PSYC 355 SPSS HOMEWORK 1 INSTRUCTIONS: SINGLE-SAMPLE T-TESTS AND PAIRED-SAMPLE T-TESTS When submitting this file, be sure the filename includes your full name, course, and section. Example: HW1_JohnDoe_355B03 Part One: Please note that for all problems in this course, the standard cut-off for a test of significance will be p < .05 unless otherwise noted in the problem. 1. Single-Sample t test: based on Green and Salkind Lesson 22 Exercise 1-4, but follow the instructions below instead. Open the Lesson 22 Exercise File found in Blackboard Course content (under Course Guides and Assignment Instructions>Assignment Instructions>SPSS Homework 1>SPSS Homework 1 Files>Mod1_Lesson 22 Exercise File 1). Always use the Blackboard files instead of the files on the Green and Salkind website as some files have been modified for the purposes of this course. 1. A total score variable is included in the data file in Blackboard (\"tot_score\"), so you do not have to compute it. Use this variable as your dependent variable. 2. The test value for the single-sample t-test is 2 (1/4 of 8, or the score which a student would achieve by chance). Use 2 as the test value when running the analysis for this exercise. 3. Conduct a single-sample t-test on the total score variable. Paste the output into your Microsoft Word document and type in the answers to the following questions underneath the output: (2 pts for output) a. Mean algebra score (2 pts) b. t test value (the result of the t test, not the \"test value\" which is already given) (2 pts) c. p value (significance) of the test (2 pts) 4. Write a current APA-style Results section based on your analysis. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (2 pts) 5. Create a histogram that demonstrates the distribution of scores. Be sure to correctly label the X and Y axes and give your graph a title. (2 pts) 2. Green and Salkind Lesson 23 Exercises 6-8: (Lesson 23 Exercise File 1) The following helpful tips are numbered to correspond with the exercise number to which they refer within the Green and Salkind text: 6. Instead of identifying these values on your output, as the text states, please write them into your Microsoft Word file as written answers for #6 a, b, c, and d. (output = 2 pts; a-d = 2 pts. each) Page 1 of 3 PSYC 355 7. Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (3 pts) 8. You will create the boxplot here instead of in the Results section. (2 pts) Part Two: 1. A counseling psychologist administers an interview assessment that screens for possible internet addiction to his adolescent clients who live in a rural area. He assumes that children in this area may exhibit higher scores than children in the general population, who normally score a 20 on a scale of 1-100. The table below shows the scores the counselor has collected. Using the table, enter the data into a new SPSS file and conduct a single sample t-test to evaluate whether or not these adolescents scored higher than the general population. The steps will be the same as the ones you have been practicing in Part One of the assignment the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the \"Variable View,\" then return to the \"Data View\" to enter the data. Internet Addiction Interview Scores 22 57 63 17 10 18 9 51 46 9 23 3 18 55 12 27 a) Paste SPSS output (2 pts) b) Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (3 pts) Page 2 of 3 PSYC 355 c) Create a histogram that demonstrates the distribution of scores. Be sure to correctly label the X and Y axes. (2 pts) 2. A clinical psychologist is studying the differences in the number of Facebook friends between identical twins raised apart. She believes that twins raised in different environments will have differences in the number of friends, which would help point to the influence of environmental factors over inherited factors on social outcomes. She divides the twins into two groups (\"Twin 1\" and \"Twin 2\"), collects the data, and creates the table below. Using this table, enter the data into a new SPSS data file and run a paired-samples t test to test the claim that the identical twins raised apart will have a significantly different number of Facebook friends. The steps will be the same as the ones you have been practicing in Part One of the assignment the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the \"Variable View,\" then return to the \"Data View\" to enter the data. Twin 1 Twin 2 a) Paste SPSS output (2 pts) b) Write a current APA-style analysis. All homework example given in the SPSS document \"Writing Results Format\" (note: you do not Remember to include a (2 pts) c) Create a boxplot comparing correctly label the X and Y Submit this assignment by 11:59 Module/Week 1. 254 64 91 78 89 178 47 205 21 90 136 19 40 212 231 55 196 61 119 43 79 180 61 116 101 87 126 51 56 247 70 29 Results section based on your \"Results sections\" must follow the tutorials and the Course Content of Statistical Tests in Current APA have to refer to a figure). decision about the null hypothesis. the twins' scores. Be sure to axes. (2 pts) p.m. (ET) on Monday of Page 3 of 3 PSYC 355 SPSS HOMEWORK 1 INSTRUCTIONS: SINGLE-SAMPLE T-TESTS AND PAIRED-SAMPLE T-TESTS When submitting this file, be sure the filename includes your full name, course, and section. Example: HW1_JohnDoe_355B03 Part One: Please note that for all problems in this course, the standard cut-off for a test of significance will be p < .05 unless otherwise noted in the problem. 1. Single-Sample t test: based on Green and Salkind Lesson 22 Exercise 1-4, but follow the instructions below instead. Open the Lesson 22 Exercise File found in Blackboard Course content (under Course Guides and Assignment Instructions>Assignment Instructions>SPSS Homework 1>SPSS Homework 1 Files>Mod1_Lesson 22 Exercise File 1). Always use the Blackboard files instead of the files on the Green and Salkind website as some files have been modified for the purposes of this course. 1. A total score variable is included in the data file in Blackboard (\"tot_score\"), so you do not have to compute it. Use this variable as your dependent variable. 2. The test value for the single-sample t-test is 2 (1/4 of 8, or the score which a student would achieve by chance). Use 2 as the test value when running the analysis for this exercise. 3. Conduct a single-sample t-test on the total score variable. Paste the output into your Microsoft Word document and type in the answers to the following questions underneath the output: (2 pts for output) a. Mean algebra score (2 pts) b. t test value (the result of the t test, not the \"test value\" which is already given) (2 pts) c. p value (significance) of the test (2 pts) 4. Write a current APA-style Results section based on your analysis. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (2 pts) 5. Create a histogram that demonstrates the distribution of scores. Be sure to correctly label the X and Y axes and give your graph a title. (2 pts) 2. Green and Salkind Lesson 23 Exercises 6-8: (Lesson 23 Exercise File 1) The following helpful tips are numbered to correspond with the exercise number to which they refer within the Green and Salkind text: 6. Instead of identifying these values on your output, as the text states, please write them into your Microsoft Word file as written answers for #6 a, b, c, and d. (output = 2 pts; a-d = 2 pts. each) Page 1 of 3 PSYC 355 7. Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (3 pts) 8. You will create the boxplot here instead of in the Results section. (2 pts) Part Two: 1. A counseling psychologist administers an interview assessment that screens for possible internet addiction to his adolescent clients who live in a rural area. He assumes that children in this area may exhibit higher scores than children in the general population, who normally score a 20 on a scale of 1-100. The table below shows the scores the counselor has collected. Using the table, enter the data into a new SPSS file and conduct a single sample t-test to evaluate whether or not these adolescents scored higher than the general population. The steps will be the same as the ones you have been practicing in Part One of the assignment the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the \"Variable View,\" then return to the \"Data View\" to enter the data. Internet Addiction Interview Scores 22 57 63 17 10 18 9 51 46 9 23 3 18 55 12 27 a) Paste SPSS output (2 pts) b) Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (3 pts) Page 2 of 3 PSYC 355 c) Create a histogram that demonstrates the distribution of scores. Be sure to correctly label the X and Y axes. (2 pts) 2. A clinical psychologist is studying the differences in the number of Facebook friends between identical twins raised apart. She believes that twins raised in different environments will have differences in the number of friends, which would help point to the influence of environmental factors over inherited factors on social outcomes. She divides the twins into two groups (\"Twin 1\" and \"Twin 2\"), collects the data, and creates the table below. Using this table, enter the data into a new SPSS data file and run a paired-samples t test to test the claim that the identical twins raised apart will have a significantly different number of Facebook friends. The steps will be the same as the ones you have been practicing in Part One of the assignment the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the \"Variable View,\" then return to the \"Data View\" to enter the data. Twin 1 Twin 2 a) Paste SPSS output (2 pts) b) Write a current APA-style analysis. All homework example given in the SPSS document \"Writing Results Format\" (note: you do not Remember to include a (2 pts) c) Create a boxplot comparing correctly label the X and Y Submit this assignment by 11:59 Module/Week 1. 254 64 91 78 89 178 47 205 21 90 136 19 40 212 231 55 196 61 119 43 79 180 61 116 101 87 126 51 56 247 70 29 Results section based on your \"Results sections\" must follow the tutorials and the Course Content of Statistical Tests in Current APA have to refer to a figure). decision about the null hypothesis. the twins' scores. Be sure to axes. (2 pts) p.m. (ET) on Monday of Page 3 of 3 \fPSYC 355 SPSS HOMEWORK 2 INSTRUCTIONS: INDEPENDENT SAMPLES T TESTS Part One: Green & Salkind: Lesson 24, Exercises 1-5 The following helpful tips are numbered to correspond with the exercise number to which they refer: 1. Type the t and p values out underneath your copied and pasted output. (3) 2. Instead of identifying these values on your output, as the text states, please write them into your Microsoft Word file as written answers for #2 a, b, and c. Letter c is basically asking, \"What are the results of Levene's test in the output (F and p values)?\" (3 pts.; 1 point for each letter) 3. The effect size statistic must be computed by hand (or calculator!). Use the second \"easier\" formula for d (containing t and N) found in the section on \"Effect Size Statistics\" in the Green and Salkind text in Lesson 24. (3) 4. Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (3) 5. Create a boxplot (not an error bar graph) using the following steps (covered also in Lesson 21) (3) a. Go to GraphsLegacy DialogsBoxplotSelect \"Simple\"Select \"Summaries for Groups of Cases\" b. Click \"Define\": Variable = \"Time Spent\" (this is your dependent variable) and Category Axis = \"Weight\" (this is your independent, or grouping, variable) c. OK Part Two: 1. A learning psychologist is interested in comparing the success of 2 different mnemonics (memorization methods) on performance in a memory task. He assigns students to two groups, one which learns and uses a language-based rhyming memory technique, and one which learns and uses a visual \"method of loci\" spatial memory technique. He then administers a memory task to each group of students. The students are scored based on the percentage of correct answers. Using the table below, enter the data into a new SPSS data file and use an independent-samples t test to analyze the claim that the two mnemonic styles are different. The steps will be the same as the ones you have been practicing in Part One of the assignmentthe only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the \"Variable View,\" then return to the \"Data View\" to enter the data. (3 for output) Page 1 of 3 PSYC 355 Table is shown below: Spatially-Based LanguageBased 83 89 67 95 76 63 89 84 93 93 77 99 87 78 62 87 90 95 2. Create a boxplot illustrating the differences between the 2 methods of language learning. (3) 3. Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (4) Part 3: Cumulative Homework 1. The effects of a new faith-based anxiety treatment program are studied in a group of elderly patients with Generalized Anxiety Disorder (GAD). One of the outcome measures is the Geriatric Anxiety Inventory (GAI) (Pachana et al., 2007), a measure with possible scores from 0-20, with higher scores indicating higher anxiety. A large group of elderly patients completed the GAI before treatment. Fifteen patients with GAI scores of 10 or higher were chosen to participate in the study. The patients underwent the treatment program and completed the GAI at the end of treatment. The scores are listed below. Do the elderly patients exhibit lessened anxiety, as demonstrated by their GAI scores, after participating in the faith-based treatment program? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis. Follow the directions under the table on the next page. GAI Score Before Treatment 11 GAI Score After Treatment 7 Page 2 of 3 PSYC 355 12 17 13 10 13 16 11 11 15 18 11 11 14 16 11 12 14 9 10 12 11 12 13 17 8 13 9 12 a) Paste appropriate SPSS output. (5) b) Paste appropriate SPSS graph. (5) c) Write an APA-style Results section based on your analyses. All homework \"Results sections\" should follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (5) Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 2. Page 3 of 3 PSYC 355 SPSS HOMEWORK 2 INSTRUCTIONS: INDEPENDENT SAMPLES T TESTS Part One: Green & Salkind: Lesson 24, Exercises 1-5 The following helpful tips are numbered to correspond with the exercise number to which they refer: 1. Type the t and p values out underneath your copied and pasted output. (3) 2. Instead of identifying these values on your output, as the text states, please write them into your Microsoft Word file as written answers for #2 a, b, and c. Letter c is basically asking, \"What are the results of Levene's test in the output (F and p values)?\" (3 pts.; 1 point for each letter) 3. The effect size statistic must be computed by hand (or calculator!). Use the second \"easier\" formula for d (containing t and N) found in the section on \"Effect Size Statistics\" in the Green and Salkind text in Lesson 24. (3) 4. Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (3) 5. Create a boxplot (not an error bar graph) using the following steps (covered also in Lesson 21) (3) a. Go to GraphsLegacy DialogsBoxplotSelect \"Simple\"Select \"Summaries for Groups of Cases\" b. Click \"Define\": Variable = \"Time Spent\" (this is your dependent variable) and Category Axis = \"Weight\" (this is your independent, or grouping, variable) c. OK Part Two: 1. A learning psychologist is interested in comparing the success of 2 different mnemonics (memorization methods) on performance in a memory task. He assigns students to two groups, one which learns and uses a language-based rhyming memory technique, and one which learns and uses a visual \"method of loci\" spatial memory technique. He then administers a memory task to each group of students. The students are scored based on the percentage of correct answers. Using the table below, enter the data into a new SPSS data file and use an independent-samples t test to analyze the claim that the two mnemonic styles are different. The steps will be the same as the ones you have been practicing in Part One of the assignmentthe only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the \"Variable View,\" then return to the \"Data View\" to enter the data. (3 for output) Page 1 of 3 PSYC 355 Table is shown below: Spatially-Based LanguageBased 83 89 67 95 76 63 89 84 93 93 77 99 87 78 62 87 90 95 2. Create a boxplot illustrating the differences between the 2 methods of language learning. (3) 3. Write a current APA-style Results section based on your analyses. All homework \"Results sections\" must follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in Current APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (4) Part 3: Cumulative Homework 1. The effects of a new faith-based anxiety treatment program are studied in a group of elderly patients with Generalized Anxiety Disorder (GAD). One of the outcome measures is the Geriatric Anxiety Inventory (GAI) (Pachana et al., 2007), a measure with possible scores from 0-20, with higher scores indicating higher anxiety. A large group of elderly patients completed the GAI before treatment. Fifteen patients with GAI scores of 10 or higher were chosen to participate in the study. The patients underwent the treatment program and completed the GAI at the end of treatment. The scores are listed below. Do the elderly patients exhibit lessened anxiety, as demonstrated by their GAI scores, after participating in the faith-based treatment program? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis. Follow the directions under the table on the next page. GAI Score Before Treatment 11 GAI Score After Treatment 7 Page 2 of 3 PSYC 355 12 17 13 10 13 16 11 11 15 18 11 11 14 16 11 12 14 9 10 12 11 12 13 17 8 13 9 12 a) Paste appropriate SPSS output. (5) b) Paste appropriate SPSS graph. (5) c) Write an APA-style Results section based on your analyses. All homework \"Results sections\" should follow the example given in the SPSS tutorials and the Course Content document \"Writing Results of Statistical Tests in APA Format\" (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (5) Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 2. Page 3 of 3