Statistics in Psychology

Welcome to the world of statistics in psychology! While the study of statistics can be intimidating, it is an essential skill for any psychology professional. Statistics are all around you and are integral to the activities you will engage in throughout your career. Whether you venture into research, clinical practice, or another data-driven field, understanding statistics is crucial. In this course, you will learn about both descriptive and inferential statistics, which are fundamental tools in psychology. Whether youre aiming to become a therapist, researcher, sport psychologist, school psychologist, industrial-organizational psychologist, or any other professional where psychology plays a role, mastering these tools will help you make sense of data, uncover patterns, and make informed decisions that can significantly impact your work. Imagine youre working as a school psychologist, and you need to understand the academic performance of students in your school to provide the best support. You could use a graph to visually display your data and descriptive statistics to succinctly summarize your data. Measures of central tendency allow you to summarize test scores with measures like the mean, median, and mode, giving you a clear picture of overall performance. Standard deviation and variance help you understand the spread of scores, indicating how consistent the performance is across the student body. Standard scores can help you identify students who need extra support as well as those who are ahead of their peers. Statistics enable you to make informed decisions based on data. You might use them to assess an individual patient, evaluate your overall practices, or analyze trends in behavior. For instance, you may need to determine the impact of a specific treatment or evaluate the effectiveness of a new therapy. To get started, you are encouraged to download JASP early. This will allow you plenty of time to reach out to IT support if you have any challenges. JASP is an open-source (i.e., free) statistical software developed by the University of Amsterdam. You will be using JASP throughout this course to perform statistical analyses, construct graphs, and complete your assessments. Its a powerful tool that will help you gain practical experience with the statistical concepts youll be learning. In the first assessment, we will cover the basics of research design, including scales of measurement, reliability, validity, and experimental versus non-experimental design. Well also focus on descriptive statistics. Descriptive statistics include measures such as the mean, median, and mode, which help us identify central tendencies in our data. We will explore measures of variability, such as range, interquartile range, variance, and standard deviation, which provide insights into the spread and consistency of our data. Well also learn about skewness and kurtosis, which describe the shape of a distribution, and standard scores, which describe the location of a score in relation to all other scores. By mastering these concepts, you will be able to effectively summarize and interpret data, making it easier to identify patterns and trends. Overview Preparation Before you begin this assessment, complete the following: Download the Assessment 1 Worksheet [DOCX]. Obtain access to JASP Statistical Software. Download the GSS_30s.csv file. These data were extracted from the General Social Service (GSS). In this file, data were limited to individuals between the ages of 30 and 39 who completed the survey in 2022. Instructions Complete and submit the Assessment 1 worksheet. There are several questions that ask you to include a screenshot. This should be a screenshot taken directly from your computer. Photos taken with a phone or camera are not acceptable. How you will take a screenshot will depend on your operating system. For Mac Users On the keyboard, press Shift + Command () + 4. Your cursor will turn into a crosshair. Click and drag to select the area you want to capture. The screenshot will: Either be saved to your desktop (by default). Or be copied to your clipboard (if you also press Control key), which you can then paste directly into your assignment. For Windows Users Press Windows Key + Shift + S to open the Snipping Tool. Select the area you want to capture. The screenshot will be copied to your clipboard. You can then paste it into your assignment. If you’re unsure how to take a screenshot on your device, try searching online using the phrase: “How to take a screenshot on [your operating system]” (for example, “How to take a screenshot on Windows 11”). If you’re still having difficulty, reach out to Capella’s Technical Support. Competencies Measured By successfully completing this assessment, you will demonstrate your proficiency in the following course competencies and scoring guide criteria: Competency 3: Conduct statistical analyses to address research questions in the social sciences. Open a dataset in JASP. Select the correct variable types in JASP. Compute descriptive statistics for a variable in JASP. Compute descriptive statistics for a variable, with a split variable, in JASP. Competency 4: Determine the generalizability of specific findings based on parameters of the research design. Identify the population to which a studys results can be generalized. Determine whether a causal conclusion can be made from a given research studys design. Competency 5: Evaluate academic options and careers in the social sciences that use statistics. Identify a graduate program or job posting in the social sciences that uses statistics. Evaluate the statistical knowledge required for the selected graduate program or job. Competency 6: Explain why measurement of research variables must be reliable and valid. Explain how the measurement of a variable may impact the validity of the study. Competency 7: Explain the results of statistical analyses in common language. Write a sentence to report descriptive statistics that is consistent with APA standards.