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Why a structured data framework?
Genogram work without structure produces gap-filled narratives: clients tell whatever comes to mind, counselors take notes ad hoc, and after two sessions key birth, marriage, and death dates are missing. The Three-Generation Data Framework is the minimum data base for any serious genogram analysis — and at the same time a safeguard against arbitrariness: when the same 8–10 categories are collected for each person, patterns (illness clusters, occupational transmissions, geographic mobility) become visible instead of remaining anecdotal.
With their standard reference work "Genograms: Assessment and Treatment" (4th ed. 2020, W. W. Norton), Monica McGoldrick and Randy Gerson established the international minimum standard: at least three generations — the index person plus parents plus grandparents; with a family focus, the children's generation as well. Murray Bowen, the intellectual forerunner of family therapy, provided the theoretical framework for this (the Multigenerational Transmission Process): relationship and symptom patterns are passed down across generations — without a multigenerational perspective, counseling misses the core.
Three generations — why exactly three? First, statistically: three generations span at least 70–100 years of family history and thus all the formative societal ruptures (wars, migrations, economic shocks) that still reverberate in families in the German-speaking countries (DACH) today. Second, systemically: transmission patterns become statistically visible only from the third generation onward — with two they are individual cases, with three they are repetitions. Third, clinically: Bowen, McGoldrick, and Schlippe/Schweitzer consistently document that symptom carriers are often the third or fourth generation of a "familial pendulum swing."
Contents: data catalog per person · McGoldrick symbol key · intake guide · anonymization for teaching · handling data gaps · data protection section · FAQ · print-instructions cover · fillable 3-generation sheet · customization checklist · sources.
The standard data catalog per person
For each person, eight mandatory categories + up to four optional categories are collected. More makes the genogram illegible; fewer leaves key patterns invisible.
Mandatory categories (always collect)
(1) First and last name (birth name where applicable for women)
(2) Date of birth (day/month/year; for older individuals the year suffices)
(3) Date of death + cause of death (if deceased)
(4) Occupation / education (highest completed)
(5) Serious illnesses (physical, psychological, addiction) — chronologically
(6) Relationship status with partner (marriage, divorce, separation — with date)
(7) Geographic place of residence (current + place of birth in a migration context)
(8) Source of the information ("who told it, how reliable is it?")
Optional categories (where relevant)
(9) Denomination / religious affiliation — where religion is significant within the system
(10) Ethnic origin / migration history — with a multicultural background
(11) Educational attainment + occupational success in relation to the family of origin
(12) Significant life events (trauma, flight, war, adoption)
Explanation. The mandatory categories cover the structural family map (who is connected to whom, when they died, what they were ill with). Optional categories are collected only when the matter at hand calls for them — data minimization (Art. 5(1)(c) GDPR) is both a professional-ethics and a legal obligation. Category 8 (source) is the underestimated key category: it distinguishes the client's remembered family reality from the "objective" history — and protects counselors from over-interpreting one-sided accounts.
Pitfalls
- Quietly expanding the catalog ("interesting, what did the grandparents vote?") — violates data minimization and overwhelms the client
- Incomplete mandatory categories ("we'll do that later") — remains undone in 70% of cases
- Omitting the source category — leads to genograms that look like "truth" even though they are only a landscape of memory
McGoldrick symbol key
The genogram speaks a standardized visual language that has been the same internationally since 1985. Knowing the symbols is the prerequisite for colleagues and clients to read the picture the same way.
Relationship quality (in lines between two persons):
Explanation. McGoldrick distinguishes structural lines (objective relationships such as marriage, parent-child) from quality lines (subjective assessment of the relationship). The latter are collected from the index person's perspective — other family members might see them differently. In the intake conversation, always ask: "How would you describe the relationship between X and Y?"
Intake guide for the session
A complete three-generation intake takes 60–90 minutes in the first iteration and 10–15 minutes per follow-up session for additions. A four-stage sequence has proven effective.
Stage 1 — Current constellation (15 min): Who currently lives with whom? Index person, partner, children, and any other household members. Addresses, occupations, ages. This is where the genogram is visually "anchored."
Stage 2 — Parent generation (20 min): Both parental lines separately. For each parent: siblings (including deceased ones, "those who were never born") + the parents' partnerships (including earlier ones) + remarriages. Structural lines first, then relationship quality.
Stage 3 — Grandparent generation (20 min): Four grandparent couples (maternal/paternal). Years of birth and death, occupation, migration history, illnesses. Tolerance for data gaps is high here — many clients know little about their grandparents; document honestly rather than guessing.
Stage 4 — Notable features and hypotheses (15–20 min): Which patterns stand out? Illness clusters (several cases of depression, several addictions, early deaths)? Occupational patterns (all the men tradesmen, all the women teachers)? Geographic movements? Relationship patterns (several divorces in one line)? Hypotheses, not diagnoses — phrase them as "interesting questions for the next session."
Intake pitfalls
- Starting directly with the grandparents — clients feel put on the spot as if taking a "quiz"
- Asking about relationship quality in stage 2/3 — overwhelms before the structure is complete
- Multiple sessions for one iteration — memory gaps fill in with fabrications between appointments
- Formulating your own hypotheses too early ("looks like Bowen triangulation") — shifts the conversation into the therapist's theory
Handling data gaps
Data gaps are the rule, not the exception. With grandparents from the pre-war era, with adoption involving unknown biological origin, with migration involving lost documents — the genogram remains fragmentary. What matters is not completeness but transparency.
Three strategies for gaps:
- Mark the gap explicitly (enter "?" in the form, note "maternal grandmother: no information available"). Never leave it blank — empty fields are later misread as "not collected."
- Document the source: from the client's own memory, from the mother's accounts, from a family Bible, from a registry-office inquiry. Different sources have different degrees of reliability.
- Methodological modesty: where there are structural ruptures (the Nazi era, flight from the GDR, adoption without an open file), the gap itself is a key piece of information — it points to a taboo or a rupture in the family system.
Anonymization for teaching purposes
Genograms from counseling practice are ideal teaching material — and at the same time a maximal data protection risk. Effective anonymization must dissolve all four identification levels:
Direct identifiers — replace names with initials or fictitious names, round dates of birth to the decade (1955 → "mid-1950s"), replace specific places with a region ("southern Germany," "eastern Germany").
Indirect identifiers — generalize rare occupational combinations ("Lord Mayor of Frankfurt" → "senior position in the municipal administration of a major city"), abstract spectacular family events ("son's murder in 2018" → "severe experience of violence in the family history"), generalize precise migration routes.
Structural identifiers — slightly adjust family size in rare constellations (identical quadruplets → triplets), spread out occupational clustering (all 6 children doctors → 3 medical professions).
Contextual identifiers — consider the venue and audience: in front of a regional specialist group, an anonymized case quickly becomes identifiable again through situational clues.
Data protection with the three-generation sheet
By definition, the sheet contains Article 9 data (health data, ethnic origin, religious belief, family relationships). The legal obligations are set out in detail in the template "GDPR Consent for Genogram Work." Here are the three critical special points for the intake sheet:
Third-party information — the client collects, from their own memory, data about parents, grandparents, and siblings. These persons cannot consent themselves. The sheet must note in writing that the data is used exclusively for the counseling and is not passed on to the persons named.
Storage location — a completed sheet is a sensitive counseling document. Keep it locally/encrypted, never as a photo in unencrypted cloud services (iCloud, Google Photos), never send it by unencrypted email.
Retention period — after the counseling ends, in accordance with the professional retention period (3 years for non-clinical counseling, 10 years for licensed medical treatment). At the client's request, deletion or handover beforehand — the sheet is part of the counseling documentation, but the right of access (Art. 15 GDPR) applies without restriction.
FAQ — Six key client questions
1. Do I have to remember everything? What if I have gaps?
Gaps are completely normal — for grandparents, most people know no more than the year of birth and occupation. We mark gaps as "?" and note where each piece of information comes from (own memory, mother, family Bible). Gaps are often revealing in themselves: what was not told usually has a reason.
2. What if I haven't asked family members and don't want to ask?
You don't have to ask anyone. The sheet is fed from your own memory. Inquiries within the family can be added later, voluntarily, but they are not a prerequisite. Sometimes the genogram work gives rise to the wish to ask a particular person — that is then a separate step.
3. What happens to the information about my family?
It stays in your counseling file and does not leave the counseling room. Family members learn nothing about what you have told, unless you expressly wish it. Even in anonymized case discussions (supervision), names are removed and identifying features are changed.
4. Why three generations — isn't one enough?
Familial patterns only become visible across several generations. If your mother and grandmother were both depressed, that is different information than if only one of them was. Three generations span about 80 years — enough to make historical ruptures (wars, expulsions) and their effects on the family visible.
5. Can I keep secrets to myself?
Of course. You decide what you tell. Some clients deliberately leave individual fields blank — that too is a statement. We respect this without further questions. You can also add to it later, once trust has grown — or not.
6. What if I am adopted and don't know my biological family?
In that case, we work with the "social" family (adoptive parents, adoptive grandparents) as the primary intake. The biological line is documented with whatever is known — even if that is little. With anonymous birth or closed adoption, the biological line remains a square/circle with a question mark — this is a central piece of your story, not an error in the sheet.
Notes on using the photocopy master
The following pages contain the printable Three-Generation Data Framework. You can detach the pages, fill them in, and use them together with your counselor or as preparation at home.
- One card per person is provided with the mandatory categories of name, date of birth/death, occupation, illnesses, and remarks.
- Three generations on one block each: grandparents · parents · index/siblings.
- Source reference per card — "own memory," "mother," "family Bible," etc. Leave gaps open; do not guess.
- Note fields for open questions and notable patterns for the next session.
- Before productive use: work through the customization checklist at the end of this template.
Client (index person): Date:
Grandparent generation (maternal)
Maternal grandmother
Maternal grandfather
Grandparent generation (paternal)
Paternal grandmother
Paternal grandfather
Parent generation
Mother
Father
Mother's sibling (1)
Mother's sibling (2)
Father's sibling (1)
Father's sibling (2)
Parents: relationship chronology
Relationship mother ↔ father
Earlier / additional partnerships (mother)
Earlier / additional partnerships (father)
Index generation (client + siblings)
Index person (client)
Sibling (1)
Sibling (2)
Sibling (3)
Current partner
Former partner
Children's generation (if any)
Child (1)
Child (2)
Child (3)
Open questions / hypotheses / notable patterns
Customization checklist before practical use
☐ Have the sheet ready as an A4 printout before the session (or digitally as a tablet template)
☐ Clarified with the client: the sheet is filled in together during the session
☐ GDPR consent signed BEFORE intake (template "dsgvo-einwilligung-muster")
☐ Source reference observed per card — "own memory", "mother", …
☐ Leave gaps open, do not guess
☐ Mark speculations explicitly ("probably")
☐ For an adoption/foster family: separate recording of biological / social
☐ For migration: include migration history as its own category
☐ Storage location: local/encrypted, never unencrypted cloud
☐ Date on every sheet — keep a version for follow-up sessions
☐ Anonymization routine prepared for supervision/teaching
☐ Sheet safely stored away at the end of the session (do not leave it lying in the waiting room)
Sources and further reading
- McGoldrick, M. / Gerson, R. / Petry, S. (2020): Genograms — Assessment and Treatment, 4th ed., W. W. Norton & Company. ISBN 978-0-393-71404-3. International standard; German translation in preparation.
- McGoldrick, M.: Genograms: Assessment and Intervention (earlier edition, freely accessible in the Internet Archive).
- Bowen, M. — The Bowen Center for the Study of the Family (thebowencenter.org) — Murray Bowen, Multigenerational Transmission Process; theoretical basis of the multigenerational perspective.
- Multicultural Family Institute (multiculturalfamily.org) — founded by McGoldrick; materials, workshops, example genograms.
- Schlippe, A. von / Schweitzer, J.: Lehrbuch der systemischen Therapie und Beratung I, Vandenhoeck & Ruprecht — the German-language (DACH) standard for genogram work.
- Springer — Encyclopedia of Couple and Family Therapy — overview articles on genogram methodology.
- GDPR Art. 5, 6, 7, 9 — legal basis for collecting special categories of data (see the separate template "dsgvo-einwilligung-muster").
- § 203 of the German Criminal Code (StGB) — duty of confidentiality; relevant for third-party genogram data.
For every clause concerning data processing: legal review before productive use. Methods change; the symbol key has been internationally stable since 2008 — as of 2026-06-03.