Quant_13B_problem_dataList: List of objects essential for an analysis of the abbreviated...

In TestGardener: Information Analysis for Test and Rating Scale Data

List of objects essential for an analysis of the abbreviated SweSAT Quantitative multiple choice test.

Description

The data are for 1000 randomly selected examinees taking 24 math analysis multiple choice questions.

Usage

Quant_13B_problem_dataList

Format

A named list.

Details

A named list with 15 members:

chcemat:

A matrix of response data with N rows and n columns where N is the number of examinees or respondents and n is the number of items. Entries in the matrices are the indices of the options chosen. Column i of chcemat is expected to contain only the integers 1,...,noption.

optList:

A list vector containing the numerical score values assigned to the options for this question.

key:

If the data are from a test of the multiple choices type where the right answer is scored 1 and the wrong answers 0, this is a numeric vector of length n containing the indices the right answers. Otherwise, it is NULL.

grbg:

A vector of length indicating which option for each item contains missing or illegal choice values. If 0, there is no such option.

SfdPar:

An fdPar object for the defining the surprisal curves.

noption:

A numeric vector of length n containing the numbers of options for each item.

nbin:

The number of bins for binning the data.

scrrng:

A vector of length 2 containing the limits of observed sum scores.

scrfine:

A fine mesh of test score values for plotting.

scrvec:

A vector of length N containing the examinee or respondent sum scores.

itemvec:

A vector of length n containing the question or item sum scores.

percntrnk:

A vector length N containing the sum score percentile ranks.

thetaQnt:

A numeric vector of length 2*nbin + 1 containing the bin boundaries alternating with the bin centers. These are initially defined as seq(0,100,len=2*nbin+1).

Sdim:

The total dimension of the surprisal scores.

PcntMarkers:

The marker percentages for plotting: 5, 25, 50, 75 and 95.

titlestr:

A string containing a title for the analysis.

TestGardener documentation built on Nov. 24, 2023, 5:08 p.m.