Simstat 2.5 New Features

• New factor analysis module (formerly Easy Factor Analysis add-on).
  • Image covariance or principal components and principal axis analysis on up to 2000 variables.
  • QType factor analysis
  • Number of factors extracted can be set manually or adjusted to a minimum eigenvalue criteria
  • Scree plot of eigenvalues.
  • Optional varimax orthogonal rotation of factor loadings.
  • Optional printing of descriptive statistics and correlation matrix for all the variables in the data set.
  • Printing of unrotated and/or rotated factor solutions.
  • Can compute factor scoring weights for both the rotated and unrotated solutions.
  • Factor scores can be displayed on screen or saved on disk
• New classical item analysis module (formerly StatItem add-on) for scale development and testing of multiple-choice item questionnaires.
  • Can perform item analysis on questionnaires with up to 2000 items.
  • Missing values can be excluded (case wise) or treated as incorrect responses.
  • Item statistics (frequency & percentage of endorsement, item-total biserial & point-biserial correlation, Cronbach's alpha if item deleted, user defined discrimination index).
  • Item-total endorsement rate matrix and item characteristic curves (based on original scores or smoothed data)
  • Item-total response breakdown to compare the percentage of correct responses among several groups of equal size (between 2 and 10 groups)
  • Scale total statistics (mean, median, minimum and maximum, standard deviation, standard error, skewness, kurtosis, Cronbach's alpha, Ferguson discrimination index, etc)
  • Summary statistics on percent correct, biserial and point-biserial correlations.
  • Frequency distribution of total scores.
  • Option to save scale totals on disk.
• Importation of Microsoft Access data files.
• Notebook window now stores results in Rich Text Format (fixed font).
  • Ability to change font attributes (bold, italic, strikeout, underline, color).
  • Ability to highlight text.
  • Ability to print highlighted outputs and export them to RTF files.
• Web update provides an easy way to get interim releases of Simstat.
• New HTML help file; ability to resize data columns with the mouse; other miscellaneous improvement.

New features of version 2.0 can be found here.