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API overview

Scale

Creation

• load_scale
• load_predefined_scale
• create_scale_from_csv
• create_scale_from_df
• create_subscale

Manipulation

• remove_items

Display scale information

• all_items
• item_level_count
• item_parameter_names
• items_by_type
• items_in_categories
• scale_overview

Save scale

• save_scale

Model

Creation

• irt_model

Add model features

• add_dataset
• add_simulation
• add_lv_model
• add_estimation_option

Set model attributes

• set_scale
• set_initial_estimates
• set_initial_estimates_table
• set_run_number
• fix_item_parameters
• ignore_items
• consolidate_levels
• consolidate_levels_below

Display model information

• list_initial_estimates

Code generation

• print_model_code
• write_model_code

Estimation

• estimate_item_parameters
• estimate_lv_values

Diagnostic plots

• correlation_plot
• icc_plots
• mirror_plots

Utility

• check_data
• prepare_lv_analysis