Other Measures of Personality

Why Personality Assessment Matters for Your Future Practice

Picture yourself sitting across from a client who seems deeply anxious but insists they're "totally fine." Or imagine evaluating a job candidate who presents as confident and capable, but you notice inconsistencies in how they describe themselves. How do you get beneath the surface? How do you measure something as complex and multifaceted as personality?

This is where personality assessment tools become essential in your clinical toolkit. These measures help you understand patterns in how people think, feel, and behave—patterns they might not even recognize in themselves. For the EPPP, you'll need to know both the structured tests (where people answer specific questions) and projective tests (where people respond to ambiguous stimuli). Think of it this way: structured tests are like taking your vital signs at the doctor's office—standardized and objective. Projective tests are more like free-writing in therapy—revealing what emerges when the structure falls away.

Let's dive into the specific tests you need to master for the exam and your future practice.

Structured Personality Tests: The Multiple-Choice Approach to Understanding People

Structured personality tests work like dating apps: they ask specific questions and organize the responses into categories that help identify patterns. These tests use clear, objective items where people describe themselves through ratings, choices, or yes/no answers.

The 16 PF: Mapping the Full Spectrum of Traits

Raymond Cattell developed the Sixteen Personality Factor Questionnaire (16 PF) in 1947 using a clever strategy called the lexical approach. He reasoned that if a personality trait matters to humans, we would have created words for it. Think about how many words we have for describing hunger or tiredness—these concepts matter to survival, so language evolves to express them.

Cattell combed through the English dictionary, gathered every word that describes personality, then used factor analysis (a statistical technique that finds patterns in data) to organize thousands of descriptive words into a manageable system. His analysis revealed 16 primary traits like warmth, dominance, and sensitivity, which roll up into five broader global traits: extraversion, anxiety, tough-mindedness, independence, and self-control.

Imagine organizing your entire music library. Initially, you might have thousands of songs (like Cattell's personality words). Factor analysis would group them into specific genres—rock, jazz, classical (the 16 primary traits)—then into even broader categories like "energetic" versus "mellow" (the five global traits). The system helps you find patterns without losing important details.

Clinical Application: When assessing someone for workplace stress, the 16 PF can reveal specific traits (primary level) like "perfectionism" and "emotional sensitivity" that contribute to broader patterns (global level) of anxiety. This specificity helps target interventions.

The EPPS: Comparing Your Needs Against Each Other

The Edwards Personal Preference Schedule (EPPS), developed in 1959, takes a different approach based on Henry Murray's theory of human needs. It measures 15 basic psychological needs—achievement, affiliation, dominance, autonomy, and others that drive human behavior.

Here's what makes the EPPS unique: instead of asking "How much do you need achievement?" on a scale of 1-10, it presents pairs of statements matched for social desirability. For example:

• "I like to organize and lead group activities"
• "I prefer working independently on my own projects"

You must choose one from each pair. This forced-choice format creates what we call ipsative scores—they show the relative strength of your needs compared to your other needs, not compared to other people.

Think of it like your smartphone battery usage. When you check which apps consume the most power, you're seeing ipsative data: "Social media uses 40% of my battery, email uses 25%." This tells you about the relative distribution of your phone's resources, but it doesn't tell you if your total battery life is better or worse than someone else's phone. Similarly, the EPPS might show that achievement ranks higher than affiliation for you, but it can't tell you if your achievement need is higher than the average person's.

Important EPPP Distinction: Ipsative scores allow intra-individual comparisons (within one person) but not inter-individual comparisons (between people). This is a common test question!

The MBTI: Your Personality Type in Four Letters

The Myers-Briggs Type Indicator, created by Isabel Myers and Katharine Briggs based on Carl Jung's work, categorizes personality into 16 distinct types using four dimensions. Think of it as creating a personality shorthand—four letters that capture major patterns in how you interact with the world.

The four dimensions are:

Your result combines one preference from each dimension, creating types like ISTJ or ENFP. It's similar to how your food preferences might be described as "vegetarian, spicy, Asian fusion, comfort food"—each dimension adds a layer of understanding.

Real-World Context: The MBTI is enormously popular in corporate settings and career counseling, though it faces criticism in research circles for reliability issues. For the EPPP, know what it measures and how it works, but also be aware that many psychologists consider it more useful for self-reflection than clinical diagnosis.

The NEO-PI-3: The "Big Five" Personality Framework

The NEO Personality Inventory-3 measures what most contemporary personality researchers consider the fundamental dimensions of personality: the Big Five traits. Paul Costa and Robert McCrae identified these through a lexical approach similar to Cattell's, but their factor analysis converged on five core dimensions.

Use the acronym OCEAN or CANOE to remember them:

What makes the NEO-PI-3 particularly valuable is that each of the five broad traits breaks down into six or more specific facets. For instance, Conscientiousness includes facets like competence, order, dutifulness, achievement-striving, self-discipline, and deliberation. This is like knowing someone is "into fitness" (broad trait) versus knowing they specifically prefer weightlifting over cardio, train five days weekly, and follow a structured program (facets).

Clinical Significance: Research has linked specific patterns of the Big Five to mental health outcomes. A 2021 meta-analysis by Aschwanden and colleagues found that high neuroticism and low conscientiousness significantly predicted increased risk for Alzheimer's disease and other cognitive disorders in longitudinal studies. This connection between personality patterns and neurocognitive risk is important for the EPPP.

Imagine two people in their 60s: one highly neurotic (chronically stressed, anxious) and low in conscientiousness (poor health habits, inconsistent routines), versus someone emotionally stable who maintains structured health behaviors. Over decades, these personality patterns interact with biological factors, potentially affecting brain health. This illustrates how personality assessment serves preventive, not just diagnostic, purposes.

Projective Personality Tests: Reading Between the Lines

While structured tests are like surveys asking direct questions, projective tests are more like providing a blank canvas and seeing what someone paints. The underlying theory is that when stimuli are ambiguous and people have freedom to respond however they want, their inner psychological life—their conflicts, needs, and patterns—emerges in what they say.

Think of it like those "what do you see in the clouds" conversations. Ten people look at the same cloud formation, and one sees a dragon, another sees their grandmother's profile, and another sees nothing but shapeless vapor. These different perceptions reveal something about each person's inner world, not just the cloud itself.

The Rorschach Inkblot Test: More Than Just "What Do You See?"

Hermann Rorschach's 1921 test consists of 10 cards, each showing a symmetrical inkblot printed on white. The symmetry is intentional—it creates a sense of balance that can be comforting or unsettling depending on the viewer's psychological state.

Administration involves two phases:

Free Association Phase: The examiner shows each card and simply asks, "What might this be?" The examinee responds freely while the examiner records everything verbatim—not just what they see, but how long they take, their tone, their hesitations, any comments about the process itself.

Inquiry Phase: After all 10 cards, the examiner revisits each response and asks clarifying questions: "You said this looked like a butterfly—what about the inkblot made it look that way? Where did you see it?"

The most established scoring system is Exner's Comprehensive System, which codes responses across several dimensions:

Location: Did they use the whole inkblot, a common detail most people notice, or an unusual detail? Someone who only sees tiny, obscure details might be showing obsessive attention to minutiae or paranoid hypervigilance. Someone who consistently integrates the whole blot might demonstrate synthetic, big-picture thinking.

Determinants: What characteristics made them see what they saw?

• Form: The shape matched their response
• Movement: They saw something in motion (human movement suggests empathy and imagination; animal movement is more basic)
• Color: Color influenced their response (suggests emotional reactivity)
• Shading: Variations in light/dark mattered (may indicate anxiety or depression)

Think about watching a movie. Some people remember the plot (form), others the emotional moments that made them cry (color), others the subtle foreshadowing (unusual details), and others the overall themes (whole responses). What captures your attention reveals your psychological processing.

Content and Form Quality: Is it human, animal, or nature? How accurately does the response match the actual inkblot shape? Poor form quality might suggest impaired reality testing.

Popularity: Some responses are so common they're called "popular" responses. Giving zero popular responses might indicate very unconventional thinking or difficulty seeing things as others do—potentially relevant for certain disorders.

Clinical Interpretation Examples:

• Many color responses suggest you're emotionally reactive and possibly impulsive—like someone who makes decisions based on feelings in the moment
• Confabulation (seeing one small detail and over-generalizing it to the whole blot) may indicate brain injury, cognitive impairment, or schizophrenia—it's like seeing a single leaf and concluding you're in a rainforest
• All animal responses and no human responses might suggest difficulty with human relationships or empathy

The Thematic Apperception Test (TAT): Storytelling as Self-Revelation

Henry Murray's 1943 TAT takes a different approach to projective assessment. Instead of ambiguous inkblots, it uses 30 cards depicting realistic scenes with human figures—but the scenes are deliberately ambiguous about what's happening, what the relationships are, and what emotions are involved.

The examiner shows selected cards (not all 30 in most administrations) and asks the examinee to create a story for each that includes:

• What's happening in this moment
• What led up to this situation
• What the people are thinking and feeling
• How the story will end

Murray's scoring involves identifying:

The Hero: Which character does the examinee identify with? This often reveals self-concept.

Needs: What does the hero want or need? (achievement, affiliation, power, autonomy, etc.)

Press: What internal forces (feelings, thoughts) and external forces (other people, circumstances) drive the hero's behavior?

Outcomes: How do the stories end? Optimistically? Tragically? Ambiguously?

Imagine a card showing two people in conversation with serious expressions. One examinee creates a story about an employee finally standing up to a demanding boss, ending with mutual respect. Another examinee sees a relationship ending painfully with unresolved hurt. Same image, vastly different narratives—revealing different need systems, expectations, and emotional patterns.

Real-World Application: The TAT is particularly useful for understanding someone's implicit beliefs about relationships, authority, conflict, and achievement—themes that might not emerge in direct questioning. A client might say they want close relationships (in a structured test), but their TAT stories consistently show relationships ending badly. This discrepancy becomes therapeutically meaningful.

Common Misconceptions You Need to Avoid

Misconception 1: "The MBTI is scientifically rigorous and widely used in clinical settings"

Reality: While the MBTI is popular in business and personal development settings, it has significant reliability problems (people often get different types when retested) and limited research support. For the EPPP, know that it's based on Jung's types and measures four dimensions, but don't overestimate its clinical utility.

Misconception 2: "Projective tests are just about what you see"

Reality: With projective tests, how you respond matters as much as what you see. Hesitations, questions about the task, emotional reactions, the organization of your thoughts—all of this provides clinical data. The Rorschach doesn't reveal "unconscious truths" like magic; it samples your perceptual, cognitive, and emotional processing under ambiguous conditions.

Misconception 3: "Ipsative scores are just another type of percentile"

Reality: This is a crucial EPPP distinction. Ipsative scores (like those from the EPPS) rank needs within one person but don't compare to normative data. You can't say "This person's need for achievement is higher than 80% of people"—you can only say "Achievement is their strongest need relative to their other needs."

Misconception 4: "High neuroticism means someone has a disorder"

Reality: The Big Five traits are dimensional and exist on a spectrum. High neuroticism means greater emotional reactivity and tendency toward negative emotions, but it's a personality characteristic, not a diagnosis. However, extreme scores combined with other factors can indicate increased vulnerability to disorders.

Misconception 5: "All projective tests lack reliability and validity"

Reality: While projective tests have faced substantial criticism, comprehensive scoring systems like Exner's for the Rorschach have demonstrated acceptable reliability and validity when properly administered and scored. The key phrase is "properly administered"—these tests require extensive training.

Memory Strategies for EPPP Success

For the Big Five (NEO-PI-3), use spatial memory:

Picture yourself at the OCEAN beach. You're Open to new experiences (trying water sports), Conscientious about sunscreen (organized and careful), Extraverted by playing volleyball with strangers, Agreeable by sharing your snacks, and Not Neurotic by staying calm when a wave knocks you over.

For the MBTI dimensions, think of actual decisions:

When planning a weekend:

• I/E: Do I recharge alone (Introvert) or with friends (Extravert)?
• S/N: Do I plan concrete activities (Sensing) or stay open to whatever happens (Intuition)?
• T/F: Do I choose based on logistics and cost (Thinking) or what feels right emotionally (Feeling)?
• J/P: Do I schedule everything (Judging) or keep it flexible (Perceiving)?

For distinguishing tests, create a comparison chart:

For Rorschach scoring categories:

Use the acronym LDCFP:

• Location (where on the blot)
• Determinants (what characteristics—form, movement, color, shading)
• Content (human, animal, nature)
• Form quality (how accurately it matches)
• Popularity (how common the response is)

Picture yourself learning to dance carefully for people (the letters don't match perfectly, but the phrase helps trigger the categories).

For projective vs. structured:

Structured tests = Structured interview with specific questions

Projective tests = Projecting a movie (ambiguous content, you interpret it)

Real-World Clinical Practice: When to Use What

Scenario 1: Pre-employment Psychological Evaluation

A company requests evaluation for a management candidate. You'd likely use the NEO-PI-3 because:

• It has strong research support
• The Big Five traits predict job performance
• It provides normative data for comparisons
• Results are straightforward to communicate

You probably wouldn't use projective tests here because they're time-intensive, require extensive training to interpret, and their clinical purpose doesn't match the evaluation goal.

Scenario 2: Complex Trauma Assessment

A client with childhood trauma shows contradictory presentations—appearing functional but experiencing relationship difficulties and emotional dysregulation. Consider combining:

• NEO-PI-3 for understanding trait-level functioning (likely elevated neuroticism, possibly lower agreeableness due to trust issues)
• TAT to explore implicit beliefs about relationships, safety, and conflict that might not emerge in direct questioning

Scenario 3: Differential Diagnosis for Thought Disorder

When distinguishing between severe mood disorder with psychotic features versus schizophrenia spectrum disorder:

• Rorschach might reveal thought process abnormalities through confabulation, poor form quality, or bizarre content
• Look for patterns in perceptual accuracy and reality testing

Scenario 4: Career Counseling

Someone seeking career direction might benefit from:

• MBTI for general self-understanding (despite limitations, it provides a framework for discussing preferences)
• EPPS to understand the relative strength of needs like achievement, autonomy, and affiliation
• Results guide conversations about work environments matching their needs

Key Takeaways for EPPP Success

• Structured tests use objective, clear items; projective tests use ambiguous stimuli to reveal personality patterns

• The Big Five (OCEAN/CANOE) measured by NEO-PI-3 represent the most researched personality framework: Openness, Conscientiousness, Extraversion, Agreeableness, Neuroticism

• Ipsative scores (EPPS) allow within-person comparisons only, not between-person comparisons—this is a frequent test question

• The 16 PF uses both primary traits (16 specific) and global traits (5 broad) identified through lexical strategy and factor analysis

• MBTI provides 16 personality types from four dimensions (I/E, S/N, T/F, J/P) based on Jung's theory—popular but has reliability concerns

• Rorschach scoring (Exner's System) includes Location, Determinants, Content, Form Quality, and Popularity—each category reveals different psychological processes

• TAT reveals implicit needs, press (internal/external forces), and outcome expectations through storytelling

• Color responses on the Rorschach suggest emotional reactivity; confabulation may indicate cognitive impairment or psychosis

• High neuroticism and low conscientiousness are associated with increased risk for neurocognitive disorders in longitudinal research

• Know when each test is appropriate: structured tests for clear trait assessment and research-supported evaluation; projective tests for exploring implicit processes and complex clinical questions

Understanding these personality measures prepares you not just for exam questions, but for thoughtful assessment practices in your future clinical work. Each tool offers a different lens for understanding the complex humans who will seek your help.