Research Methods

Research Methods

Overview of Research in Human Development

  • Scientific Method: A structured approach to answering questions through systematic observation and information gathering (Kuther, 2023, p. 28).

    • Basic Steps:

    1. Identify the research question and formulate hypotheses.

    2. Gather information.

    3. Summarize the information and evaluate the hypothesis.

    4. Interpret findings within the context of existing research and share results.

Central Concepts

Probability Density and Normal Distribution

  • Normal Distribution Characteristics:

    • Visualization illustrates distributions with various percentages reflecting standard deviations from the mean (c3).

    • Key markers include:

    • Mean (μ)

    • Standard deviations (σ)

    • Example: At μ - 4σ, only 0.13% of cases are present.

Hypothesis Formation

  • Hypothesis: A testable prediction derived from a theory; proposed explanation for a phenomenon (Berk, 2013, p. 41; Kuther, 2023, p. 674).

    • Example: "If students receive better teaching, then their exam scores will improve."

Measurement Reliability and Validity

Reliability

  • Definition: The consistency of a test's results over time.

    • Synonym: Consistency

Validity

  • Definition: The degree to which an instrument accurately measures what it intends to measure.

    • Synonym: Accuracy

    • Types:

    • Good vs. Poor Validity

      • Target A: Poor Validity, Good Reliability

      • Target C: Good Validity, Good Reliability

Generalizability

  • Definition: The applicability of results from a sample to a larger population.

    • Key Concepts:

    • Population: The complete set of items (individuals).

    • Sample: A subset of the population used for research.

Research Designs

Correlational Research Design

  • Definition: Examines relationships among measured characteristics, behaviors, and events (Kuther, 2023, p. 32).

  • Correlation Coefficient:

    • Magnitude: Ranges from 0 to 1.00; closer to 1 indicates stronger relationships.

    • Direction: Positive (+) vs. Negative (-) correlations.

Examples:

  1. Positive Correlation (+): Higher warmth corresponds with higher compliance in children.

  2. Negative Correlation (-): Increased restriction corresponds with decreased compliance in children.

Experimental Design

  • Components:

    • Independent Variable (manipulated)

    • Dependent Variable (outcome)

    • Groups:

    • Experimental Group: Receives the treatment.

    • Control Group: Similar conditions without treatment.

    • Random Assignment: Ensures equal chance of group placement.

Data Collection Methods

Types of Measures

  1. Observational Measures

    • Naturalistic: Real-world settings, behaviors as they occur.

    • Structured: Controlled environments, manipulating conditions.

  2. Self-Report Measures: Interviews, questionnaires.

  3. Physiological Measures: Techniques like EEG, MRI to assess biological data.

Advantages and Disadvantages

  • Observational Methods:

    • Advantage: Real-time data collection.

    • Disadvantage: Observer presence can influence behavior.

Designs for Studying Development

Cross-sectional Design

  • Definition: Compares different age groups at one time (Kuther, 2023, pp. 35, 671).

  • Advantages: Efficient, no issues with attrition.

  • Disadvantages: Cannot study individual development or cohort effects.

Longitudinal Design

  • Definition: Follows the same group over multiple points (Kuther, 2023, p. 36).

  • Advantages: Can assess developmental changes over time.

  • Disadvantages: Potential for biased sampling, selective attrition, and practice effects.

Ethics in Research with Children

Considerations

  • Protection from harm,

  • Risks vs. benefits,

  • Informed consent,

  • Privacy,

  • Debriefing.

Critical Thinking Skills

  • Ask Questions

  • Examine the Evidence

  • Avoid Emotional Reasoning

  • Consider Alternate Explanations

  • Tolerate Uncertainty

Conclusion: Seeking and Sharing Truth

  1. Align scholarship with gospel principles.

  2. Recognize that all truth, whether scientific or religious, can coexist peacefully.

  3. Foster a spirit of inquiry and reflection that nurtures faith and understanding.