add pimsleur-study reference material (transcripts + analysis)

Co-authored-by: Cursor <cursoragent@cursor.com>

pimsleur-study/ANALYSIS.md

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+# Pimsleur Spanish — Tape Format, Activities & Methodology
+
+ASR study of the Pimsleur Spanish course (levels I–V) to establish the tape
+format, the activities present, and the underlying methodology.
+
+## Corpus
+
+Source: `/home/j/projects/Pimsleur Spanish/` (~4.5 GB):
+
+| Level | Units | Notes |
+|-------|-------|-------|
+| Spanish I   | 30 | + separate **Reading Lessons** track (booklet-based) |
+| Spanish II  | 30 | |
+| Spanish III | 30 | |
+| Spanish IV  | ~26 | |
+| Spanish V   | ~30 (51 files) | extra material |
+
+Each unit ≈ **30 min** (~30 MB MP3). ~85 hours total.
+
+Transcribed with **Soniox `stt-async-v4`** (es+en hints), with the long learner
+pauses annotated (they encode the "your turn" windows). Sample read for this
+write-up: I-01, I-02, I-15, I-30; II-01; III-01; IV-01; V-01; Reading-01.
+Transcripts live in `pimsleur-study/transcripts/`.
+
+## Unit format (the ~30-minute "tape")
+
+Consistent across all levels:
+
+1. **Header + target dialogue, cold** — *"This is Unit N of Pimsleur's Spanish L. Listen to this conversation."* then the native-speed Spanish dialogue. `[I-01 00:02]`
+2. **Dialogue replay** — *"Listen again / Escuche otra vez."* `[II-01 00:41]`
+3. **Core drill body (~25 min)** — a continuous stream of recall prompts that (a) rebuild the dialogue piece by piece and (b) interleave previously-learned material at expanding intervals.
+4. **Final replay + role-play** — *"Now imagine you are the American…"*; the learner performs one side of the conversation from cues. `[I-01 26:36]`
+5. **Close** — mastery gate (*"If you've mastered about 80%… move on"*), *"This is the end of Unit N."* `[I-01 29:36]`. The last unit of a level hands off to the Reading track. `[I-30 29:18]`
+
+## Activities present
+
+- **A. Listen-to-dialogue** — comprehension; cold open + replays.
+- **B. New-item intro: Listen & Repeat with *backward buildup*** — a phrase is taught from the END backward to preserve intonation: *"Don" → "Per" → "Perdón."* `[I-01 00:55–01:12]`
+- **C. Pronunciation coaching** — explicit micro-notes: the Spanish `r`, vowel quality, silent `h`, double-`ll` = /y/, stress on the next-to-last syllable. `[I-01 02:22; Reading-01 03:13]`
+- **D. Graduated-Interval Recall prompts (the core engine)** — instruction → **silent pause** (learner produces aloud) → native **confirmation**. Prompt forms:
+  - *"How do you say X?"* / *"Say X."*
+  - *"Ask: Do you…?"* / *"Answer: …"*
+  - English meaning → Spanish production (*"I don't speak English."* → pause → *"No hablo inglés."*)
+  Items reappear at lengthening intervals (spaced retrieval).
+- **E. Recombination / transformation** — assemble new utterances from known parts; reorder for questions (*"reverse the first two words to ask 'Are you American?'"*). `[I-01 23:34]`
+- **F. Number / set drills** — counting, telling time, woven into the same prompt loop. `[I-15 01:13+]`
+- **G. Role-play / anticipation** — *"you are X; respond"* multi-turn simulated conversation. `[IV-01 01:36]`
+- **Reading track (separate)** — phonics/decoding from a booklet: read printed words aloud after the model with spelling→sound rules; word → phrase progression. Optional, *"one reading after every other unit, or at the end."* `[Reading-01]`
+
+## Methodology (Pimsleur principles, with evidence)
+
+- **Graduated Interval Recall** — expanding-interval spaced retrieval is the spine of every unit.
+- **Principle of Anticipation** — the learner is cued to **produce before hearing the answer** (active recall, not echoing), enforced by the timed pause + confirmation.
+- **Backward buildup** for new phrases (keeps natural prosody).
+- **Audio-only core, minimal explicit grammar** — patterns are induced from examples; grammar is named only in passing (*"question intonation"*, *"literally, in a trip of business"*). Reading/writing is fully separated into the optional Reading track.
+- **Tight core of high-frequency vocabulary**, recycled relentlessly.
+- **L1 → L2 instruction fade** — the language of *instruction* shifts from English (L1) toward Spanish by L4 (*"Trate de decir…"*, *"Contéstele"*, *"¿A qué se dedica?"*); English is kept only to specify the meaning to produce. `[IV-01, V-01]`
+- **One 30-min unit/day, strictly sequential; ~80% mastery to advance.**
+
+## Progression across levels
+
+- **L1** — single words → short phrases; English narrator; heavy scaffolding + method explanation. Topics: greetings, understand/speak, numbers, time. `[I-01, I-15]`
+- **L2** — fuller social dialogue; present perfect (*"he estado", "he hablado"*); narrator starts instructing in Spanish (*"¿Se acuerda de…?"*, *"Dígale…"*). `[II-01]`
+- **L3** — longer multi-turn dialogues (dinner party); past/future, weather, travel; instructions largely Spanish. `[III-01]`
+- **L4** — near-native Spanish instruction; full-sentence production with long (7–8 s) pauses; professional/travel scenarios. `[IV-01]`
+- **L5** — extended scenarios (gifts, family, shopping); subjunctive (*"algo que tenga que ver con México"*); more material (~50 files). `[V-01]`
+
+## Data-quality notes
+
+- Soniox handles the bilingual audio well; **word starts** are reliable (ends are not — irrelevant here).
+- This model didn't return per-token language, so the `(??)` tags in the `.txt` are not split EN/ES (the text itself makes the language obvious). If we want clean EN/ES segmentation we can post-classify per word by script + a small lexicon.
+- Pause markers approximate the learner-response windows and make the **prompt → produce → confirm** rhythm legible.
+
+## Implications for our content (ALC / module player)
+
+- Pimsleur's **prompt → timed pause → confirmation** maps almost 1:1 onto our PRODUCE activity (prompt → respond window → model response) and the repeat/respond cues already built into the player/video.
+- **Backward buildup** and **graduated-interval recall scheduling** are concrete, portable mechanics we could add as activity types / a scheduler.
+- The **L1→L2 instruction fade** is a design lever: progressively localize instructions into the target language as the learner advances.