Validity Scales Interpretation Flashcards

The FBS (Symptom Validity Scale, formerly 'Fake Bad Scale') was specifically developed to identify over-reporting in which population?

Answer: Personal injury litigants exaggerating somatic and cognitive symptoms

FBS was empirically developed to detect symptom exaggeration in personal injury litigants, particularly those over-reporting physical and cognitive complaints for secondary gain.

A client produces CNS (Cannot Say) raw score of 35. Which is the most appropriate clinical action?

Answer: Consider the protocol invalid and re-administer, encouraging item completion

CNS > 30 items is generally considered grounds for profile invalidity because omitted items systematically lower clinical scale scores; re-administration with encouragement to answer all items is recommended.

In forensic neuropsychological evaluations, convergent elevation on FBS, Fs, and RBS scales most strongly supports what conclusion?

Answer: Non-credible symptom reporting across somatic, physical, and cognitive domains

Multiple over-reporting indicators all elevated together create convergent evidence of non-credible symptom presentation that is difficult to explain by genuine pathology alone.

When interpreting validity scales, the concept of 'dual validity' means a clinician must rule out both:

Answer: Underreporting and overreporting before interpreting clinical scales

A complete validity analysis requires evaluating both directions of response distortion — defensiveness/underreporting AND exaggeration/overreporting — before clinical scales can be meaningfully interpreted.

A respondent with genuine PTSD might produce an elevated F scale primarily because:

Answer: Trauma symptoms include many experiences that are genuinely rare and unusual in the general population

Many PTSD symptoms (flashbacks, hypervigilance, dissociation) are genuinely rare in the normative population, causing authentic elevation on F without indicating feigning.

Which validity scale pattern is most indicative of an 'all-false' response set on the MMPI-2?

Answer: Elevated TRIN-False, suppressed F, elevated L

Systematic false responding produces a TRIN-False elevation; it also suppresses F (since many F items are true-keyed) and may elevate L (since denial of faults aligns with false responses to many L items).

A T-score cut-off of 100 or more on the F scale in a non-forensic clinical setting most strongly suggests:

Answer: Profile invalidity that likely precludes meaningful clinical interpretation

F ≥ 100T represents an extreme response pattern that, even in clinical settings, typically exceeds what genuine psychopathology produces and renders the profile uninterpretable.