Read a record as a claim with a creator, purpose and scope. A count, interpretation and value judgment are different kinds of evidence. Percent means per hundred; percentage points compare two percentages.
context
The relationships and circumstances that shape an observation's meaning
teaching record
An authored fictional example designed to make reasoning inspectable; not evidence that an event occurred.
01 · TRY
Which find has stronger contextual evidence here?
Build two hypotheses for each assemblage and list distinguishing evidence. Mark conclusions weakened by disturbance.
Use the supplied records to complete this task: Build two hypotheses for each assemblage and list distinguishing evidence. Mark conclusions weakened by disturbance. Explain your reasoning in a short paragraph or an annotated diagram with a text equivalent.
Make a provisional claim
Loading saved evidence…
Inspect evidence and test an explanation
The investigation controls appear when your local evidence is ready.
04 · UNDERSTAND
Connect evidence and mechanism
Artifacts need context and alternative explanations
Archaeology interprets material traces through provenience, association, dating and formation processes. An artifact’s location and surrounding evidence constrain interpretation. Similar objects can serve different purposes, and later disturbance can mix layers.
Inspect the case
Teaching excavation record: cooking vessels and charred seeds occur in one intact layer near a hearth.
Teaching second record: a decorated vessel comes from disturbed soil with objects of several dates. Its original location is unknown.
These first two context records are original fictional teaching materials, not historical primary sources. The separate published-assemblage comparison later on this page uses observed NPS ceramic data; its source and limitations are supplied with the activity.
Work through the mechanism
The intact assemblage supports a food-preparation hypothesis more strongly than the isolated decorated object supports a ritual claim. Decoration alone does not identify function.
Your investigation
Build two hypotheses for each assemblage and list distinguishing evidence. Mark conclusions weakened by disturbance.
Make a two-column evidence table: what the record directly supports, and what you infer. Use record IDs when connecting observations to claims. Preserve your first interpretation before revising it.
Practice and transfer
Which find has stronger contextual evidence here?
Try the practice check in the activity, explain your choice, then apply the idea to this unfamiliar case: A later trench cuts through an older layer. What must be considered?
Limits and responsible interpretation
Do not collect or disturb actual sites. Heritage permissions, community authority and legal restrictions matter. The hearth and disturbed-vessel records in the opening exercise are fictional; the later NPS comparison uses published archaeological observations.
A successful answer identifies a mechanism and its boundaries. A saved response records practice; it does not automatically establish independent understanding.
Further reading
OpenStax: Introduction to Anthropology provides disciplinary context. The opening fictional records were authored for this lesson and are not quotations from that source. The comparison below draws its factual rows from Cromwell’s NPS ceramic analysis, Table 2, PDF page 11; the worksheet prompts and visual explanations are teaching materials, not original field records.
Published assemblages: what does a larger count mean?
Fort Vancouver was a Hudson’s Bay Company trading post. These seven published archaeological assemblages contain recovered ceramic vessels. They are material traces selected by breakage, disposal, survival and excavation—not a census of household possessions.
Try and predict: Chief Factor’s House has 511 recovered vessels; House 3 has 242. Predict whether that ranking survives division by excavated volume. What would a reversal establish, and what would it leave unknown?
Temporary worksheet: controls and writing clear on reload/navigation. Copy the report below before leaving. This companion does not change saved lesson work or award understanding.
Recovered vessel count. Both bars use the same zero and a fixed maximum of 600 vessels. The scale changes only when the unit changes, never when you choose a different pair.
1. Chief Factor's House: 511 vessels
511 recovered vessels = 511 vessels.
2. House 3 Assemblage: 242 vessels
242 recovered vessels = 242 vessels.
Compare the full source table and calculation limits
Table 2, PDF page 11, in Robert J. Cromwell’s NPS ceramic analysis report (cataloged 2007). Counts refer to vessels represented in recovered material, not individual sherds. Occupation years are estimates. Reported rates are copied unchanged; calculated rates use the displayed denominators.
Source Table 2: selected columns, with separate recalculation
Assemblage
Vessels
Estimated years
Displayed m³
Published / year
Calculated / year
Published / m³
Calculated / m³
Chief Factor's House
511
20
5.26
25.55
25.55
97.18
97.1483
Bachelor's Quarters Privy (Early)
52
4
4.87
13
13
10.68
10.6776
Bachelor's Quarters Privy (Late)
110
10
4.87
11
11
22.59
22.5873
House 2 Assemblage
217
21
2.23
10.33
10.3333
97.1
97.3094
House 3 Assemblage
242
14
1.45
17.29
17.2857
167.35
166.8966
House 4 Assemblage
114
16
1.83
7.13
7.125
62.34
62.2951
Operation 14 Assemblage
156
32
14.33
4.88
4.875
10.89
10.8863
For House 3, 242 ÷ 1.45 gives about 166.8966 vessels/m³; the report prints 167.35. Unrounded underlying volumes are unavailable. A precision difference is possible, but its cause is not established. Preserve this discrepancy instead of silently correcting either value.
The early and late Bachelors Quarters rows both display 4.87 m³. We do not add their volumes or assume independent excavation samples. Table 1 uses different occupant estimates, so this activity does not merge demographic records. No count or rate identifies occupants’ ethnicity, wealth or cultural values.
Source: National Park Service, Department of the Interior. These are attributed factual table values; no images, restricted community records or field locations are reproduced. Public archaeological evidence is not community endorsement of every interpretation in the report.
Worked comparison and competing explanations
Chief Factor’s House exceeds House 3 in recovered count (511 versus 242) and per estimated year (25.55 versus about 17.2857). Per displayed m³, House 3 is higher (about 166.8966 versus 97.1483). That establishes greater recovery per sampled volume in this comparison. It does not establish more original possessions.
A concentrated discard area, different excavation coverage, survival or recovery methods could change this rate. Compare records about those processes before preferring a household-ownership explanation. The report itself limits identity inferences from ceramics. Distinguish the archaeologist’s observations from their interpretations and from your own account.
Apply to changed evidence
Compare House 4 with Operation 14. Predict the count and volume-normalized rankings before changing the measure. Explain how the sampled volumes affect the comparison, then name a record that could distinguish concentrated disposal from different recovery methods.
Keep your initial prediction above. In your revision name both assemblages and the measure, so changing the controls does not erase which comparison you meant. This changed-pair task is practice, not independently calibrated assessment.
Copy your comparison report
Copy this text to retain it. This separate report is not a progress-backup import format.
Continue by drawing a use → discard → burial → recovery sequence. Mark where each rival explanation acts, and connect it to the existing deposition task. Work only with supplied records; do not disturb or collect from real sites.
Choose your depth
High school: Build two hypotheses for each opening fictional context record and list distinguishing evidence. Then use the published NPS rows to explain one count-versus-volume comparison. Identify which evidence is fictional and which is observed; mark conclusions weakened by disturbance or recovery differences. Use a short paragraph or annotated diagram with a text equivalent.
AP connection: Use this as optional interdisciplinary evidence practice; there is no standalone AP Anthropology and cultural inquiry course. Compare two explanations using the supplied records, distinguish the fictional context exercise from the published NPS observations, and state a limitation.
Introductory college: Frame a documentary research question, document definitions and source selection, and compare the supplied mechanism with a rival explanation. Use the linked disciplinary reading to find one relevant scholarly or institutional source; distinguish it from the opening fictional exercise and from the published NPS observations. For the NPS comparison, retain displayed inputs, calculated and published rates, and unresolved source discrepancies. Submit a revision log and methods note without collecting or disturbing material.
Worked example
The intact assemblage supports a food-preparation hypothesis more strongly than the isolated decorated object supports a ritual claim. Decoration alone does not identify function.
