“SIMSTAT DEBERÍA RECIBIR SERIA CONSIDERACIÓN POR LOS CIENTÍFICOS SOCIALES INTERESADOS EN UNA ALTER”
— Social Science Computer Review

WHAT’S NEW IN VERSION 2.5?

1. New factor analysis module (formerly Easy Factor Analysis add-on).

  1. Image covariance or principal components and principal axis analysis on up to 2000 variables.
  2. QType factor analysis
  3. Number of factors extracted can be set manually or adjusted to a minimum eigenvalue criteria
  4. Scree plot of eigenvalues.
  5. Optional varimax orthogonal rotation of factor loadings.
  6. Optional printing of descriptive statistics and correlation matrix for all the variables in the data set.
  7. Printing of unrotated and/or rotated factor solutions.
  8. Can compute factor scoring weights for both the rotated and unrotated solutions.
  9. Factor scores can be displayed on screen or saved on disk

2. New classical item analysis module (formely StatItem add-on) for scale development and testing of multiple-choice item questionnaires.

  1. Can perform item analysis on questionnaires with up to 2000 items.
  2. Missing values can be excluded (case wise) or treated as incorrect responses.
  3. Item statistics (frequency & percentage of endorsement, item-total biserial & point-biserial correlation, Cronbach’s alpha if item deleted, user defined discrimination index).
  4. Item-total endorsement rate matrix and item characteristic curves (based on original scores or smoothed data)
  5. Item-total response breakdown to compare the percentage of correct responses among several groups of equal size (between 2 and 10 groups)
  6. Scale total statistics (mean, median, minimum and maximum, standard deviation, standard error, skewness, kurtosis, Cronbach’s alpha, Ferguson discrimination index, etc)
  7. Summary statistics on percent correct, biserial and point-biserial correlations.
  8. Frequency distribution of total scores.
  9. Option to save scale totals on disk.

3. Importation of Microsoft Accesss data files.

4. Notebook window now stores results in Rich Text Format (fixed font).

  1. Ability to change font attributes (bold, italic, strikeout, underline, color).
  2. Ability to highlight text.
  3. Ability to print highlighted outputs and export them to RTF files.

5. Web update provides an easy way to get interim releases of Simstat.

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