NEWS.md

In catSurv: Computerized Adaptive Testing for Survey Research

catSurv 1.5.0

Minor Changes

• Addressed warning messages about bitwise operators in C++ code
• Removed 'boost' C++ libraries because no longer using for distribution functions

catSurv 1.4.0

Minor Changes

• All Cat objects are reverted to the bounds of [-5,5]. Likewise, the Cat class defaults are now [-5,5].

• Newton Raphson bug fixed. Bug was causing estimates when no questions have been answered to go to extremes rather than prior mean.

• simulateThetas() has a new argument (defaulted to FALSE for backwards compatibility) that when TRUE returns a list of dataframes containing adaptive answer profiles for each Cat objected involved in the simulation

catSurv 1.3.0

Minor Changes

• All Cat objects now use integration bounds of [-4,4]. Likewise, the Cat class defaults are now [-4,4]. This narrows the bounds of integration from [-5,5] to avoid computational issues that arise at "extreme" values of the latent trait.

• Cat object z slot still defaults to .9, but now in calculating delta for certain integration routines, the package executes qnorm(z).

• oracle() function adds option for parallel computing using plyr

• probability() for categorical data now throws errors to account for extreme values of latent trait that may cause computational issues

catSurv 1.2.0

Minor Changes

• simulateRespondents() bug fix when respondent's answer in raw data is NA, now transform to -1 to indicate a skip

• added dataset of Need to Evaluate raw response profiles

• readQualtrics() now has respondent ID as rownames instead of a column.

• Added example data for the readQualtrics() function.

catSurv 1.1.3

Major Changes

• New functions simulateRespondents(), simulateThetas(), simulateFisherInfo(), and oracle() allow for simulation exercises to evaluate model quality and performace.

• New function plot.Cat() allows for visual representation of item parameters.

• New functions fromJSONCat(), toJSONCat(), and readQualtrics() aid the user in creating an adaptive battery in Qualtrics using catSurv.

Minor Changes

• The slot ids was added to the Cat object representing each question item's unique identifier.

• selectItem() returns a third item, next_item_name which represents the unique identifier of the item that should be asked next.

• lookAhead() now returns the next best item given the question is skipped.

catSurv 1.0.3

Major Changes

• New functions estimateThetas() and simulateThetas() allow for estimation of ability parameter for dataframe of response sets.

Minor Changes

• Streamlined checkStopRules().

catSurv 1.0.2

Major Changes

• Parallelized main functionality of package --- selectItem().

Bug Fixes

• Fixed bug in ltmCat(), tpmCat(), grmCat(), and gpcmCat() by adding the ltm package to Imports.
• Fixed bug in KL functions, where we were integrating over a function that itself called integration.
• Removed versioning from stats and methods imports as it caused errors in testing with r-oldrel.

catSurv 1.0.1

• Corrected errors regarding portability of code to Solaris operating systems.

catSurv documentation built on Dec. 4, 2022, 1:15 a.m.