Educational
Interactive Demonstrations
Interactive visualizations built to make a finding legible — ERP components and experimental paradigms, synaptic and molecular mechanism, the structure of social networks, and the geometry of a qubit. Each one reconstructs a result from the primary literature and cites it.
EEG & Event-Related Potentials
Parietal ERP: Expected vs. Unexpected
An animated ERP visualization of the P300 oddball paradigm. Rare deviant stimuli elicit a dramatically larger late positive component — a hallmark of context updating in working memory. Clickable component badges reveal latency, generator, and modulation details.
Open →Language ERPs: N400 & P600
Visualizes the N400 and P600 components elicited by semantic and syntactic violations. Demonstrates their classic double dissociation, supporting distinct neural substrates for meaning and grammatical structure in language comprehension.
Open →Mismatch Negativity: Pre-attentive Auditory Deviance Detection
Toggle between attended and unattended listening and between frequency, duration, and intensity deviants to see the P3a vanish while the MMN persists intact — isolated in the deviant-minus-standard difference wave. A live scalp topography updates with each component.
Open →Source to Scalp: The EEG Forward Problem
An interactive demonstration of how a cortical current dipole projects to scalp electrodes. Drag the source, rotate its orientation, and toggle skull blurring to see why scalp EEG is spatially smeared and why radial vs. tangential dipoles produce strikingly different topographies.
Open →Cognitive Psychology
Core Psychophysics
An interactive gallery of four foundational psychophysics findings: Signal Detection Theory (d′ and criterion), Speed-Accuracy Tradeoff, Stevens' Power Law across six sensory modalities, and Hick's Law — each with live parameter controls and primary literature references.
Open →Schneider & Shiffrin (1977): Automatic vs. Controlled Processing
An interactive replication of the classic visual search paradigm. Run consistent-mapping and varied-mapping blocks and watch the RT × set-size slope flatten with consistent mapping — the signature of automaticity that defined a generation of attention research.
Open →Social Networks & Populations
Five Handshakes: Networks and the Risk of Gunshot Injury
An interactive reconstruction of Papachristos, Braga & Hureau (2012). Trace the shortest chain of ties between any person and the nearest gunshot victim, watch modelled risk fall about 25% with every step, and compare network position against individual risk factors on the same 220 people.
Open →The Confound: Contagion or Homophily?
Two generative processes run side by side on one fixed network. On the left, risk transmits along ties. On the right, nothing transmits and risk follows a latent trait that is itself clustered. Both drive the same odds ratio below one. Accumulate draws and watch the two sampling distributions sit on top of each other, which is Shalizi and Thomas's confounding result made visible.
Open →Cells, Synapses & Molecules
CRISPR-Cas9: Programmable DNA Cleavage
An animated, stage-by-stage visualization of the CRISPR-Cas9 mechanism — RNP surveillance, PAM recognition, R-loop formation, double-strand break, and NHEJ vs. HDR repair. Clickable domain badges reveal mechanistic detail and primary literature.
Open →Spike-Timing Dependent Plasticity
An animated visualization of the STDP learning rule (Bi & Poo, 1998). Set the pre/post spike interval Δt, fire pairs, and watch synaptic weight potentiate or depress. The NMDA receptor acts as the molecular coincidence detector — causal order determines synaptic fate.
Open →Consolidation & Reconsolidation: The Labile Synapse
A stage-by-stage tour from NMDA-gated Ca²⁺ influx through CaMKII and early LTP, the PKA/ERK→CREB cascade, and cellular consolidation, to retrieval-triggered reconsolidation. Toggle the anisomycin protein-synthesis inhibitor to see consolidation or reconsolidation blocked — but only when reactivation occurs.
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