Psychology Research Methods Flashcards
Goals of Science and Evaluation of Scientific Claims
Scientific claims presented in public media are often hyped up or framed selectively to capture attention.
Critical evaluation of scientific claims requires examining the underlying studies conducted and the specific empirical evidence supporting them.
Psychology utilizes the scientific method to collect empirical data, conduct research, and validate claims.
The four primary goals of science are:
Describing what happens.
Predicting when it happens.
Controlling what causes it to happen.
Explaining why it happens.
While scientific literature often focuses heavily on describing, predicting, and explaining, controlling variables remains an essential aspect of the scientific process.
Scientific Method Demonstration: Mind Reading and Hypothesis Testing
A common misconception about psychologists is that they possess the ability to read minds.
To illustrate the scientific method, hypothesis formulation, and data collection, a demonstration was conducted using student-written index cards.
Demonstration Sequence:
Round 1 Statement: "I would rather be loud than quiet."
Student Author: Marley (received credit for card selection).
Round 2 Statement: "I like beer, yummy beer."
Independent Verification: Student Ruby inspected two cards directly to test accuracy.
Result: Ruby confirmed one statement was correct and one statement was incorrect.
Round 3 Statement: "I really like cats."
Student Author: Caitlin T.
Alternative Hypotheses & General Statements:
Hypothesis A (General Statements): The claim of mind reading might actually be the generation of broad, universally applicable statements that multiple people write down.
Shane A. proposed the general statement: "I'm hungry."
Self-Report Method Caveat: Relying on self-report data introduces the risk that participants may not report truthfully.
Round 4 Prediction:
Incorrect Prediction: Statement predicted as "My favorite color is red" / "Chapter two was very revise", whereas actual statement on card was "I really, really love chapter two. It's very exciting."
Result: Repeated data collection disproved the mind-reading hypothesis.
Mechanics of the Demonstration (The One-Card-Ahead Method):
Student Andrew identified the actual mechanism explaining the observations.
The method involved remaining exactly one card ahead in the sequence:
Before announcing the statement for a card, the previous card's visual content was read silently.
The speaker recited the text of the next card while holding the current card, maintaining an offset sequence starting from Marley's initial card.
Scientific Method Takeaways:
Hypotheses isolate specific variables explaining an observed phenomenon.
Studies require designing methods to measure isolated variables and control for alternative explanations (e.g., controlling room lighting to prevent seeing through index cards).
Repeated data collection across large sample sizes ensures findings can be replicated under identical prediction conditions.
Theories, Hypotheses, and Operational Definitions
Theory:
Defined as an interconnected set of ideas or concepts used to explain a specific problem, phenomenon, or question.
Functions to explain prior observations or existing datasets and generate predictions about future events.
Falsifiability: An essential criterion of a valid scientific theory is that it must be falsifiable—meaning it must be structured such that empirical data could potentially refute or disprove it. Theories lacking falsifiability are difficult to scientifically support.
Theory Support Cycle: When a theory repeatedly makes accurate predictions confirmed by data, support for the theory increases. If data fails to support predictions, the theory must be revised or rejected.
Hypothesis:
Defined as a specific, testable prediction derived directly from a theory.
Substantially narrower and more specific than broad theories.
Requires controlling for alternative explanations and confounding variables.
Requires adequate sample sizes and replication to demonstrate consistent results under equivalent conditions.
Operational Definition:
Defined as the exact specification of how a variable is measured or manipulated within a study.
Translates abstract conceptual ideas into concrete, quantifiable procedures.
Example — Student Happiness Research:
Conceptual Variable: Student happiness.
Operational Definition 1: Self-report rating scales.
Operational Definition 2: Nonverbal behavior measurements, such as counting the number of smiles per minute ().
Research Designs in Psychology
Sequential Progression in Research:
Formulate a broad theory (e.g., "Alcohol consumption facilitates social interactions").
Develop a specific hypothesis (e.g., "Individuals will display higher rates of social behavior when alcoholic beverages are present").
Select a research design to collect empirical data.
Experimental Design:
Goal: Demonstrate a direct cause-and-effect relationship between two or more variables.
Method: Strictly controls for extraneous variables and alternative explanations through study design.
Significance: The experimental design is the only research method capable of establishing definitive cause-and-effect relationships.
Descriptive Research:
Focuses on observing, describing, and documenting behaviors or phenomena as they naturally occur without variable manipulation.
Naturalistic Observation:
Involves observing subjects in their natural environments without intervention.
Application: Used when experimental manipulation would be unethical (e.g., artificially inducing academic detriments or exposure to harmful conditions).
Example Observation: Observing a young child naturally gravitating toward specific toy types, such as tractors, construction equipment, and transformers.
Limitations: Subject to reactivity—the phenomenon where participants alter their natural behavior because they are aware of being observed.
Participant Observation:
Involves the researcher actively participating in the group or situation being studied to gain an internal perspective.
Theoretical Rationale: Full understanding of a specific perspective requires direct, physical experience rather than third-person observation.
Examples: Media and sociological demonstrations, such as Tyra Banks wearing a suit to directly observe and compare societal treatment based on body size.
Limitations: Susceptible to a loss of researcher objectivity due to personal immersion in the environment.
Case Study:
An intensive, detailed investigation of a single individual, a small group of people, or a specific case.
Used to directly analyze rare, complex, or unique psychological conditions and circumstances.
Correlational Study:
Measures the strength and direction of a relationship between two or more naturally occurring variables without direct manipulation.
Fundamental Rule: Correlation does not equal causation. Correlational studies cannot establish that variable caused variable , only that a systematic relationship or association exists between them.
Identification: Research descriptions typically state that the researcher "measured variable and measured variable ".
Example: Surveying participants to rate the physical attractiveness of celebrities (e.g., Zendaya or Jason Momoa) on a numerical Likert scale ranging from to , followed by statistical analysis of score relationships.
Classroom Dialogue and Discussions
Student Demonstration Participants:
Marley: Card author ("I would rather be loud than quiet").
Ruby: Verified index cards during the mind-reading demonstration (confirmed 1 correct, 1 incorrect).
Caitlin T.: Card author ("I really like cats").
Shane A.: Proposed "I'm hungry" as a common general response.
Andrew: Correctly deduced the "one card ahead" operational mechanism behind the demonstration.
Student Logistics and Side Conversations:
Mail room logistics: Discussion regarding checking Amazon delivery maps and visiting the mail room.
Mail room operational hours: Closes at .