Data Collection in Quantitative Research

Data Collection in Quantitative Research

  • Self Report Data

    • Definition: Also known as patient-reported outcomes in medical literature; it involves data in which researchers know in advance what information is needed.

    • Tool Used: Research instruments, typically in written form.

    • Types of Techniques:

    • Interview Schedule: Used when participants cannot read/write.

    • Questionnaire: Formal document listing questions where participants provide written answers.

    • Association: Respondents provide responses directly based on the tool provided.

  • Types of Questions in Self Report Data

    • Open-Ended Questions: Allow participants to respond in their own words (e.g., "Why did you stop smoking?").

    • Closed-Ended Questions: Participants select responses from pre-specified options. Common in surveys due to ease of analysis.

    • Examples of Closed-Ended Questions:

    • Dichotomous: e.g., "Have you ever been pregnant?" (Yes/No)

    • Multiple Choice: e.g., "How important is it to you to avoid pregnancy at this time?" (Various graded options)

    • Forced Choice: e.g., "Which statement most closely represents your point of view?"

    • Rating Questions: e.g., "Rate your satisfaction with nursing care from 0 (extremely dissatisfied) to 10 (extremely satisfied)."

  • Summated Rating Scale

    • Definition: Measures attitudes, perceptions, psychological traits; estimates rather than accurately measures traits.

    • Likert Scale: Commonly used in nursing research; consists of declarative statements allowing participants to express agreement/disagreement.

    • Scoring: Carefully utilize positive/negative statements with reversal in scoring for negatively worded items to maintain consistency in analysis.

    • Analysis: Sum total scores from responses to differentiate opinions among participants.

  • Observational Data

    • Definition: Gathering data through structured observations of behavior.

    • Importance: Useful when self reports might be insufficient or biased, capturing behaviors not verbally expressed.

    • Methods: Instrument protocols are used to document specific behaviors, categorized through a category system.

    • Types of Observational Methods:

    • Structured Observation: Focuses on specific behaviors.

    • Participant Observation: Broader context of behaviors related to participants’ life experiences.

    • Category System: Organizes observations into exhaustive (all behaviors) or nonexhaustive (specific behaviors) systems to facilitate data collection.

  • ### Biomarkers

    • Definition: Biophysiological markers used in clinical studies to understand physiological processes.

    • Types:

    • In Vivo: Measurements taken directly from living organisms (e.g., temperature).

    • In Vitro: Measurements from biological materials extracted for laboratory analysis (e.g., blood glucose).

Overall, quantitative data collection methods involve diverse approaches to gathering self report data, observational data, and biomarkers.