19 Sep Refer to the following excerpt from a hypothetical
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
|
Criteria |
Exemplary |
Proficient |
Needs Improvement |
Not Evident |
Criterion Score |
|
Description of Statistical Significance |
40 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 |
28 points Understanding is evident, though some confusion or lack of clarity is also evident |
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
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