Bayes Hit
Number of players:
2-6
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Objective:
Identify clinic features that distinguish similar diagnoses
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Materials needed:
Make Your Own!
This is a game that is meant to be customized by the teacher. If you have already created a game, or want to use one of the sample worksheets (Weakness or Chest Pain), skip to SETUP below.
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Print out one or more copies of the Bayes Hit Worksheet.
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In the first column, generate three diagnoses that share overlapping clinical features. Here are some examples that are both neurology-specific appropriate for other fields of medicine. If you would like to use more than three diagnoses, print out additional worksheets.
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In each shaded box, generate one feature that may be relevant to one or more of the diseases. Examples include:
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Symptoms​
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Physical exam findings
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Imaging findings
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Laboratory results
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Patient demographics
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Risk factors
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Disease course
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Pathophysiology
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Treatment
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Try to include features that call into several categories:​
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Features that are more common in Disease A, B, or C​
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Features that are shared by two diseases
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Features that are shared by all diseases
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Features found in none of the diseases
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The goal is to create a site of clues that can help discriminate between diagnoses.
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Cut out all cards and separate into diagnosis cards and feature cards.
Setup:
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Shuffle the feature cards and place the face down as a deck.
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Choose two diagnosis cards and place them face up on the table. These will be referred to as Disease A and Disease B for the round.
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Draw two feature cards and place them face up between the diagnoses. These are the starting features.
Game Play:
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Players take turns drawing a feature card from the deck and placing it face up to form a feature discard pile.
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Players race to identify a set.
What counts as a set? A set is formed when the two starting features and the feature on top of the discard pile fall into one of the following patterns?
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All three features make Disease A more likely than Disease B
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All three features make Disease B more likely than Disease A
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All three features do not help distinguish between the two diseases. (This can include features shared by both diseases, or features found in neither disease.)
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One of each... one feature that favors Disease A, one that favors Disease B, and one that does not help.
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As soon as a player believes that the top card on the feature discard pile forms a set with the two starting features, they slap the face-up pile.
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If a player slaps a pile, they must explain why the three features form a set.
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If they are correct, they take the top feature card as a point. If they are incorrect, they lose a point (indicated by discarding a card they have previously taken for scoring) and play continues
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After a successful set:
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Discard the the two starting feature cards.
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Replace one diagnosis card with a different diagnosis from the unused pile.
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Draw two new features cards as starting features.
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Play continues
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Winning the game. The first player to collect five feature cards wins.
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