Getting started with SGPmatrices

Damian W Betebenner

Introduction

The R package SGPmatrices contains baseline coefficient matrices for use with the SGP in calculating baseline SGPs. The package is under active development by staff at the Center for Assessment.

Contents

The baseline coefficient matrices embedded in SGPmatrices are updated periodically. Current contents include:

  • AZ_Baseline_Matrices: Contains 2021 baseline matrices for Arizona AzM2.
  • CO_Baseline_Matrices: Contains 2021 baseline matrices for Colorado CMAS and PSAT/SAT.
  • HI_Baseline_Matrices: Contains 2021 baseline matrices for Hawaii SBA.
  • IN_Baseline_Matrices: Contains 2021 baseline matrices for Indiana ILEARN/ISTEP+.
  • MA_Baseline_Matrices: Contains 2021 baseline matrices for Massachusetts MCAS 2.0/PARCC.
  • MI_Baseline_Matrices: Contains 2021 baseline matrices for Michigan MSTEP/PSAT/SAT.
  • NH_Baseline_Matrices: Contains 2021 baseline matrices for New Hampshire SAS.
  • RI_Baseline_Matrices: Contains 2021 baseline matrices for Rhode Island RICAS/PARCC.
  • UT_Baseline_Matrices: Contains 2021 baseline matrices for Utah RISE and Utah Aspire Plus (with SAGE equated).
  • WIDA_Baseline_Matrices: Contains 2021 baseline matrices for multiple WIDA members.
  • WIDA_CO_Baseline_Matrices: Contains 2021 baseline matrices for Colorado WIDA-ACCESS.
  • WIDA_HI_Baseline_Matrices: Contains 2021 baseline matrices for Hawaii WIDA-ACCESS.
  • WIDA_IN_Baseline_Matrices: Contains 2021 baseline matrices for Indiana WIDA-ACCESS.
  • WIDA_MA_Baseline_Matrices: Contains 2021 baseline matrices for Massachusetts WIDA-ACCESS.
  • WIDA_NH_Baseline_Matrices: Contains 2021 baseline matrices for New Hampshire WIDA-ACCESS.
  • WIDA_RI_Baseline_Matrices: Contains 2021 baseline matrices for Rhode Island WIDA-ACCESS.

Use of SGPmatrices

After installing the package from GitHub, one conducts baseline SGP calculations with the matrices in this package. Baseline matrices are added to the SGPstateData object embedded in the SGP prior to running SGP analyses supply the appropriate state abbreviation and year to the addBaselineMatrices function. For example:

SGPstateData <- SGPmatrices::addBaselineMatrices("AZ", "2021")

Examples 

SGPstateData <- SGPmatrices::addBaselineMatrices("WIDA", "2021", add.matrices.to.which.state="WIDA_RI")

Contributions & Requests

If you have contributions of baseline matrices or a feature request for the SGPmatrices package, don’t hesitate to write or set up an issue on GitHub.