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Data Preparation Process
The data preparation process is the critical step of transforming raw, unanalyzed data into an organized format ready for statistical analysis. This complex process involves coding and combining multiple variables—such as demographics, independent and dependent variables, and manipulation checks—for each participant. It also requires identifying and handling any missing, incorrect, or suspicious responses.
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Research Methods in Psychology - 4th American Edition @ KPU
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Data Preparation Process
Securing Raw Data
Checking Raw Data
Data File
What does the term 'raw data' refer to in the context of psychological research?
After a researcher has collected written observational notes and transcribed them into an organized, coded digital file, that newly coded file is still considered the study's raw data.
In psychological research, raw data takes various forms depending on the study's design. Match each research method with the specific item that serves as its raw data before any organization or analysis occurs.
A researcher is conducting an observational study on social interaction in a classroom. Arrange the following items in order, starting with the form that represents the most raw data and ending with the most processed form of information.
Which of the following is an example of 'raw data' in a psychological research study?
A researcher has just finished recording 20 hours of clinical interviews on digital video files. At this point, before any transcripts are made or specific behaviors are categorized, how should this information be classified?
In a formal critique of a psychology study's transparency, a reviewer discovers that the researcher only kept spreadsheets of organized scores and deleted the initial, uncleaned participant responses. The reviewer concludes that the researcher failed to preserve the _____ data, making it impossible to verify the accuracy of the coding and cleaning process.
In a study on cognitive aging, a computer program outputs a text file containing the exact millisecond timestamps of every keypress. If the researcher uses a script to remove outlier trials where participants took longer than 10 seconds, this filtered dataset is still considered the study's raw data.
Analyze the following research scenarios and match the state of the data with the description that represents its current form in the research workflow.
A researcher claims their study's data file is 'raw' because no inferential statistics have been run on it, even though they have already removed outliers and imputed missing values. When evaluating this claim, a methodologist would correct the researcher, pointing out that because cleaning has occurred, the dataset is no longer _____ data.
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The data preparation process involves several distinct tasks to transform raw participant responses into a format ready for analysis. Match each task to the scenario that best illustrates it.
Dr. Kim has collected raw data from 50 participants for a study on exercise and mood. In her spreadsheet, she notices that one participant reported exercising 200 hours per week (an impossible amount) and several others left the 'age' question blank. Which of the following actions should Dr. Kim take as part of the data preparation process?
A researcher has just finished collecting paper surveys measuring 'Need for Cognition.' Arrange the following steps of the data preparation process in the logical sequence they must be performed to transform the raw responses into a valid composite variable ready for statistical testing.
True or False: During the data preparation process, it is more scientifically sound to retain logically impossible responses (such as a participant reporting an age of years) to preserve the integrity of the 'raw' data than it is to exclude or adjust those responses before beginning statistical analysis.
You are the lead researcher for a study investigating 'Commuter Stress.' You have collected raw data in three formats: 1) GPS logs of travel duration in minutes, 2) heart-rate readings (BPM) from wearable sensors, and 3) categorical 'Mood Surveys' with responses ranging from 'Very Happy' to 'Very Stressed.'
Which of the following protocols represents the most effective way to create an integrated, analysis-ready dataset from these raw sources?
During the data preparation process, researchers focus exclusively on organizing the independent and dependent variables, while demographic data and manipulation checks are left unorganized until the statistical analysis phase.
Arrange the general stages of the data preparation process in the correct order, starting from the collection of raw responses and ending with the final dataset ready for statistical software.
In psychology research, the critical step of transforming raw, unanalyzed data into an organized format ready for statistical analysis—which includes coding variables, combining participant information, and identifying missing or suspicious responses—is known as _____.
A researcher is reviewing a raw dataset from a psychology study. Analyze each data situation below and match it to the specific data preparation challenge it represents.
A researcher preparing online survey data notices that one participant completed a 60-item questionnaire in 45 seconds—a task that normally takes 8–12 minutes. After weighing the evidence, she concludes that this participant's responses are _____, because the implausibly short completion time makes it virtually impossible that the participant read and genuinely considered each item, and including the data would threaten the validity of any subsequent statistical analysis.
Define the data preparation process and list the three main categories of participant variables that must be coded and combined, as well as the types of problematic responses that need to be identified and handled before statistical analysis.
Using your understanding of the data preparation process, explain what categories of variables the researcher must code and combine, and diagnose what types of problematic responses are present in this dataset.
Imagine you have collected raw survey sheets from a psychology experiment that measure age, gender, levels of stress, and a question testing if participants read the prompt. Write a brief response of one to three sentences describing the specific actions you would take to complete the data preparation process for this dataset.