals who were
told that the pill would make them feel sleepy reported that they fell asleep faster
than the participants who were told the pill would make them feel alert.

As needed, review Learning Resources from previous weeks about hypothesis testing and
identification of independent and dependent variables in a hypothesis.
Think about how this week’s concepts apply to the study above.

Null hypothesis
Research hypothesis (also termed alternative hypothesis)
Type I and Type II errors

Be sure to review the Learning Resources before completing this activity.

Review previous chapters if you need to (e.g., Chapter 2 on
hypotheses and predictions and/or Chapter 4 on nonexperimental
versus experimental research, independent and dependent variables,
etc.)

Cozby, P. C., & Bates, S. C. (2024). Methods in behavioral
research (15th ed.). McGraw Hill.

Chapter 13, “Understanding Research Results: Statistical
Inference”

Readings 

PSYC_3003_Week5_Assignment_Rubric

Analysis of variance (ANOVA)
Statistical significance and effect size

Submit a 1- to 2-page paper that responds to the following:

With the study scenario in mind, do the following:

Identify the independent variable and dependent variable.
State the null hypothesis and the alternative hypothesis.
Explain what the researchers would conclude if a Type I error occurred in this study.
Explain what the researchers would conclude if a Type II error occurred in this study.

Note: Until this point, there have been two conditions in the study scenario.

Next, presume a third condition was added to the study in which participants are not given
any information about the effects of the (placebo) pill. Suppose an analysis of variance
(ANOVA) was conducted for the three conditions. Briefly interpret, in your own words, what
it would mean if the F value for this sleep study was deemed statistically significant.

Do not copy or retype the example study scenario into your Assignment.

Note: Support your responses within your Assignment with evidence from the assigned
Learning Resources. Provide a reference list for resources you used for this Assignment. Use
APA style for in-text citations and references.

Before submitting your final assignment, you can check your draft for authenticity. To check
your draft, access the Turnitin Drafts from the Start Here area.

1. To submit your completed assignment, save your Assignment as
WK5Assgn_LastName_FirstInitial

2. Then, click on Start Assignment near the top of the page.
3. Next, click on Upload File and select Submit Assignment for review.

BY DAY 7

SUBMISSION INFORMATION

Criteria Ratings Pts

Identification
of the
independent
and
dependent
variable in
the study
scenario

5 pts

Identification
of the null
hypothesis
and the
alternative
hypothesis in
the study
scenario

10 pts

Explanation
of what the
researchers
would
conclude if a
Type I error
occurred in
this study

10 pts

5 pts
A

Response is
complete and
accurate;
contains
sufficient
details and/or
explanation.

4.25 pts
B

Response is
complete and
mostly
accurate;
contains some
details and/or
explanation.

3.75 pts
C

Response is
somewhat
complete
and/or is
somewhat
accurate;
and/or does
not contain
sufficient
details and/or
explanation.

3.25 pts
D

Response is
incomplete or
is mostly
inaccurate;
lacks sufficient
details and/or
explanation.

0 pts
F

Response is
incomplete or
not provided;
answers are
inaccurate
and/or not
explained.

10 pts
A

Response is
complete and
accurate;
contains
sufficient
details and/or
explanation;
includes
supporting
information
from the
Learning
Resources.

8.5 pts
B

Response is
complete and
mostly
accurate;
contains some
details and/or
explanation;
includes
supporting
information
from the
Learning
Resources.

7.5 pts
C

Response is
somewhat
complete
and/or is
somewhat
accurate;
and/or does
not contain
sufficient
details and/or
explanation;
includes some
supporting
information
from the
Learning
Resources.

6.5 pts
D

Response is
incomplete or
is mostly
inaccurate;
lacks sufficient
details and/or
explanation;
does not
include
supporting
information
from the
Learning
Resources.

0 pts
F

Response is
incomplete or
not provided;
answers are
inaccurate
and/or not
explained;
does not
include
supporting
information
from the
Learning
Resources.

10 pts
A
Response is
complete and
accurate;
contains
sufficient
details and/or
explanation;
includes

8.5 pts
B
Response is
complete and
mostly
accurate;
contains some
details and/or
explanation;
includes

7.5 pts
C
Response is
somewhat
complete
and/or is
somewhat
accurate;
and/or does
not contain

6.5 pts
D
Response is
incomplete or
is mostly
inaccurate;
lacks sufficient
details and/or
explanation;
does not

0 pts
F
Response is
incomplete or
not provided;
answers are
inaccurate
and/or not
explained;
does not

Criteria Ratings Pts

Explanation
of what the
researchers
would
conclude if a
Type II error
occurred in
this study

10 pts

Interpretation
of the
meaning of a
statistically
significant F
value from
an ANOVA if
a third
condition
were added
to the study

10 pts

supporting
information
from the
Learning
Resources.

supporting
information
from the
Learning
Resources.

sufficient
details and/or
explanation;
includes some
supporting
information
from the
Learning
Resources.

include
supporting
information
from the
Learning
Resources.

include
supporting
information
from the
Learning
Resources.

10 pts
A
Response is
complete and
accurate;
contains
sufficient
details and/or
explanation;
includes
supporting
information
from the
Learning
Resources.

8.5 pts
B
Response is
complete and
mostly
accurate;
contains some
details and/or
explanation;
includes
supporting
information
from the
Learning
Resources.

7.5 pts
C
Response is
somewhat
complete
and/or is
somewhat
accurate;
and/or does
not contain
sufficient
details and/or
explanation;
includes some
supporting
information
from the
Learning
Resources.

6.5 pts
D
Response is
incomplete or
is mostly
inaccurate;
lacks sufficient
details and/or
explanation;
does not
include
supporting
information
from the
Learning
Resources.

0 pts
F
Response is
incomplete or
not provided;
answers are
inaccurate
and/or not
explained;
does not
include
supporting
information
from the
Learning
Resources.

7.5 pts
C

Response is
somewhat
complete
and/or is
somewhat
accurate;
and/or does
not contain
sufficient
details and/or
explanation;
includes some
supporting

6.5 pts
D

Response is
incomplete or
is mostly
inaccurate;
lacks sufficient
details and/or
explanation;
does not
include
supporting
information
from the

0 pts
F

Response is
incomplete or
not provided;
answers are
inaccurate
and/or not
explained;
does not
include
supporting
information
from the

Criteria Ratings Pts

Quality of
Writing

10 pts

Total Points: 55

10 pts
A
Response is
complete and
accurate;
contains
sufficient
details and/or
explanation;
includes
supporting
information
from the
Learning
Resources.

8.5 pts
B
Response is
complete and
mostly
accurate;
contains some
details and/or
explanation;
includes
supporting
information
from the
Learning
Resources.

information
from the
Learning
Resources.

Learning
Resources.

Learning
Resources.

10 pts
A

Writing is clear
and organized
with few or no
errors in
mechanics,
usage,
grammar, or
spelling
(MUGS).
There is a
preponderance
of original
writing (i.e.,
use of own
words and
proper
paraphrasing).
Information
from the
Learning
Resources is
fully provided
and correctly
documented
with citation(s)
and
reference(s) in
correct APA
style.

8.5 pts
B

Writing is
mostly clear
and organized
with few
MUGS errors.
Writing is
original (i.e.,
use of own
words and
proper
paraphrasing).
Information
from the
Learning
Resources is
mostly
provided and
correctly
documented
with citation(s)
and
reference(s) in
correct APA
style.

7.5 pts
C

Writing is
somewhat
clear and
organized with
some MUGS
errors. Most
writing is
mostly original
(i.e., use of
own words
and proper
paraphrasing)
but may rely
on the use of
some direct
quotations.
Information
from the
Learning
Resources is
partially
provided
and/or
incorrectly
documented
with citation(s)
and/or
reference(s),
and/or
citations(s)
and
reference(s)
do not follow
correct APA
style.

6.5 pts
D

Writing is
mostly unclear
and
disorganized
and/or
contains many
MUGS errors.
There is an
overuse of
direct
quotations
and/or
ineffective
paraphrasing.
Information
from the
Learning
Resources is
significantly
lacking and/or
is incorrectly
documented
and/or
citation(s) and
reference(s)
do not follow
correct APA
style.

0 pts
F

Writing is
mostly unclear
and/or mostly
disorganized
and/or
contains many
MUGS errors.
There is an
underuse of
original writing
and an
overuse of
directly quoted
content.
Information
from the
Learning
Resources is
absent and/or
is not cited or
referenced in
any way.

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