""" Evaluation harness for the corvid-inspired specialists. Building the modules isn't the same as confirming they produce the actual dissociation each species result is named after. Each function here targets ONE specific claim and measures it directly, on synthetic data engineered so the two competing explanations (shallow vs. deep rule, item memory vs. relational memory, etc.) are distinguishable: eval_nutcracker_few_shot_transfer -- does training on a handful of exemplar pairs transfer the same/different RELATION to brand new item vectors, or does it only memorize the training items? (Magnotti et al. 2015) eval_rook_rule_abstraction -- when a surface cue that's redundant with the true rule in training is removed at test time, does a population of independently-initialized rook modules split into a shallow-rule majority and a deep-rule minority, the way real rooks did? (Bird & Emery 2009) eval_magpie_source_monitoring -- does self/other classification hold up as the distance between a self-generated event and the probe grows, or does it degrade with distance? eval_raven_delayed_gratification -- does the RavenForesightBuffer learn to forgo a low immediate value in favor of a stored high value item, beating an always-take-immediate baseline on cumulative realized reward? None of these need the full CorvidaeAviary model -- they exercise the specialist modules directly with synthetic data, so they can run (and be trusted) independently of whether corvidae.py's base architecture is available. Run `python corvid_eval.py` to execute all four and print a pass/fail summary against simple, stated thresholds. The thresholds are deliberately loose sanity checks, not publication-grade statistics -- tighten them once you have real task data. """ import torch import torch.nn.functional as F from species_memory_bank import NutcrackerConceptMemory from corvid_extensions import ( IndividualRookExperts, RavenForesightBuffer, NumerosityModule, CrowStatisticalMemory, IndividualRecognitionMemory, ) from species_memory_bank import MagpieSelfModel from corvidae import CausalRelationModule, MetatoolPlanningBuffer # ====================== 1. NUTCRACKER: FEW-SHOT RELATION TRANSFER ====================== def eval_nutcracker_few_shot_transfer(embedding_dim: int = 16, num_train_pairs: int = 8, num_test_pairs: int = 200, train_steps: int = 300, seed: int = 0): """ Train on `num_train_pairs` exemplar pairs (half "same" = two noisy copies of one vector, half "different" = two independent random vectors). Test on entirely new random item vectors never seen in training. If the module learned the RELATION (same/different), test accuracy should be well above chance despite the items being novel -- item memory alone can't do this, since the test items never appeared in training. """ torch.manual_seed(seed) module = NutcrackerConceptMemory(embedding_dim) opt = torch.optim.Adam(module.parameters(), lr=1e-2) def make_pairs(n): n_same = n // 2 base = torch.randn(n_same, embedding_dim) same_a = base same_b = base + torch.randn(n_same, embedding_dim) * 0.05 diff_a = torch.randn(n - n_same, embedding_dim) diff_b = torch.randn(n - n_same, embedding_dim) item_a = torch.cat([same_a, diff_a], dim=0) item_b = torch.cat([same_b, diff_b], dim=0) labels = torch.cat([torch.ones(n_same), torch.zeros(n - n_same)]) perm = torch.randperm(n) return item_a[perm].unsqueeze(1), item_b[perm].unsqueeze(1), labels[perm].unsqueeze(1) train_a, train_b, train_labels = make_pairs(num_train_pairs) test_a, test_b, test_labels = make_pairs(num_test_pairs) for _ in range(train_steps): opt.zero_grad() pair = torch.cat([train_a, train_b], dim=-1) relation = module.relation_proj(pair) relation_n = F.normalize(relation, dim=-1) same_sim = torch.einsum('bod,d->bo', relation_n, F.normalize(module.same_prototype, dim=0)) diff_sim = torch.einsum('bod,d->bo', relation_n, F.normalize(module.diff_prototype, dim=0)) same_logit = (same_sim - diff_sim) loss = module.concept_loss(same_logit, train_labels) loss.backward() opt.step() with torch.no_grad(): pair = torch.cat([test_a, test_b], dim=-1) relation = module.relation_proj(pair) relation_n = F.normalize(relation, dim=-1) same_sim = torch.einsum('bod,d->bo', relation_n, F.normalize(module.same_prototype, dim=0)) diff_sim = torch.einsum('bod,d->bo', relation_n, F.normalize(module.diff_prototype, dim=0)) test_logit = same_sim - diff_sim preds = (torch.sigmoid(test_logit) > 0.5).float() acc = (preds == test_labels).float().mean().item() return {"test_accuracy_on_novel_items": acc, "num_train_pairs": num_train_pairs, "passed": acc > 0.85} # ====================== 2. ROOK: RULE ABSTRACTION UNDER CUE REMOVAL ====================== def eval_rook_rule_abstraction(embedding_dim: int = 16, population_size: int = 7, num_train: int = 300, train_steps: int = 200, seed: int = 0): """ Builds `population_size` independently-initialized single-expert modules (a population of "individuals"), each trained on data where a surface cue (a specific input dimension) and the true abstract rule (parity of a *different* set of dimensions) are both perfectly predictive of the label. At test time the surface cue dimension is scrambled (replaced with noise uncorrelated with the label), so only a model that actually keyed on the abstract rule keeps working. Bird & Emery found 6/7 rooks locked onto the shallow cue and only 1/7 generalized. We report the fraction of the population whose accuracy holds up post cue-removal (mirrors "how many individuals abstracted the deep rule") rather than asserting a specific split, since that split is an empirical population statistic, not something to hard-code as a pass condition. """ torch.manual_seed(seed) def make_batch(n, scramble_cue: bool): x = torch.randn(n, embedding_dim) # true rule: parity (sign product) of dims 0 and 1 true_rule = (x[:, 0] * x[:, 1] > 0).float() # surface cue: dim 2, set equal to the label (+ small noise) during training, # scrambled (independent random) at test time if scramble_cue: x[:, 2] = torch.randn(n) else: x[:, 2] = true_rule * 2 - 1 + torch.randn(n) * 0.05 return x, true_rule results = [] for individual in range(population_size): torch.manual_seed(seed * 1000 + individual) # a single small "rule hypothesis" network, standing in for one rook -- built # directly rather than via IndividualRookExperts' internal K-expert mixture, # since here we want K *separate individuals*, not K experts inside one bird. net = torch.nn.Sequential( torch.nn.Linear(embedding_dim, embedding_dim), torch.nn.ReLU(), torch.nn.Linear(embedding_dim, 1) ) opt = torch.optim.Adam(net.parameters(), lr=5e-3) train_x, train_y = make_batch(num_train, scramble_cue=False) for _ in range(train_steps): opt.zero_grad() logit = net(train_x).squeeze(-1) loss = F.binary_cross_entropy_with_logits(logit, train_y) loss.backward() opt.step() with torch.no_grad(): test_x, test_y = make_batch(400, scramble_cue=True) test_logit = net(test_x).squeeze(-1) test_acc = ((torch.sigmoid(test_logit) > 0.5).float() == test_y).float().mean().item() results.append(test_acc) generalized = [r > 0.75 for r in results] return { "per_individual_test_accuracy": results, "fraction_generalized": sum(generalized) / len(generalized), "passed": 0 < sum(generalized) < population_size, # expect a SPLIT, not unanimity either way } # ====================== 3. MAGPIE: SOURCE MONITORING OVER DISTANCE ====================== def eval_magpie_source_monitoring(embedding_dim: int = 16, seq_len: int = 64, train_steps: int = 300, seed: int = 0): """ Builds sequences where each position is either "self" (a noisy copy of the module's own self_embedding, simulating re-read of the model's own prior output) or "other" (independent random content). Trains the classifier, then checks accuracy in early vs. late positions in the sequence -- a real source-monitoring system should hold up across the sequence, not just near the start; a system doing something more like short-range pattern matching would degrade with distance. """ torch.manual_seed(seed) module = MagpieSelfModel(embedding_dim) opt = torch.optim.Adam(module.parameters(), lr=1e-2) def make_batch(batch_size): is_self = (torch.rand(batch_size, seq_len) > 0.5).float() self_part = module.self_embedding.detach().unsqueeze(0).unsqueeze(0) + torch.randn(batch_size, seq_len, embedding_dim) * 0.1 other_part = torch.randn(batch_size, seq_len, embedding_dim) x = is_self.unsqueeze(-1) * self_part + (1 - is_self.unsqueeze(-1)) * other_part return x, is_self for _ in range(train_steps): opt.zero_grad() x, labels = make_batch(32) self_logit, _, _ = module(x) loss = module.self_other_loss(self_logit, labels) loss.backward() opt.step() with torch.no_grad(): x, labels = make_batch(256) self_logit, _, _ = module(x) preds = (torch.sigmoid(self_logit) > 0.5).float() correct = (preds == labels).float() early_acc = correct[:, : seq_len // 4].mean().item() late_acc = correct[:, -seq_len // 4 :].mean().item() return { "early_position_accuracy": early_acc, "late_position_accuracy": late_acc, "accuracy_gap": early_acc - late_acc, "passed": late_acc > 0.75 and abs(early_acc - late_acc) < 0.15, } # ====================== 4. RAVEN: DELAYED GRATIFICATION ====================== def eval_raven_delayed_gratification(embedding_dim: int = 16, num_episodes: int = 60, episode_len: int = 12, seed: int = 0): """ A scripted environment: at each step a candidate item arrives with a small immediate value; occasionally (every ~4 steps) a high-value item arrives that's worth much more IF the model holds it and cashes it in a few steps later rather than using whatever's immediately in front of it. We train the value head with realized-reward targets and check whether cumulative realized reward beats an always-take-immediate baseline -- the direct behavioral signature Kabadayi & Osvath were testing for. """ torch.manual_seed(seed) buffer = RavenForesightBuffer(embedding_dim, buffer_size=3, patience_cost=0.01) opt = torch.optim.Adam(buffer.parameters(), lr=1e-2) high_value_direction = torch.randn(embedding_dim) def make_episode(): items, true_values = [], [] for t in range(episode_len): if t % 4 == 0: item = high_value_direction + torch.randn(embedding_dim) * 0.05 value = torch.tensor(5.0) else: item = torch.randn(embedding_dim) value = torch.tensor(0.5) items.append(item) true_values.append(value) return torch.stack(items), torch.stack(true_values) # NOTE: computing "realized reward for the actual policy" requires tracking which # true_value corresponds to whatever got cashed in each step (immediate vs. stored); # for this sanity-check version we approximate policy quality via the learned # candidate_value's correlation with true value, and via store utilization -- a full # credit-assignment loop (matching stored items back to their original true_value on # the step they're eventually used) is straightforward but more code than belongs in # a smoke-level eval; flagged here rather than silently faked. correlations = [] for ep in range(num_episodes): buffer.reset(batch_size=1, device="cpu") items, true_values = make_episode() opt.zero_grad() pred_values = [] for t in range(episode_len): candidate = items[t : t + 1] _, info = buffer.step(candidate) pred_values.append(info["candidate_value"]) pred_values = torch.cat(pred_values) loss = buffer.value_calibration_loss(pred_values, true_values) loss.backward() opt.step() with torch.no_grad(): if pred_values.std() > 1e-6: corr = torch.corrcoef(torch.stack([pred_values, true_values]))[0, 1].item() correlations.append(corr) final_corr = sum(correlations[-10:]) / max(1, len(correlations[-10:])) return { "value_head_true_value_correlation": final_corr, "passed": final_corr > 0.6, "caveat": "Tests whether the value head learns to recognize high-value items; " "does NOT yet close the loop on full episode-level realized-reward " "credit assignment for the wait/use decision -- see NOTE in source.", } # ====================== 5. RAVEN NUMEROSITY: RELATIVE NUMBER + ADDITION ====================== def eval_numerosity(embedding_dim: int = 16, num_train: int = 300, train_steps: int = 300, seed: int = 0): """ Pika et al. (2020): ravens matched great apes on both relative-number discrimination and addition-of-hidden-quantities. We build synthetic "quantity" embeddings whose true magnitude is an underlying scalar baked into the embedding via a fixed random projection (so the model must learn to extract it, not just read it off directly), train the magnitude head on relative-number comparisons, then test BOTH relative number on novel magnitude pairs and addition (m1 + m2 vs. a third quantity) using magnitude combinations never seen during training. """ torch.manual_seed(seed) module = NumerosityModule(embedding_dim) opt = torch.optim.Adam(module.parameters(), lr=1e-2) proj = torch.randn(1, embedding_dim) # fixed encoding direction "hiding" the magnitude def encode(magnitude): return magnitude.unsqueeze(-1) * proj + torch.randn(*magnitude.shape, embedding_dim) * 0.05 def make_pairs(n, max_mag=10.0): mag_a = torch.rand(n) * max_mag mag_b = torch.rand(n) * max_mag item_a, item_b = encode(mag_a), encode(mag_b) labels = (mag_a > mag_b).float() return item_a, item_b, labels train_a, train_b, train_labels = make_pairs(num_train) for _ in range(train_steps): opt.zero_grad() _, _, _, choose_a_logit = module(train_a, train_b) loss = module.relative_number_loss(choose_a_logit, train_labels) loss.backward() opt.step() with torch.no_grad(): test_a, test_b, test_labels = make_pairs(300, max_mag=20.0) # novel magnitude range _, _, _, test_logit = module(test_a, test_b) rel_acc = ((torch.sigmoid(test_logit) > 0.5).float() == test_labels).float().mean().item() # addition: sum two never-jointly-seen magnitudes and compare to a third m1 = torch.rand(300) * 10.0 m2 = torch.rand(300) * 10.0 mc = torch.rand(300) * 20.0 item1, item2, itemc = encode(m1), encode(m2), encode(mc) add_labels = ((m1 + m2) > mc).float() _, _, add_logit = module.addition_forward(item1, item2, itemc) add_acc = ((torch.sigmoid(add_logit) > 0.5).float() == add_labels).float().mean().item() return { "relative_number_accuracy": rel_acc, "addition_accuracy": add_acc, "passed": rel_acc > 0.8 and add_acc > 0.7, } # ====================== 6. STATISTICAL INFERENCE FROM MEMORIZED PROBABILITIES ====================== def eval_statistical_inference(embedding_dim: int = 16, num_stimuli: int = 9, seed: int = 0): """ Johnston, Brecht & Nieder (2023): crows chose the higher-REWARD-PROBABILITY stimulus even when it was shown less often (lower absolute frequency) during the choice test than the alternative -- a sample-to-population inference from memorized associations, not a simple frequency-matching heuristic. We give each of `num_stimuli` fixed embeddings a true reward probability, "train" the memory with a number of learn() exposures per stimulus that's INVERSELY related to its true probability (mirroring the actual test design where the higher-probability stimulus is shown less), then check whether compare_and_choose still favors the higher-probability stimulus. """ torch.manual_seed(seed) memory = CrowStatisticalMemory(embedding_dim, memory_size=num_stimuli * 2) stimuli = torch.randn(num_stimuli, embedding_dim) true_probs = torch.linspace(0.1, 0.9, num_stimuli) # inverse exposure count: the higher-probability stimuli are seen FEWER times, # mirroring the actual experimental design's deliberate frequency/probability split exposure_counts = (50 - 40 * true_probs).long() for i in range(num_stimuli): for _ in range(int(exposure_counts[i])): observed = 1.0 if torch.rand(1).item() < true_probs[i].item() else 0.0 memory.learn(stimuli[i], observed) correct, total = 0, 0 for i in range(num_stimuli): for j in range(num_stimuli): if i == j: continue logit = memory.compare_and_choose(stimuli[i], stimuli[j]) predicted_prefers_i = logit.item() > 0 true_prefers_i = true_probs[i] > true_probs[j] correct += int(predicted_prefers_i == true_prefers_i.item()) total += 1 accuracy = correct / total return { "pairwise_choice_accuracy": accuracy, "note": "Higher-probability stimuli were shown FEWER times during learning, so " "high accuracy here means the model tracked probability, not raw frequency.", "passed": accuracy > 0.75, } # ====================== 7. CAUSAL ANALOGY TRANSFER (TRAP-TUBE -> TRAP-TABLE) ====================== def eval_causal_analogy_transfer(embedding_dim: int = 16, num_surface_contexts: int = 4, train_steps: int = 400, seed: int = 0): """ Taylor et al. (2009): NC crows solved a trap-tube then immediately transferred to a trap-TABLE sharing no visual features. We build synthetic contexts where the true outcome depends only on an abstract "causal" feature (e.g. hole-relative-position, encoded as one direction in embedding space) while a "surface" feature (apparatus identity/appearance, encoded as a different, context-specific direction) is correlated with outcome only within each training surface context. At test time we introduce a BRAND NEW surface context (never seen in training) where only the causal feature still predicts the outcome. A model that leaned on surface features should fail on the new context; one with genuine causal invariance should not. """ torch.manual_seed(seed) module = CausalRelationModule(embedding_dim, num_surface_contexts=num_surface_contexts) opt = torch.optim.Adam(module.parameters(), lr=1e-2) causal_direction = torch.randn(embedding_dim) surface_directions = torch.randn(num_surface_contexts + 1, embedding_dim) # +1 = held-out test context def make_batch(n, surface_context: int): causal_val = torch.randn(n) outcome = (causal_val > 0).float() x = (causal_val.unsqueeze(-1) * causal_direction + torch.randn(n) .unsqueeze(-1) * surface_directions[surface_context] * 0.8 + torch.randn(n, embedding_dim) * 0.1) surface_label = torch.full((n,), surface_context, dtype=torch.long) return x.unsqueeze(1), outcome.unsqueeze(1), surface_label.unsqueeze(1) # add a seq_len=1 dim for _ in range(train_steps): opt.zero_grad() ctx = torch.randint(0, num_surface_contexts, (1,)).item() x, outcome, surface_label = make_batch(32, ctx) _ = module(x) loss = (module.outcome_loss(module.last_outcome_logit, outcome) + module.surface_adversary_loss(module.last_surface_logits, surface_label)) loss.backward() opt.step() with torch.no_grad(): # held-out, never-seen surface context (index num_surface_contexts) x, outcome, _ = make_batch(300, num_surface_contexts) _ = module(x) preds = (torch.sigmoid(module.last_outcome_logit) > 0.5).float() transfer_acc = (preds == outcome).float().mean().item() return { "transfer_accuracy_novel_surface_context": transfer_acc, "passed": transfer_acc > 0.75, } # ====================== 8. METATOOL SUB-GOAL / DISTRACTOR SUPPRESSION ====================== def eval_metatool_subgoal_distractor(embedding_dim: int = 16, train_steps: int = 300, seed: int = 0): """ Gruber et al. (2019): crows kept a functional sub-goal AND a distractor sub-goal in mind simultaneously across out-of-sight stages, but specifically suppressed the distractor's influence on behavior. We give the buffer a sequence where a "functional subgoal" signal and a "distractor subgoal" signal are both written, then check that the buffer's read-out correlates with the functional signal much more than with the distractor signal after training the distractor gate to fire when distractor content is present. """ torch.manual_seed(seed) buffer = MetatoolPlanningBuffer(embedding_dim, num_slots=3) opt = torch.optim.Adam(buffer.parameters(), lr=1e-2) functional_direction = torch.randn(embedding_dim) distractor_direction = torch.randn(embedding_dim) def make_sequence(batch_size, seq_len=6): # step 0: "observe" functional subgoal; step 1: "observe" distractor subgoal; # remaining steps: neutral context (subgoals now out of sight) seq = torch.randn(batch_size, seq_len, embedding_dim) * 0.1 seq[:, 0, :] += functional_direction seq[:, 1, :] += distractor_direction return seq for _ in range(train_steps): opt.zero_grad() buffer.clear() x = make_sequence(16) read = buffer(x) final_read = read[:, -1, :] # read-out at the last (out-of-sight) step # train distractor gate to suppress: push final read AWAY from distractor # direction and TOWARD functional direction target = functional_direction.unsqueeze(0).expand(final_read.size(0), -1) loss = F.mse_loss(final_read, target) loss.backward() opt.step() with torch.no_grad(): buffer.clear() x = make_sequence(64) read = buffer(x) final_read = F.normalize(read[:, -1, :], dim=-1) func_sim = (final_read @ F.normalize(functional_direction, dim=0)).mean().item() distractor_sim = (final_read @ F.normalize(distractor_direction, dim=0)).mean().item() return { "functional_subgoal_similarity": func_sim, "distractor_subgoal_similarity": distractor_sim, "passed": func_sim > distractor_sim + 0.2, } # ====================== 9. ASYMMETRIC ONE-SHOT THREAT LEARNING ====================== def eval_individual_recognition_asymmetric_learning(embedding_dim: int = 16, seed: int = 0): """ Marzluff et al. (2012): a SINGLE capture event is enough to teach a crow a face is dangerous; positive/neutral associations seem to build more gradually. We check that IndividualRecognitionMemory's valence estimate after ONE threatening exposure is much larger in magnitude than after ONE caring exposure, directly from the asymmetric learning rate. """ torch.manual_seed(seed) memory = IndividualRecognitionMemory(embedding_dim, capacity=8) face_threat = torch.randn(embedding_dim) face_caring = torch.randn(embedding_dim) memory.update(face_threat, event_valence=-1.0) # one capture event memory.update(face_caring, event_valence=1.0) # one feeding event with torch.no_grad(): valence_threat, _, known_threat = memory.recognize(face_threat) valence_caring, _, known_caring = memory.recognize(face_caring) return { "valence_after_one_threat_event": valence_threat.item(), "valence_after_one_caring_event": valence_caring.item(), "passed": abs(valence_threat.item()) > abs(valence_caring.item()) and known_threat.item() and known_caring.item(), } if __name__ == "__main__": print("=== Nutcracker: few-shot same/different transfer ===") r1 = eval_nutcracker_few_shot_transfer() print(r1) print("\n=== Rook: rule abstraction under cue removal ===") r2 = eval_rook_rule_abstraction() print(r2) print("\n=== Magpie: source monitoring over distance ===") r3 = eval_magpie_source_monitoring() print(r3) print("\n=== Raven: delayed gratification (value calibration) ===") r4 = eval_raven_delayed_gratification() print(r4) print("\n=== Raven numerosity: relative number + addition ===") r5 = eval_numerosity() print(r5) print("\n=== Statistical inference from memorized reward probabilities ===") r6 = eval_statistical_inference() print(r6) print("\n=== Causal analogy transfer (trap-tube -> trap-table style) ===") r7 = eval_causal_analogy_transfer() print(r7) print("\n=== Metatool sub-goal / distractor suppression ===") r8 = eval_metatool_subgoal_distractor() print(r8) print("\n=== Asymmetric one-shot threat learning ===") r9 = eval_individual_recognition_asymmetric_learning() print(r9) print("\n=== summary ===") results = [ ("nutcracker", r1), ("rook", r2), ("magpie", r3), ("raven_foresight", r4), ("numerosity", r5), ("statistical_inference", r6), ("causal_analogy", r7), ("metatool_distractor", r8), ("identity_asymmetric_learning", r9), ] for name, r in results: print(f"{name}: {'PASS' if r['passed'] else 'FAIL'}")