PSYC1000 W25 Week 2_Posted

Principles of Scientific Research

  • Psychologists utilize research to explore cause-and-effect relationships.

  • Example research topics:

    • Nature of memory.

    • Brain function.

    • Emotional expression.

  • Types of Research:

    • Basic research: Seeks to answer theoretical questions.

    • Applied research: Aims to address real-world problems using theoretical insights.

Characteristics of Quality Scientific Research

  • Five Characteristics:

    • Based on objective, valid, and reliable measurements.

    • Findings should be generalizable.

    • Implementation of techniques that reduce bias.

    • Research must be made public.

    • Research must be replicable by others.

Objectivity vs. Subjectivity in Research

  • Objectivity:

    • Foundation of scientific methodology; involves objective measurements consistent across different observers.

  • Subjectivity:

    • Personal interpretations of events influenced by biases and prior experiences.

Scientific Measurement: Variables

  • Variables are fundamental in psychology research—any object, concept, or event being measured or manipulated.

  • Instruments like standardized surveys assist in measuring these variables.

Operational Definitions in Research

  • Operational Definitions specify procedures and measures used in observations.

  • Multiple operational definitions may exist for a single variable.

Reliability and Validity in Measurements

  • Reliability: Consistency of measurements.

    • Types of Reliability:

      • Test-retest reliability.

      • Interrater reliability.

  • Validity: Extent to which a measure accurately reflects the concept it aims to assess.

    • Essential for a measure to be valid, it must first be reliable.

Causation Between Variables

  • Research can explore relationships, e.g., debt stress and health issues.

  • Questions to consider:

    • Does debt stress cause health problems?

    • Do health problems lead to debt stress?

    • Is there an external variable influencing both?

Generalizability of Research Results

  • Important for findings to apply to real-world contexts outside the lab.

  • Random Sampling: Crucial for accurately reflecting the population.

Sources of Bias in Psychological Research

  • Objective research must minimize bias.

  • Types of Bias:

    • Researcher bias from those conducting measurements.

    • Participant bias from subjects being observed.

Techniques to Reduce Bias

  • Anonymity and confidentiality for participants can diminish bias.

  • Procedures:

    • Single-blind: Participants unaware of the study purpose or treatment type.

    • Double-blind: Both participants and experimenters are unaware of treatment specifics.

Characteristics of Poor Research

  • Five Characteristics:

    • Lack of falsifiable hypotheses.

    • Reliance on anecdotal evidence instead of solid data.

    • Selective data reporting.

  • Appeals to Authority and Common Sense:

    • Claims must be supported by data, not just ‘expert’ opinion or intuition.

Scientific Research Designs

  • Good research begins with a focused research question (e.g., factors affecting the color of the sky).

  • Hypothesis formulation includes operational definitions of the problem.

  • Testing hypotheses through appropriate research methods is necessary.

Types of Research Designs

  • Researchers select methods for testing hypotheses based on research goals:

    • Quantitative Research: Statistics-driven.

    • Qualitative Research: Interviews and participant insights.

    • Mixed Methods: Combination of both types.

Overview of Major Research Methods

  • Types of Research:

    • Experimental Research: Control and manipulation of variables.

    • Descriptive Research: Observations, surveys, case studies.

    • Correlational Research: Analyzing relationships between variables.

    • Biological Research: Studying neurological systems.

  • Goals:

    • Identify cause-and-effect relationships.

    • Describe and record behaviors.

    • Clarify variable relationships and predictions.

Ethics and Research Guidelines

  • Strict adherence to ethical standards for human participants:

    • Informed consent.

    • Voluntary participation.

    • Debriefing and confidentiality.

  • Oversight is provided by The Canadian Tri-Council Research Ethics Code.

Core Principles of the Canadian Tri-Council Research Ethics Code

  • Respect for human dignity and informed consent.

  • Protection of vulnerable persons.

  • Privacy, confidentiality, and justice.

  • Balancing potential harms with benefits of research.

Descriptive Statistics

  • Importance of descriptive statistics for interpreting research outcomes.

  • Key concepts include:

    • Frequencies

    • Distributions (Normal vs. Skewed)

    • Central Tendencies: Mean, median, mode.

    • Variability: Standard deviation and hypothesis testing.