using immex as an alternative to laboratory exams charlie cox, presenter melanie m. cooper ron...
DESCRIPTION
IMMEX Problems Prolog Problem Space HTML Tracking Ability Dialog BoxesTRANSCRIPT
Using IMMEX as an Alternative to Laboratory Exams
Charlie Cox, PresenterMelanie M. Cooper
Ron StevensRebecca PeaseValerie Smith
What is IMMEX?
• Internet - Based Software• Designed at UCLA Medical School• Case - Based Problems
IMMEX Problems
• Prolog• Problem Space• HTML Tracking Ability• Dialog Boxes
Prolog Screen Shot
Problem Space
Search Path Maps
Assessment Techniques
Artificial Neural Networks
Hidden Markov Modeling
Item Response Theory
Artifical Neural Networks
• Pattern Recognition• Groups similar strategies• Represented using Nodes
Node Description
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0.2
0.4
0.6
0.8
1
1.2
Problem Space Item
PROBABILITY
Background
Flame, Solubility,Conductivity
Litmus
HCl,NaOH
Precipitins
6 x 6 Node Description
Hidden Markov Models
• Predictive Modeling• More simplistic than nodes• Described using five states
Hidden Markov Models (HMMs)
Item Response Theory
• Separates latent abilities from item characteristics.
• Model:
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logP(xj=1P(xj=0 ⎛ ⎝ ⎜ ⎜ ⎞
⎠ ⎟ ⎟=θ−bj
Laboratory Problems
• Separation• Hazmat• TLC• Finding Carbons Neighbors• Spectra Analysis
Separations
Solved Separation
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Finding Carbons Neighbors
• Chemical Tests• Physical Tests• Library
Chromatography Challenge
• Unknown identification based upon TLC analyses.
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Spectra Analysis
• 1H, 13C, IR, and MS data is available for students to elucidate an unknown’s structure.
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1H NMR Spectra
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Other Features
1. Example Spectra a. Benzaldehyde b. 2-butanone c. Benzene d. Butylamine e. Propionic Acid2. Correlation Tables3. Library
Implementation
• Second semester organic laboratory.• Used as part of the laboratory practical (50%)• Students are told to answer 4 cases correctly with a guessing penalty.