# Personality Assessment

Psychology I · Individual Differences · https://tryals.app/learn/psychology-i/personality-assessment

## Objective Personality Tests

Personality assessment relies on two distinct families of tools. **Objective tests** are standardized self-report questionnaires with fixed response options, scored consistently and compared against normative data.

The **Minnesota Multiphasic Personality Inventory (MMPI)** is the most widely used example, originally developed to help diagnose psychological disorders. It includes built-in **validity scales** designed to detect faking good, faking bad, or inconsistent answers.

| Test Type | Example | Key Strength | Key Weakness |
| --- | --- | --- | --- |
| Objective | MMPI | Standardized scoring, norms, validity scales | Vulnerable to intentional distortion |

**Common pitfall:** Assuming self-reports are infallible. Even with validity scales, respondents can still distort their answers to present a specific image.

## Projective Tests & Comparison

**Projective tests** present ambiguous stimuli, assuming unconscious motives are "projected" onto them. The **Rorschach Inkblot Test** uses symmetric blots, and the **Thematic Apperception Test (TAT)** uses ambiguous scenes.

| Test Type | Example | Key Strength | Key Weakness |
| --- | --- | --- | --- |
| Projective | Rorschach, TAT | May reveal content beyond direct self-report | Lower reliability and validity |

Projective tests face criticism for lower **reliability** (inconsistent results across scorers) and lower **validity** (weaker evidence of predicting real outcomes) compared to objective tests.

**Common pitfall:** Assuming projective tests are entirely useless. They still see cautious clinical use as supplementary sources, despite weaker scientific metrics.

## Practice questions

6 of this lesson's 12 practice questions, with answers. The full set is in the app.

### 1. Sort each feature by the test family it describes.

**Answer:**

- Objective tests: Everyone answers the same items, and the total is read off a norm table, Built-in scales flag a respondent who is faking
- Projective tests: Ambiguous stimuli the respondent interprets freely, Its standing rests on a few indices rather than the whole instrument

**Why:** Standardized scoring and validity scales belong to objective tests; ambiguous stimuli, weaker reliability/validity, and the Rorschach/TAT belong to projective tests. Objective tests trade openness for measurement rigor.

Page: https://tryals.app/practice/psychology-i/personality-assessment/sort-each-feature-by-the-test-family-it-describes

### 2. Select every statement that is TRUE about personality assessment.

A. The MMPI is a widely used objective test.
B. The Rorschach and TAT are projective tests.
C. Projective tests generally have higher reliability than objective tests.
D. Projective tests use ambiguous stimuli.
E. Validity scales help detect faking on objective tests.

**Answer:** A. The MMPI is a widely used objective test.; B. The Rorschach and TAT are projective tests.; D. Projective tests use ambiguous stimuli.; E. Validity scales help detect faking on objective tests.

**Why:** The MMPI, projective ambiguous stimuli, validity scales, and the Rorschach/TAT are all true. Projective tests have LOWER, not higher, reliability than objective tests - the one false option.

Page: https://tryals.app/practice/psychology-i/personality-assessment/select-every-statement-that-is-true-about-personality-assessment

### 3. Projective tests remain in use because their reliability and validity are well established.

**Answer:** False

**Why:** False. Their psychometric properties are weak; the argument made for them is that an ambiguous stimulus is harder to fake than a self-report item that announces what it measures. The rebuttal is that whatever survives faking is not measuring much either.

Page: https://tryals.app/practice/psychology-i/personality-assessment/projective-tests-remain-in-use-because-their-reliability-and-validity

### 4. People shown a personality profile of vague, broadly flattering statements rate it as *strikingly accurate* about themselves, even when everyone receives the identical text. What does the **Barnum effect** imply for assessment?

A. That people are poor judges of their own personality and need expert assessment
B. That vague statements are more accurate than specific ones
C. That personality assessment is impossible, since any feedback will be accepted
D. That felt accuracy is worthless as evidence a test works

**Answer:** D. That felt accuracy is worthless as evidence a test works

**Why:** Agreement measures the reader, not the instrument, the identical text convinces everyone, so recognition cannot certify a test. It is why horoscopes and some commercial personality products feel uncanny, and why validity is demonstrated by predicting something rather than by satisfied customers.

Page: https://tryals.app/practice/psychology-i/personality-assessment/people-shown-a-personality-profile-of-vague-broadly-flattering

### 5. The Rorschach's inter-rater reliability was poor for decades, then improved substantially once Exner introduced a standardised scoring system. Why does that improvement not by itself rescue the test's validity?

A. Because Exner's system was later withdrawn, so the improvement no longer applies.
B. Because inter-rater reliability is irrelevant to projective tests, which depend on clinical intuition.
C. Because validity is established by expert consensus, which the Rorschach has always had.
D. Because reliability is necessary for validity and does not supply it.

**Answer:** D. Because reliability is necessary for validity and does not supply it.

**Why:** Exner fixed a real problem, before it, two clinicians could score one protocol quite differently, which capped how valid any interpretation could be. Removing a cap is not the same as demonstrating meaning: it is the bathroom scale again, agreement with each other against correspondence with the person. The validity picture must be taken interpretation by interpretation.

Page: https://tryals.app/practice/psychology-i/personality-assessment/the-rorschachs-inter-rater-reliability-was-poor-for-decades-then

### 6. The MMPI includes validity scales designed to detect faking; the Rorschach has no such thing. Why does that difference follow from the kind of test each one is, rather than being an oversight?

A. Because the Rorschach's authors considered validity scales unnecessary given its clinical sophistication.
B. Because validity scales measure the test's validity rather than the respondent's honesty, and projective validity is assessed differently.
C. Because projective tests cannot be faked, so a validity scale would have nothing to detect.
D. Because a validity scale needs items with fixed response options.

**Answer:** D. Because a validity scale needs items with fixed response options.

**Why:** Validity scales are a statistical device that depends on fixed items, the MMPI's L, F and K work by spotting response patterns rare in honest respondents, which is computable only when everyone answered the same items. A free-form inkblot description has no norm to check against, so the absence is structural rather than an oversight.

Page: https://tryals.app/practice/psychology-i/personality-assessment/the-mmpi-includes-validity-scales-designed-to-detect-faking-the