Posted: September 20th, 2022

Research

Refer to the following excerpt from a hypothetical research article that compared memory test performance between two groups of participants: those who consumed a caffeinated beverage before the test and those who consumed a non-caffeinated beverage:

An independent samples t-test was conducted to examine the difference between experimental conditions on test performance. The results indicated a significant difference between participants who consumed the caffeinated beverage and participants who did not, with participants in the caffeinated group (
M = 7.64, 
SD = 2.41) performing worse than participants in the non-caffeinated group (
M = 9.81, 
SD = 3.16), 
t(97) = 2.14, 
p < .05.

Write a brief paper explaining what the author means when she says that the results were statistically significant. In other words, what does it mean to say that results are statistically significant? Be sure to explain what a p value is and how it relates to statistical significance.
As a reminder, 
M stands for mean, 
SD stands for standard deviation, the 
t indicates that this was a t-test, and the 
p represents the p value. You can refer to page 353 of your textbook, 
Discovering Statistics Using IBM SPSS Statistics, for help interpreting the statistical results listed in the excerpt, but that may not be necessary.

Rubic

28 points
Understanding is evident, though some confusion or lack of clarity is also evident

Criteria

Exemplary

Proficient

Needs Improvement

Not Evident

Criterion Score

Description of Statistical Significance

4

0 points

Meets “Proficient” criteria, and explanation succinct and needs no clarification

36 points

Clearly and accurately describes the meaning of statistical significance

28 points

Understanding is evident, though some confusion or lack of clarity is also evident

0 points

No explanation, or it is evident that the writer does not understand statistical significance

Score of Description of Statistical Significance,

/ 40

Explanation of P Value

40 points

Meets “Proficient” criteria, and explanation is succinct and needs no clarification

36 points

Clearly and accurately describes the meaning of p-value

0 points

No explanation, or it is evident that writer does not understand p-values

Score of Explanation of P Value,

/ 40

Articulation of Response

20 points

Submission is free of errors related to citations, grammar, spelling, syntax, and organization and is presented in a professional and easy-to-read format

18 points

Submission has no major errors related to citations, grammar, spelling, syntax, or organization

14 points

Submission has major errors related to citations, grammar, spelling, syntax, or organization that negatively impact readability and articulation of main ideas

0 points

Submission has critical errors related to citations, grammar, spelling, syntax, or organization that prevent understanding of ideas

Score of Articulation of Response,

/ 20

Total

Score of PSY 520 Short Paper 1 Rubric,

/ 100

Overall Score

Points earned out of 100

91 points minimum

The overall submission earned 91 points or more. Final calculation of grades can be found in the gradebook.

Points earned out of 100

71 points minimum

The overall submission earned 71 points or more. Final calculation of grades can be found in the gradebook.

Points earned out of 100

1 point minimum

The overall submission earned 1 points or more. Final calculation of grades can be found in the gradebook.

Points earned out of 100

0 points minimum

The overall submission earned 0 points or more. Final calculation of grades can be found in the gradebook.

  • PSY 520 Short Paper 1 Guidelines and Rubric
  • Refer to the following excerpt from a hypothetical research article that compared memory test performance between two groups of participants: those who
    consumed a caffeinated beverage before the test and those who consumed a non-caffeinated beverage:

    An independent samples t-test was conducted to examine the difference between experimental conditions on test performance. The results indicated a
    significant difference between participants who consumed the caffeinated beverage and participants who did not, with participants in the caffeinated
    group (M = 7.64, SD = 2.41) performing worse than participants in the non-caffeinated group (M = 9.81, SD = 3.16), t(97) = 2.14, p < .05.

    Write a brief paper explaining what the author means when she says that the results were statistically significant. In other words, what does it mean to say that
    results are statistically significant? Be sure to explain what a p value is and how it relates to statistical significance.

    As a reminder, M stands for mean, SD stands for standard deviation, the t indicates that this was a t-test, and the p represents the p value. You can refer to page
    353 of your textbook, Discovering Statistics Using IBM SPSS Statistics, for help interpreting the statistical results listed in the excerpt, but that may not be
    necessary.

    Guidelines for Submission: Submit a 1–2-page document with double spacing, 12-point font, and one-inch margins, with any sources referenced cited in APA
    format.

    Critical Elements Exemplary (100%) Proficient (90%) Needs Improvement (70%) Not Evident (0%) Value

    Description of
    Statistical Significance

    Meets “Proficient” criteria, and
    explanation succinct and needs
    no clarification

    Clearly and accurately describes
    the meaning of statistical
    significance

    Understanding is evident,
    though some confusion or lack
    of clarity is also evident

    No explanation, or it is evident
    that the writer does not
    understand statistical
    significance

    40

    Explanation of P
    Value

    Meets “Proficient” criteria, and
    explanation is succinct and
    needs no clarification

    Clearly and accurately describes
    the meaning of p-value

    Understanding is evident,
    though some confusion or lack
    of clarity is also evident

    No explanation, or it is evident
    that writer does not understand
    p-values

    40

    Articulation of
    Response

    Submission is free of errors
    related to citations, grammar,
    spelling, syntax, and
    organization and is presented
    in a professional and easy-to-
    read format

    Submission has no major errors
    related to citations, grammar,
    spelling, syntax, or organization

    Submission has major errors
    related to citations, grammar,
    spelling, syntax, or organization
    that negatively impact
    readability and articulation of
    main ideas

    Submission has critical errors
    related to citations, grammar,
    spelling, syntax, or organization
    that prevent understanding of
    ideas

    20

    Earned Total 100%

      PSY 520 Short Paper 1 Guidelines and Rubric

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    Passed
    Appropriate nesting

    Document

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