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Psychological Research Methodologies

Psychological research employs various methodologies, each suited to different questions, aims, and ethical considerations. Understanding the strengths, limitations, and applications of these methods is fundamental.

Experiments: Core Definition

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Experiment

A research method involving manipulation of an independent variable (IV) to observe its effect on a dependent variable (DV) while controlling other variables.
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Key Example

Lab experiments like Milgram’s obedience study.

Experiments: Validity Check

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StrengthsControl over variables allows determination of cause and effect (high internal validity).
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LimitationsArtificial conditions reduce ecological validity; ethical constraints may limit scope.

Quasi-Experiments Breakdown

Q

Quasi-Experiments

Similar to true experiments but lack random assignment to groups. The IV is naturally occurring or predetermined.
N

Natural Experiments

IV is an event or condition naturally occurring (e.g., natural disaster impact on stress).

Quasi-Experiments S/L

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StrengthsAllow study of variables that cannot be ethically manipulated.
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LimitationsRisks of confounding variables; lower internal validity.

Observation Methods Comparison

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Participant ObservationStrengths: Rich, in-depth understanding of behaviours within natural contexts. Limitations: Observer bias; researcher influence on participants.
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Non-Participant ObservationStrengths: Reduces observer effect as researcher remains unobtrusive. Limitations: Less insight into internal motivations or context.

Content Analysis

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Definition

A method to systematically analyse qualitative data such as texts, media, or transcripts by coding categories and quantifying their incidence.
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StrengthsCan analyse large volumes of data; objective coding schemes enhance reliability.
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LimitationsPotential for researcher bias in coding; loss of context.

Interview Structures

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Structured Interviews/QuestionnairesStrengths: Standardisation improves reliability and ease of data analysis. Limitations: Lack depth; can restrict responses.
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Semi-Structured InterviewsStrengths: Rich qualitative data allowing exploration of complex issues. Limitations: More difficult to analyse; interviewer bias potential.

Correlational Studies

Variables X & Y
Examine relationships between variables without manipulation. Strengths: Identify associations; useful when manipulation is impossible. Limitations: Cannot infer causation; third variable problem.

Case Studies Focus

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Intensive Examination: Intensive examination of an individual or group. Strengths: Detailed, descriptive data; useful for rare phenomena. Limitation: Low generalisability; potential subjectivity.

Self-Reports Reliability

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What are Self-Reports?
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Participants provide data about themselves, accessing internal states like attitudes and beliefs. Limitation: Social desirability bias; inaccurate reporting.

Quantitative vs Qualitative Data

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Quantitative DataNumerical, measurable outcomes often from experiments, structured questionnaires, or content analysis counts.
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Qualitative DataNon-numerical, descriptive data, often from observations, semi-structured interviews, or open-ended questions.

Research Strategy Tip

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Triangulation Power: Each methodology is selected based on research aims, ethical considerations, and practical constraints. Combined approaches (triangulation) can strengthen research by compensating for limitations of single methods.

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Psychological Research Methods Deck
Term
Experiment

What is an experiment in psychological research?

Answer
Definition

A method where the researcher manipulates an independent variable and observes its effect on a dependent variable while controlling other variables.

Term
Quasi-Experiment

What is a quasi-experiment?

Answer
Definition

A study similar to an experiment but without random assignment; the independent variable is naturally occurring or predetermined.

Term
Natural Experiment

How does a natural experiment differ from a quasi-experiment?

Answer
Difference

A natural experiment uses naturally occurring events as the independent variable, unlike controlled manipulation.

Term
Participant Observation

What is participant observation?

Answer
Definition

A method where the researcher actively engages with the group being studied to gain in-depth understanding.

Term
Non-Participant Observation

What is non-participant observation?

Answer
Definition

When the researcher observes a group without involvement or interaction.

Term
Content Analysis

What is content analysis?

Answer
Definition

A systematic method to analyze qualitative data by coding categories and quantifying their frequency.

Term
Structured Interviews

What are structured interviews?

Answer
Definition

Interviews with predetermined fixed questions and limited answer options.

Term
Semi-Structured Interviews

What are semi-structured interviews?

Answer
Definition

Interviews combining fixed questions and open opportunities to explore responses in depth.

Term
Correlational Studies

What do correlational studies investigate?

Answer
Definition

Relationships between variables without manipulation of any variable.

Term
Case Study

What defines a case study?

Answer
Definition

Intensive examination of an individual or group, often for rare phenomena.

Term
Self-Report

What is a self-report in psychological research?

Answer
Definition

Data provided directly by participants about their own attitudes, beliefs, or behaviors.

Term
Quantitative vs Qualitative Data

Difference between quantitative and qualitative data?

Answer
Difference

Quantitative data is numerical and measurable; qualitative data is descriptive and non-numerical.

Term
Triangulation

What is triangulation?

Answer
Definition

Combining multiple research methods to strengthen validity and compensate for limitations.

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📊 Psychology Research Methods Quiz

1. Which of the following methods involves manipulating an independent variable to observe its effect?

Experiments manipulate an independent variable to determine its causal effect on a dependent variable.

2. What is a limitation of quasi-experiments compared to true experiments?

Quasi-experiments lack random assignment, increasing the risk of confounding variables.

3. Which research method provides rich, in-depth understanding but risks observer bias?

Active involvement gives depth but introduces potential researcher bias.

4. Content analysis is primarily used to:

Content analysis organizes and quantifies textual or media data.

5. Why can’t correlational studies establish causality?

Without manipulation, causation cannot be confirmed, only associations.

📊 Results

  • Notes and Quiz
  • Psychology
  • AS & A Level
  • Mental Health
  • WJEC