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⚠️ This symbol means that CogStat will handle data differently compared to previous releases. Trivial changes when a new feature is added are not denoted.

Upcoming release

New features

  • Output may be edited (Results > Text is editable menu)
  • New localization
    • Norwegian Bokmål (Irmelin Hovland-Hegg)

1.8.0 (9 Apr 2019)

New features

  • Charts
    • Use themes for the charts
    • Set theme in CogStat > Preferences menu
    • Various chart refinements
  • New hypothesis tests
    • Dunn's post hoc test after significant Kruskal-Wallis test
    • Single case test for slope index
  • Numerical results
    • Display mean estimations numerically in group comparison and in repeated measures comparison
    • Display standardized effect sizes separately
    • Various smaller refinements
  • Output improvements
    • In warning massages add links to pages with more information about fixing the issue
    • Various smaller output refinements
  • Sample data
    • Add sample data files
    • Add menu to open sample data files (Data > Open demo data files...)
  • Graphical user interface improvements
    • Add text zooming option to Results menu (Results > Increase text size, Results > Decrease text size)
    • Add splash screen
  • Simpler installation
    • Simpler Mac installation (thanks to Márton Nagy, Anna Rákóczi and András Csép)
    • Simpler Linux installation
  • New localizations
    • Slovak (Katarína Sümegiová)
    • Thai (Jinshana Praemcheun)

Fixes

  • ⚠️ Fix single-case modified t-test
  • Various bugfixes
  • Mac specific bug fixes (thanks to Márton Nagy, Anna Rákóczi and András Csép)

1.7.0 (18 June 2018)

New features

  • Import SPSS .sav file
  • Two-way group comparisons
  • Dotted axis for nominal variables and for grouping variables
  • More numerical descriptives for explore variables, repeated measures variable comparison and group comparison analyses
  • Update checker
  • Various output refinements

Fixes

  • Various bugfixes

1.6.0 (11 December 2017)

New features

  • Standard deviation in Explore variable
    • ⚠️ SD of the sample is not population estimation anymore
    • Add population estimation of the SD
  • In Explore variable, for ordinal variables only minimum and maximum is calculated instead of the range
  • Population estimations are displayed in tables
  • More coherent output for hypothesis tests
  • Mac support (thanks to Magdolna Kovács)

Fixes

  • Localization fixes
  • Output fixes

1.5.0 (30 September 2017)

New features

  • In an analysis, raw data are diplayed first without any graphical addition
  • Display results in groups of (1) raw data, (2) sample properties and (3) population properties
  • Rank information is displayed for ordinal variables (in single variable, in variable pairs (in scatterplot) and in group comparison)
  • Aim of the hypothesis tests are displayed.
  • Use Wilcoxon signed-rank test when normality is violated in an interval variable

Fixes

  • Spearman rank correlation is denoted as rs (s is subscript) instead of r.
  • When quitting CogStat, no confirmation is asked
  • Various smaller fixes

1.4.2 (3 June 2017)

New features

  • ⚠️ One sample Wilcoxon signed-rank test now shows the T statistic, instead of the W statistic.
  • New localization (test versions, they include some bugs)
    • Croatian (Sandra Stojić)
    • Persian (Sara Hosseininezhad)

Fixes

  • Statistics fixes
    • One sample Wilcoxon signed-rank test is available on Windows version, too (Szonja Weigl)
    • Fix test statistic name (show T instead of W) in paired Wilcoxon test
    • ⚠️ Paired sample t-test assumption check now checks normality of the difference of the variables
  • Updated links in the CogStat menu
  • Localization related issues
    • Fix some RTL languages related issues
    • Reworked German version (Roman Ricardo Pota)
  • Various smaller fixes

1.4.1 (17 April 2016)

Fixes

  • Bugfix: repeated measures ANOVA does not run on Windows

1.4.0 (16 April 2016)

New features

  • Repeated measures ANOVA (Ákos Laczkó)
    • Repeated measures one-way ANOVA
    • Mauchly's test for sphericity
    • Greenhouse-Geisser correction
    • Post-hoc pairwise comparison with Holm-Bonferroni correction
  • Confidence interval for correlation coefficients
  • McNemar test
  • Cochran's Q test
  • Welch's t-test
  • Output improvements
    • More informative and simpler text when checking assumptions in hypothesis tests
  • New localization
    • Hebrew (Tzipi Buchman)

Fixes

  • Various bugfixes
  • Updated Language files
    • Bulgarian (Petia Kojouharova)
    • Hungarian

1.3.1 (16 January 2016)

Fixes

  • Various bugfixes
  • Updated Language files
    • German (László Veller)
    • Romanian (Orsolya Kiss)

1.3.0 (4 September 2015)

New features

  • IPython Notebook integration - see https://github.com/cogstat/cogstat/wiki/IPython-Notebook
    • All CogStat functions are available in IPython Notebook
    • Import pandas data frame (only in IP NB mode)
  • Filtering based on single variable outlier (only in IP NB mode at the moment)
  • New localization
    • Bulgarian (Petia Kojouharova)

Fixes

  • Fix memory leak after several analyses (less memory is required now)
  • Refactoring
    • Rework of the data import part (uses pandas now), resulting in faster import
  • Output improvements
    • Proper html tables are used in most analyses
    • Various minor improvements
  • Various minor bugfixes

1.2.0 (22 May 2015)

New features

  • Statistics improvements
    • ⚠️ Improved normality test: Shapiro-Wilk test instead of Anderson-Darling test (thanks to Ákos Laczkó)
    • Confidence interval for the difference between two groups
  • Output improvements
    • Individual data signs are proportional with the number of cases for a value in explore variables, compare variables and compare groups functions
    • Titles for all graphs
    • For interval variable mean graphs with confidence interval are shown in variable and group comparisons
    • Wrap labels on graph axis
    • In some cases more concise output with tables. It is also easier now to copy those results to a spreadsheet
    • Confidence interval (numerical result) is in APA format now
  • New localization
    • German (László Veller)

Fixes

  • New unit tests are run automatically before each release to ensure that statistics are calculated correctly (thanks to Gábor Lengyel)
  • Various bugfixes

1.1.0 (18 August 2014)

New features

  • Use modified t-test when comparing a single case and a group (available in group comparison) (thanks to Judit Kárpáti)
  • New functions for pivot tables: lower quartile and upper quartile
  • Localizations of CogStat
    • All menus and texts (except the dialogs) are localized
    • Initial support for new languages:
      • Hungarian (Attila Krajcsi)
      • Italian (Eszter Temesvári)
      • Romanian (Orsolya Kiss)
    • New command: CogStat > Preferences to set the language

Fixes

  • Correct median in pivot tables for variables including missing data
  • Various bugfixes

1.0.0 (16 July 2014)

New features

Installation

  • Installer for Windows
  • Run from source on Linux

Data import

  • From clipbord (copied from a spreadsheet software)
  • From csv

Data

  • Display data (optionally only the first few lines)

Analysis

  • Explore variable
    • Frequency
    • Distribution (histogram, raw data points, box plot)
    • Descriptives (N, mean, standard deviation, skewness, kurtosis, median, range)
    • Test normality (Anderson-Darling test, histogram with normality test, Q-Q plot)
    • Test central tendency (one sample t-test, confidence interval of the mean, Wilcoxon sign test)
  • Explore variable pairs
    • Pearson and Spearman coefficients
    • Linear regression parameters
    • Scatter plot or mosaic plot
  • Pivot
    • Functions: N, sum, mean, median, standard deviation, variance
  • Compare variables
    • Descriptives: means, medians or contingency table
    • Diagrams: boxplot with individual data or mosaic plot
    • Hypothesis tests: paired t-test, paired Wilcoxon test, Friedman test
  • Compare groups
    • Descriptives: means, medians or contingency tables
    • Diagrams: boxplot with individual data or contingency table
    • Hypothesis tests: independent smaples t-test, Mann-Whitney test, Chi-square test, one sample ANOVA, Kruskal-Wallis test

Results

  • Clear window
  • Save results as pdf
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