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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