2.4 Flashcards
Methodological Foundations in Psychological Research
Categories of Psychological Research: Psychological inquiry into behavior and underlying cognitive and biological processes relies on three primary research categories:
Descriptive Research: Qualitative or observational studies that describe general or specific behaviors and attributes observed and measured without testing specific relationships between variables or using hypothesis testing.
Correlational Research: Studies designed to formally test whether a non-causal relationship exists between two or more variables using hypothesis testing.
Experimental Research: Studies that test hypotheses to establish direct cause-and-effect relationships by randomly assigning participants to distinct experimental conditions and manipulating variables of interest under high control.
Role of Descriptive Research in Early Scientific Stages:
When exploring novel topics with little to no existing literature, forming a clear hypothesis is difficult.
Designing an experiment prematurely is counterproductive when the core scientific question is not yet clearly defined.
Non-experimental descriptive studies allow researchers to gather essential preliminary information and formulate concepts before designing targeted correlational or experimental studies.
Methodological Strengths and Weaknesses Comparison:
Observational Research: Yields rich, detailed behavioral data, but generalizability to the broader population is limited by small sample sizes.
Survey Research: Facilitates rapid data collection from large, diverse samples to enhance population generalizability, but limits response depth and is vulnerable to self-report biases.
Archival Research: Uses pre-existing records as an inexpensive data source, but researchers possess no control over how the original data was gathered or what variables were measured.
Experimental Research: Provides maximum control over variables to verify causation, but is frequently conducted in artificial settings (limiting real-world ecological validity) and is constrained by ethical boundaries.
Clinical and Case Studies
Definition and Core Characteristics:
A clinical or case study is an observational research strategy focusing on an intensive, in-depth description of a single individual or a small group of people based on careful observation.
Provides high descriptive richness and is a key tool for constructing theories, developing psychological concepts, and generating novel hypotheses.
Offers fine-grained knowledge that fully specifies complex causal mechanisms in ways that large-scale quantitative studies cannot replicate.
Historical and Theoretical Contributions:
Sigmund Freud built foundational psychoanalytic theories using case studies, including detailed accounts of patients such as Anna O., Little Hans, Dora, and the Wolf Man.
In his case study of the patient nicknamed "Rat Man," Freud asserted that the individual's severe neurosis was cured through psychoanalysis. The nickname stemmed from the patient's obsessions and nightmarish compulsions regarding rats.
Modern Clinical Case Studies:
Focus on an up-close, detailed examination of a client's complete background history and specific response to psychological treatment.
Aims to document therapeutic experiences to assist clinicians treating similar clinical profiles.
Can follow a single-case design or a multiple-case design, where systematic replication (rather than statistical sampling) serves as the inclusion criterion.
Advantages of Case Studies:
Serves as a source for developing novel hypotheses regarding the etiology of abnormal behavior for subsequent empirical testing.
Provides comprehensive records of rare or unusual conditions that occur too infrequently in the general population to evaluate using large sample sizes.
Limitations and Disadvantages of Case Studies:
Lack of Generalizability: Findings from an individual or small group cannot be inferred to apply to the broader population.
Researcher Bias: Subject to subjective writing and selection bias, where cases are chosen or interpreted specifically to fit the investigator's preconceived theoretical expectations.
Conflicting Interpretations: Resolving divergent or contradictory theoretical interpretations of the same historical case data is difficult.
Inability to Determine Causation: Cannot establish causal conclusions because variables are not manipulated or experimentally controlled.
Single-Case Experimental Designs
Rationale and Definition:
Developed to overcome control limitations inherent in traditional descriptive case studies by establishing a quantitative, statistical framework for evaluating treatment efficacy.
In a single-case experimental design (also termed single-participant research design), the exact same participant serves as their own subject in both the experimental and control conditions.
Clinical Application in Psychopharmacology:
Antipsychotic medications represent the primary treatment choice for managing schizophrenia and related psychotic disorders.
Major clinical trials apply single-case methodologies to evaluate differences between typical and atypical antipsychotics and assess their impacts on patient quality of life.
AB Design Mechanics:
A two-phase structure consisting of a baseline phase ("A") with no intervention, followed by a treatment phase ("B").
While behavioral changes during phase B suggest treatment efficacy, the simple AB design cannot rule out competing external hypotheses.
A-B-A-B Reversal Design Mechanics:
An experimental design where a person receives treatment (condition B) to compare against baseline (condition A), and this sequence is repeated to verify effectiveness.
Regarded as the most powerful single-subject experimental design due to its baseline-treatment reversal protocol:
Phase A (Initial Baseline): Target behaviors are systematically observed and recorded without intervention.
Phase B (Initial Treatment): The experimental intervention or clinical treatment is introduced.
Phase A (Reversal): Treatment is withdrawn, and behavior is observed to see if it returns to baseline levels.
Phase B (Reintroduction): Treatment is reapplied to verify if the therapeutic effect resumes.
Demonstrating that problem behaviors decrease during treatment phases and return to baseline during withdrawal gives researchers strong confidence in treatment efficacy.
Ethical Constraints in Reversal Designs:
Reversal is ethically unacceptable for harmful or self-injurious behaviors (e.g., self-harm or smoking).
It is unethical to end a research study on a baseline withdrawal phase if the treatment is highly beneficial, self-sustaining, or crucial for patient health.
Researchers hold an ethical duty to maximize benefits and ensure all participants maintain access to effective interventions upon study completion.
Key Historical Case Studies in Psychology
Phineas Gage (Harlow): Landmark case in neuroscience examining severe brain injury to the frontal lobe and subsequent personality transformation.
Anna O. (Breuer & Freud, 1895): Foundational case study in psychoanalysis examining hysteria and the development of the "talking cure."
Psychopathy and Multiple Personality Case Studies (Cleckley): Extensive case documentation on psychopathy published in The Mask of Sanity (1941) and multiple personality disorder in The Three Faces of Eve (1957).
Little Hans (Freud): Psychoanalytic investigation of phobias and psychosexual development in early childhood.
Rat Man (Freud): Psychoanalytic treatment of severe obsessive-compulsive neurosis centered on rat-related obsessions.
John/Joan Case (John Money): Longitudinal study evaluating gender identity assignment, surgical intervention, and psychosexual development.
Genie the Feral Child: Developmental study on critical periods for language acquisition following extreme social isolation and abuse.
Piaget's Developmental Studies: Observational case studies of children that established foundational theories of cognitive growth stages.
Murder of Kitty Genovese (Rosenthal): Analysis of bystander apathy and diffusion of responsibility in social psychology.
Washoe: In-depth language study demonstrating American Sign Language acquisition in a chimpanzee.
Patient H.M. (Henry Molaison): Neuropsychological case study revealing the role of the hippocampus in anterograde amnesia following bilateral medial temporal lobe resection.
Naturalistic Observation
Definition and Purpose:
The systematic observation and recording of behavior directly within its natural setting without researcher manipulation or artificial laboratory controls.
Provides maximal ecological validity (realism), ensuring that observed behaviors reflect real-world actions and enhancing generalizability.
Reactivity and the Demand for Inconspicuous Observation:
Individuals alter their behaviors when aware of being watched (e.g., self-report surveys on restroom handwashing yield near-universal affirmative responses, whereas covert observation demonstrates lower actual rates).
Observers must remain completely unobtrusive and inconspicuous (e.g., researchers posing as playground monitors to discreetly document child social anxiety or peer aggression).
Preschool Playground Study (Fanger, Frankel, & Hazen, 2012):
Investigated peer exclusion among preschool children on a playground at the University of Texas.
Unobtrusive Strategy: Researchers equipped select children with small wireless microphones (which the children quickly forgot about) and recorded observations from a distance.
Context Control: Children in this "laboratory preschool" were already accustomed to routine playground observers, minimizing observer reactivity.
Street and Urban Observational Settings:
Psychologists conduct field studies across streets, homes, restaurants, schools, train stations, and bus terminals.
Researchers have spent weeks covertly documenting the daily behaviors and routines of homeless individuals in public transportation hubs to minimize behavioral distortion.
Methodological Limitations of Naturalistic Observation:
Difficult to set up, standardise, and control, as researchers cannot manipulate environmental variables.
Contrast with Reality Television: Reality shows violate naturalistic principles because cast members are followed by explicit camera crews and recorded during personal confessionals, distorting natural behavior.
Participant Observation Methodology:
A distinct form of observational research where the researcher directly embeds themselves within a group to study its internal dynamics.
While participants usually know the researcher is studying them, some studies operate covertly.
Secretive Cult Study (Festinger, Riecken, & Schachter, 1956): To study a secretive doomsday cult that refused outside interviews, researchers pretended to be genuine cult members to gain internal access to their beliefs and psychological dynamics.
Controlling Observer Bias:
Observer Bias Definition: Occurs when observers involved in a study unconsciously skew their records to align with research expectations or hypotheses.
Operational Criteria: Researchers must establish explicit, objective criteria for defining and classifying target behaviors prior to data collection.
Inter-Rater Reliability: Assesses observational consistency by comparing independent records of the exact same event produced by multiple observers.
Survey Research
Definition and Delivery Formats:
A data-collection tool consisting of a structured list of questions answered by research participants.
Administered via paper-and-pencil questionnaires, electronic interfaces, or verbal interviews.
Sampling and Population Dynamics:
Population: The overall group of individuals that researchers are interested in studying and drawing inferences about.
Sample: A representative subset of individuals selected from the larger target population.
Survey Methodological Trade-offs vs. Case Studies:
Strengths: Allows rapid data collection from large, diverse samples, resulting in superior population generalizability.
Weaknesses: Provides significantly less detail per participant compared to case studies and is vulnerable to self-report errors, misremembering, direct lying, or social desirability bias (e.g., individuals underreporting personal alcohol consumption).
Empirical Study on Post-9/11 Discrimination (Jenkins, Ruppel, Kizer, Yehl, & Griffin, 2012):
Objective: Investigated persistent subtle prejudice against Arab-Americans nearly a decade after the terrorist attacks of September 11, 2001.
Sample & Design: 140 participants completed a 10-question survey evaluating explicit and implicit attitudes.
Direct vs. Indirect Measures: Included direct questions about overt prejudicial beliefs alongside indirect behavioral items (e.g., rating likelihood of introducing oneself to an Arab-American person in a social setting).
Findings: Participants overwhelmingly denied overt prejudicial attitudes across direct survey questions. However, indirect items revealed statistically significant reductions in willingness to engage in social interactions with Arab-Americans compared to other ethnic groups, demonstrating covert prejudice.
Key Definitions
A-B-A-B design: An experimental design in which a person is given treatment, or experimental condition (B), to compare against the baseline (A), and this repeats in order to determine effectiveness.
Clinical or case study: Observational research study focusing on one or a few people.
Correlational research: Tests whether a relationship exists between two or more variables.
Descriptive research: Research studies that do not test specific relationships between variables; they are used to describe general or specific behaviors and attributes that are observed and measured.
Experimental research: Tests a hypothesis to determine cause-and-effect relationships.
Generalizability: Inferring that the results for a sample apply to the larger population.
Inter-rater reliability: Measure of agreement among observers on how they record and classify a particular event.
Naturalistic observation: Observation of behavior in its natural setting.
Observer bias: When observations may be skewed to align with observer expectations.
Population: Overall group of individuals that the researchers are interested in.
Sample: Subset of individuals selected from the larger population.
Single-case experimental design: When the same research participant serves as the subject in both the experimental and control conditions.
Survey: List of questions to be answered by research participants—given as paper-and-pencil questionnaires, administered electronically, or conducted verbally—allowing researchers to collect data from a large number of people.