Clinical Assessment, Diagnosis, and Research in Psychopathology

Clinical Assessment: Purpose and Overview

  • Purpose of clinical assessment
    • Understand the individual person
    • Predict their behavior
    • Inform treatment plans
    • Evaluate treatment outcomes
  • Conceptual model
    • Assessment as a funnel: start broad, narrow as information is gathered
    • Use a multi-dimensional approach (refer to previous chapter)
  • Core psychometrics in assessment
    • Standardization
    • Reliability of assessments
    • Validity of assessments
  • Core starting point
    • Begin with the clinical interview to determine psychopathology
    • Mental Status Exam (MSE) is one of the most common assessments used during the interview
  • Exam focus for exam prep
    • Remember the five areas included in the Mental Status Exam

Mental Status Exam: Five Areas and Components

  • Five key areas to assess during the clinical interview (structured, semi-structured, or unstructured)
    • Appearance and behavior
    • Attire, expressions, posture, overall presentation
    • Thought processes
    • How they talk and the content of speech; pace, coherence, and logical flow
    • Mood and affect
    • Mood: what the person reports feeling; affect: observed emotional tone and appropriateness
    • Intellectual functioning
    • Use of metaphors, level of abstraction, vocabulary, and problem-solving ability
    • Sensorium (orientation)
    • Awareness of surroundings; orientation to self, time, and place (times three)
  • Practical notes
    • The exam can take ~30 minutes or longer depending on the case
    • Frank case study illustrates how to observe and document each component
  • Case study observations (Frank)
    • Appearance: attire, expressions, posture
    • Thought process: speech rate, content, coherence
    • Mood and affect: anxiety, appropriateness
    • Intellectual functioning: metaphors, abstractions, vocabulary
    • Sensorium: orientation to self, time, place
  • Behavioral assessment and the here-and-now
    • Focus on current functioning and direct observations in the environment
  • ABCs of observation
    • Antecedents: what triggers the problematic behavior
    • Behaviors: the observable problematic behavior
    • Consequences: what follows the behavior (reinforcement, punishment, etc.)
  • Purpose of ABCs
    • Identify problematic behaviors and their triggers and outcomes

Psychological Testing: Reliability, Validity, and Test Types

  • Reliability and validity are essential
    • Tests must be reliable (consistently measure) and valid (measure what they are intended to measure)
    • If used to formulate diagnosis/treatment, information must be valid
  • Projective tests (psychodynamic/psychoanalytic tradition)
    • Examples: Rorschach Inkblot Test; Thematic Apperception Test (TAT)
    • Mechanism: client projects personality aspects onto ambiguous stimuli; relies on clinician inference
    • Issues: low reliability and validity on many scales; interpretations rely on inference
    • State of Texas note: licensed professional counselors are forbidden to use projective tests due to reliability/validity concerns (state-specific; may differ elsewhere)
  • Objective tests (empirical tradition)
    • Characteristics: stimuli are less ambiguous; require minimal clinical inference
    • Examples: MMPI (Minnesota Multiphasic Personality Inventory); IQ tests
    • Strengths: lengthy, reliable, higher validity for clinical use
  • Neuropsychological testing
    • Purpose: assess a broad range of cognitive and behavioral functions to understand brain–behavior relations
    • Limitations: false positives (identifying a problem where none exists) and false negatives (failing to detect a present problem)
  • Neuroimaging
    • Purpose: picture brain structure and function to understand brain–behavior relationships
    • Modalities: CT/CAT scan, MRI, PET (positron emission tomography), SPECT (single-photon emission computed tomography), fMRI (functional MRI)
    • PET and SPECT: involve injections of radioactive isotopes; isotopes interact with oxygen in blood and glucose in the brain
    • fMRI: measures changes in brain activity over time (functional changes)
  • Psychophysiological assessments
    • Assess the nervous system’s structure, function, and activity
    • Example: EEG (electroencephalography) – measures brainwave activity
  • Summary for testing considerations
    • Different tests serve different purposes and have varying levels of reliability/validity
    • Choice of test should align with assessment goals and ethical/legal considerations

Research in Psychopathology: Types, Designs, and Concepts

  • Big questions driving psychopathology research
    • What problems cause distress or impairment in functioning?
    • Why do people behave in unusual ways, and how can behavior be made more adaptive?
  • Two main research camps in psychology
    • Qualitative research
    • Quantitative research
    • Note: qualitative work can progress toward quantitative analyses
  • Experimental vs. descriptive research (within the quantitative/qualitative framework)
    • Experimental research (quantitative)
    • Purpose: determine cause-and-effect relationships (causality)
    • Key components:
      • Manipulate an independent variable (IV)
      • Create at least two groups: experimental and control/placebo
      • Random assignment of participants to groups
      • Measure a dependent variable (DV) after manipulation
      • Control for confounding/extraneous variables
    • Notation concepts
      • Independent variable (IV): the condition that is deliberately altered by the experimenter
      • Dependent variable (DV): the outcome measured to assess the effect of the IV
      • Placebo: inert treatment given to the control group
      • Randomization: equal chance of assignment to groups
    • Descriptive research (qualitative methods)
    • Describes behavior without establishing causality
    • Methods include observations, lab observations, case studies, surveys, and correlational studies
  • Correlational research details
    • Purpose: examine relationships between variables without inferring causation
    • Relationship type: correlation coefficient r∈[−1,1]r \in [-1, 1]
    • Strength and direction
    • The closer |r| is to 1, the stronger the relationship
    • Positive correlation: both variables move in the same direction
      • As one increases, the other tends to increase
    • Negative correlation: variables move in opposite directions
      • As one increases, the other tends to decrease
    • Examples and interpretation
    • Example question: Is there a relationship between life stress scores and depression scores?
      • Collect life stress scores and depression scores, then assess the correlation between them
    • Important caveat: correlation does not imply causation
  • Descriptive design examples
    • Case studies (e.g., the classic Gene Quad case study)
    • Involve extensive observation and description of a specific client or group
    • Strength: rich, detailed data
    • Limitations: lack of scientific rigor, weak internal validity, potential confounds
    • Longitudinal design
    • Follows the same individuals over an extended period
    • Cross-sectional design
    • Looks at individuals of different ages at a single point in time
    • Cross-sequential design (also mentioned as a combination of longitudinal and cross-sectional)
    • Follows groups over time while including different age cohorts
  • Case examples and implications
    • Stress and depression relationship (illustrative correlational example)
    • Sleep problems and age (illustrative positive correlation)
  • Final notes on research approaches
    • Ethical considerations can restrict certain experimental manipulations
    • Epidemiological research often employs correlational methods to estimate incidence and prevalence
  • Takeaways for exam readiness
    • Understand the differences between experimental and descriptive methods
    • Be able to explain IV, DV, randomization, placebo, and confounds
    • Understand what correlation means, how to interpret r, and why correlation does not imply causation
    • Recognize the strengths and limitations of case studies and longitudinal/cross-sectional/cross-sequential designs

Practical and Ethical Considerations Across Assessment and Research

  • Ethical and practical implications
    • Use of tests with adequate reliability/validity to avoid misdiagnosis or ineffective treatment
    • Legal/state-specific restrictions on certain testing approaches (e.g., projective tests in Texas) that affect clinical practice
  • Integration with real-world practice
    • Clinical interview, mental status examination, and behavioral observations inform diagnosis and treatment planning
    • Psychological testing and neuroimaging contribute to a comprehensive understanding but must be interpreted within their limitations
    • Research methods guide evidence-based practice and help explain mechanisms of psychopathology while acknowledging causality limits