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When the Psych Report Goes Against You — The Defense Playbook

TL;DR. A custody-evaluation report that lands against you is not the end of the case. Psych reports are evidence, not verdicts. They have methodology, sample bias, scope limits, and Daubert-style admissibility tests. A weak report can be challenged — and often must be — because in PA cases, the report's frame becomes the court's frame unless you push back. This is the 6-point defense.

Author: Alan Markson · Last reviewed: 2026-05-16 · License: CC BY 4.0 Originally published at antialienate.com/blog/psych-report-defense.

The 6 defense vectors

1. Methodology challenge

Did the evaluator: - Interview both parents? - Observe parent-child interaction in both homes? - Review collateral records (school, medical, prior court orders)? - Apply a structured PA-screening framework (Bernet's 5 criteria, Baker's 8 indicators)? - Document the alienating-behaviors assessment, not just the child's stated wishes?

Gaps in any of these are admissible-weight challenges.

2. Sample-bias challenge

Did the evaluator spend comparable time with both parents? Were collateral interviewees disproportionately from one side? Were the child's contact-pattern observations done in both households or just one?

3. Scope-creep challenge

Custody evaluators are not licensed to make PA diagnoses unless they have specific PA training. If the report includes "the child is not alienated" or "this is justified estrangement" without disclosure of PA-specific training, the conclusion exceeds the evaluator's scope.

4. Daubert / Mohan admissibility challenge

In US federal/most state courts (Daubert v. Merrell Dow, 1993) and Canadian courts (R. v. Mohan, 1994): - Is the method generally accepted in the field? - Is the method reliable + reproducible? - Has the evaluator disclosed error rates / known limitations?

If the report uses "PAS" (parental alienation syndrome) as a diagnostic frame, that frame fails Daubert. The current consensus is alienating behaviors (Harman/Kruk/Hines 2018) — a behavior-frame, not a syndrome-frame.

5. Second-opinion request

Motion for a court-appointed second evaluator with specific PA training — see posts/25-court-appointed-pa-expert.md. Frame the motion as procedural fairness, not as attacking the first evaluator.

6. Cross-examination preparation

If the report goes to trial: - Request all underlying notes, recordings, test protocols, scoring sheets - Identify factual errors in the report (names, dates, sequence) - Prepare 3-5 methodology gaps for cross - Have your lawyer cite Re C [2023] EWHC 345 + Bondavalli v. Italy (ECHR 2015) framing

What NOT to do

  • Don't email the evaluator complaining about the report — strengthens the alienator's "hostile parent" narrative
  • Don't try to disqualify the evaluator after the report — challenges before the report carry more weight
  • Don't ignore the report and hope for the best — silence is often read as acceptance
  • Don't dismiss the report's accurate parts — credibility is built on acknowledging valid criticisms

The court's view

Judges generally weight psych reports heavily until the report's methodology is structurally challenged. Most targeted parents lose because they fight the conclusion rather than the method. Win the method fight and the conclusion loses its weight.

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Citations

  • Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579 (1993)
  • R. v. Mohan, [1994] 2 S.C.R. 9
  • Re C (Parental Alienation; Instruction of Expert) [2023] EWHC 345 (Fam)
  • Bondavalli v. Italy, App. no. 35532/12, ECHR 2015
  • Harman, J. J., Kruk, E., & Hines, D. A. (2018). Psychological Bulletin, 144(12), 1275–1299.

Disclaimer

Educational content. Not legal or clinical advice.

CC BY 4.0 · antialienate.com · Alan Markson