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REDM

A collection of R packages for educational datamining

Bayesian Knowledge Tracing

Examples

Simulate learning performance from given parameters

# create a parameters object. In order: (init, learn, guess, slip)
p <- as.bkt.params( c( 0.1, 0.15, 0.2, 0.25) )

# simulate up to 20 learning steps for 10 students:
sim <- bkt.sim( 10, 20, p )

Use brute-force search to recover parameters

bforce.search( sim$opps )

# search over finer grained grid
# CAUTION: this can become *very* slow
bforce.search( sim$opps, bforce.search.grid(0.01) )

Recover parameters via Hidden Markov Model inference

# fit a BKT HMM with random initial params and simulated data
hmm <- bkt.hmm.fit( as.bkt.params( runif(4) ), sim$opps )
hmm