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PMLE Local Interpretability Practice Question

Match each ML model interpretability method to its description.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts
Matches

Game-theoretic approach to explain feature contributions

Local surrogate model to explain individual predictions

Ranking features by their impact on model output

Shows marginal effect of a feature on predictions

Measures decrease in performance when feature is shuffled

⚠ Common exam trap

The most common trap is confusing local vs global interpretability methods. LIME and SHAP are local, while PDP and Permutation Importance are global.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

LIME: Local interpretable model-agnostic explanations by approximating locally with a simpler model.

LIME (Local Interpretable Model-agnostic Explanations) provides local explanations by approximating the model's behavior near a specific prediction using a simpler interpretable model. SHAP (SHapley Additive exPlanations) uses Shapley values from game theory to fairly distribute feature contributions for individual predictions. Partial Dependence Plots (PDP) show the average marginal effect of one or two features on the predicted outcome across the dataset, making it a global method. Permutation Feature Importance measures the increase in prediction error when a feature's values are randomly shuffled, indicating feature importance globally. Common mistakes: confusing LIME with a global method (B) and misattributing SHAP to visualizing decision trees (D).

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✓

    LIME: Local interpretable model-agnostic explanations by approximating locally with a simpler model.

    Why this is correct

    LIME (Local Interpretable Model-agnostic Explanations) approximates the model's predictions locally using a simpler interpretable model.

  • ✗

    LIME: Global interpretability method that provides feature importance rankings across entire dataset.

    Why it's wrong here

    This describes permutation feature importance or global methods, not LIME which is local.

  • ✓

    SHAP: Shapley additive explanations based on game theory to compute feature contributions.

    Why this is correct

    SHAP uses Shapley values from cooperative game theory to assign importance to each feature.

  • ✗

    SHAP: A method for visualizing individual decision trees.

    Why it's wrong here

    SHAP is not limited to trees; it is model-agnostic, though TreeSHAP is a variant for tree-based models.

  • ✓

    Partial Dependence Plot: Shows average marginal effect of one or two features on predicted outcome.

    Why this is correct

    Partial dependence plots illustrate how the model's predictions change as one or two features vary.

  • ✓

    Permutation Feature Importance: Measures decrease in model performance when feature values are shuffled.

    Why this is correct

    Permutation importance computes the drop in model score when a feature's values are randomly permuted.

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