NEWS

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statpsych 1.6.0 (2024-07-09)

Changes:

• New functions:

  • ci.mean.fpc -- Computes confidence interval for a mean with a finite population correction
  • ci.prop.fpc -- Computes confidence interval for a proportion with a finite population correction
  • ci.poisson -- Computes confidence interval for a Poisson rate
  • ci.ratio.poisson2 -- Computes confidence interval for a ratio of Poisson rates in a 2-group design
  • ci.bscor -- Computes confidence interval for a biserial correlation
  • pi.cor -- Computes prediction interval for an estimated correlation
  • pi.prop -- Computes prediction interval for an estimated proportion
  • test.cor -- Hypothesis test for a Pearson or partial correlation (for zero or non-zero null hypotheses)
  • test.spear -- Hypothesis test for a Spearman correlation (for zero or non-zero null hypotheses)
  • test.cor2 -- Hypothesis test for a 2-group Pearson or partial correlation difference
  • test.spear2 -- Hypothesis test for a 2-group Spearman correlation difference
  • test.mean -- Hypothesis test for a mean using summary information
  • size.ci.cor2 -- Computes sample size for a 2-group Pearson correlation difference confidence interval
  • size.ci.spear2 -- Computes sample size for a 2-group Spearman correlation difference confidence interval
  • size.ci.tetra -- Computes sample size for a tetrachoric correlation confidence interval
  • size.ci.mean.prior -- Computes sample size for a mean confidence interval using a planning value from a prior study
  • size.ci.prop.prior -- Computes sample size for a proportion confidence interval using a planning value from a prior study
  • size.ci.cor.prior -- Computes sample size for a correlation confidence interval using a planning value from a prior study
  • adj.se -- Computes adjusted standard errors for slope coefficients in an exploratory analysis
  • fitindices -- Computes four SEM fit indices

• Modifications:

  • ci.var.upper now computes an exact upper limit rather than an approximate upper limit
  • power computations are now more accurate for very small effect sizes in the power.cor, power.cor2, power.lc.meanc.bs, power.mean, power.mean2, power.mean.ps, power.prop, power.pro2, and power.prop.ps functions
  • size.test.prop and size.test.prop2 now assume the test statistic will use a continuity correction
  • one-group function names that end with a "1" have been renamed and now exclude the "1" (for naming consistency and to avoid confusion with lower case L).
  • ci.mape2 has been renamed ci.ratio.mape2, and ci.cod2 has been renamed ci.ratio.cod2
  • The ci.phi function now uses a Fisher transformation for improved coverage probability performance

statpsych 1.5.0 (2023-12-20)

Changes:

• New functions:
  • ci.cv1 -- Computes confidence interval for a coefficient of variation
  • ci.ratio.cv2 -- Computes confidence interval for a ratio of coefficients of variation
  • ci.pv -- Computes confidence intervals for positive and negative predictive values with retrospective sampling
  • ci.2x2.stdmean.ws -- Computes confidence intervals of standardized effects in a 2x2 within-subjects design
  • ci.2x2.stdmean.mixed -- Computes confidence intervals of standardized effects in a 2x2 mixed design
  • ci.2x2.median.ws -- Computes confidence intervals of effects in a 2x2 within-subjects design for medians
  • ci.2x2.median.mixed -- Computes confidence intervals of effects in a 2x2 mixed design
    for medians
  • spearmanbrown -- Computes the reliability of a scale with r2 measurements given the reliability of a scale with r1 measurements
  • size.ci.spear -- Computes the sample size requirement for a Spearman correlation confidence interval
  • size.ci.pbcor -- Computes the sample size requirement for a point-biserial correlation confidence interval
  • size.ci.mape1 -- Computes the sample size requirement for a mean absolute prediction error confidence interval
• Error Corrections:
  • corrected CI error in ci.cramer
  • corrected SE error in ci.lc.stdmean.ws
• Modifications:
  • both biased and bias adjusted estimates are now reported in ci.stdmean1, ci.stdmean2, ci.stdmean.ps, ci.stdmean.strat, and ci.2x2.stdmean.bs
  • ci.mape has been renamed ci.mape1

statpsych 1.4.0 (2023-06-14)

Changes:

• New functions:
  • power.prop1 -- Computes power for 1-sample test of proportion for a planned sample size
  • power.prop2 -- Computes power for 2-sample test of proportion for planned sample sizes
  • power.prop.ps -- Computes power for paired-samples test of proportion for a planned sample size
  • power.mean1 -- Computes power for 1-sample t-test for a planned sample size
  • power.mean2 -- Computes power for 2-sample t-test for planned sample sizes
  • power.mean.ps -- Computes power for paired-samples t-test for a planned sample size
  • power.lc.mean.bs -- Computes power of a test for a linear contrast of means for planned sample sizes in a between-subjects design
  • power.cor1 -- Computes power for 1-sample test of correlation for a planned sample size
  • power.cor2 -- Computes power for 2-sample test of correlations for planned sample sizes
  • ci.cqv1 -- Computes confidence interval for a population coefficient of qualitative variation
  • ci.prop1.inv -- Computes confidence interval for a population proportion using inverse
    sampling
  • ci.prop2.inv -- Computes confidence interval for a difference in population proportions using inverse sampling
  • ci.agree.3rater -- Computes confidence intervals for a 3-rater design with dichotomous ratings
  • ci.ratio.sd2 -- Computes robust confidence interval for ratio of standard deviations in a 2-group design
  • size.test.cor2 -- Computes sample size for a test of equal Pearson or partial correlation in a 2-group design
  • size.test.cronbach2 -- Computes sample size to test equality of Cronbach reliability
    coefficients in a 2-group design
  • size.ci.cronbach2 -- Computes sample size for a 2-group Cronbach reliability difference confidence interval
  • size.ci.etasqr -- Computes sample size for an eta-squared confidence interval
  • size.ci.indirect -- Computes sample size for an indirect effect confidence interval
  • ci.mape2 -- Computes confidence interval for a ratio of mean absolute prediction errors in a 2-group design
  • ci.rel2 -- Computes confidence interval for a 2-group reliability difference
  • ci.cronbach2 -- Computes confidence interval for a difference in Cronbach reliabilities in
    a 2-group design
  • ci.2x2.stdmean.bs -- Computes confidence intervals of standardized effects in a 2x2 between-subjects design for means
  • ci.2x2.median.bs -- Computes confidence intervals of effects in a 2x2 between-subjects design for medians
  • pi.var.upper -- Computes upper prediction limit for an estimated variance
  • ci.bayes.normal -- Computes Bayesian credible interval for any parameter estimator with a normal sampling distributuion using a Normal prior distribution
  • ci.bayes.prop1 -- Computes Bayesian credible interval for a single proportion using a Beta prior distribution
• Modifications:
  • Corrected Example output in ci.reliability and ci.prop.ps
  • SE added to output in: ci.cronbach, ci.oddsratio, ci.yule, ci.etasqr, ci.rsqr, ci.spear2, ci.cor2, ci.cor.dep, ci.cod1, ci.mad1, ci.mape, ci.agree2, ci.pbcor, and ci.tetra
  • Improved accuracy in size.ci.rsqr
  • Three generalized Yule coefficients added to ci.yule
  • The ci.prop.ps, ci.ratio.prop.ps, and ci.2x2.prop.mixed functions now define proportions for the y = 1 category rather than the y = 0 category.

statpsych 1.3.0 (2023-01-11)

Changes:

• New functions:
  • ci.theil -- Theil-Sen estimate and confidence interval for slope
  • sim.ci.median2 -- Simulates confidence interval coverage probability for a median difference in a two-group design
  • sim.ci.median.ps -- Simulates confidence interval coverage probability for a median difference in a paired design
  • sim.ci.stdmean2 -- Simulates confidence interval coverage probability for a standardized mean difference in a two-group design
  • pi.score.ps -- Prediction interval for difference of scores in a 2-level within-subjects experiment
• Updated outputs:
  • ci.cod1 -- first column is 'Estimate', no longer 'COD'
  • ci.cod2 -- first column is 'Estimate', no longer 'COD1'
  • ci.cramer -- first column is 'Estimate', no longer 'Cramer's V'
  • ci.lc.stdmean.bs -- now returns 3 rows, adding sample size for group 1 standardizer
  • ci.lc.stdmean.ws -- now returns two rows, one for each standardizer
  • ci.mad1 -- first column is 'Estimate', no longer 'MAD'
  • ci.mape -- first column is 'Estimate', no longer 'MAPE'
  • size.ci.lc.stdmean.bs -- now returns two rows, one for each standardizer
  • size.ci.lc.stdmean.ws -- now returns two rows, one for each standardizer
  • size.ci.stdmean2 -- now returns two rows, one for each standardizer
  • size.ci.stdmean.ps -- now returns two rows, one for each standardizer
  • ci.mann -- now returns a confidence interval for P(y1 > y2) rather than P(y1 < y2).
• Error Correction:
  • ci.lc.std.mean.ws -- corrected an error in the standard error computation

statpsych 1.2.0 (2022-08-19)

Changes:

• New functions:
  • ci.cramer - Confidence interval for Cramer's V
  • ci.2x2.mean.bs - Confidence intervals for effects in a 2x2 between-subjects design for means
  • ci.2x2.mean.ws - Confidence intervals for effects in a 2x2 within-subjects design for means
  • ci.2x2.mean.mixed - Confidence intervals for effects in a 2x2 mixed design for means
  • ci.2x2.prop.bs - Confidence intervals for effects in a 2x2 between-subjects design for proportions
  • ci.2x2.prop.mixed - Confidence intervals for effects in a 2x2 mixed design for proportions
  • sim.ci.mean1 – Simulation of confidence interval for a mean
  • sim.ci.mean2 – Simulation of confidence interval for mean difference in a two-group design
  • sim.ci.mean.ps – Simulation of confidence interval for mean difference in a paired-samples design
  • sim.ci.median1 – Simulation of confidence interval for a single median
  • sim.ci.cor – Simulation of confidence interval for a Pearson correlation
  • sim.ci.spear – Simulation of confidence interval for a Spearman correlation
• Modifications:
  • The ci.prop.ps function now outputs an adjusted point estimate of the proportion difference, as stated in the documentation, rather than an unadjusted estimate
  • The ci.cor, ci.cor2, and ci.cor.dep functions now uses a bias adjustment to reduce the bias of the Fisher transformed correlations
  • The ci.median1 function now uses the same standard error formula as the ci.median2, ci.ratio.median2, and ci.median.ps functions
• Error Correction:
  • Corrected an error for the standard error computation in the ci.indirect function

statpsych 1.1.0 (2022-06-22)

Changes:

• New functions:
  • ci.agree2 - Confidence interval for G-index difference in a 2-group design
  • ci.cod2 - Confidence interval for a ratio of dispersion coefficients in a 2-group
  • ci.etasqr - Confidence interval for eta-squared
  • ci.lc.gen.bs - Confidence interval for a linear contrast of parameters in a between-subjects design
  • ci.lc.glm - Confidence interval for a linear contrast of general linear model parameters
  • ci.reliability - Confidence interval for a reliability coefficient
  • ci.rsqr - Confidence interval for squared multiple correlation
  • ci.sign1 - Confidence interval for the parameter of the one-sample sign test
  • ci.slope.mean.bs - Confidence interval for the slope of means in a single-factor design with a quantitative between-subjects factor
  • test.kurtosis - Computes Monte Carlo p-value for test of excess kurtosis
  • test.skew - Computes Monte Carlo p-value for test of skewness
  • test.mono.mean.bs - Test of a monotonic trend in means for an ordered between-subjects factor
  • test.mono.prop.bs - Test of monotonic trend in proportions for an ordered between-subjects
  • etasqr.gen.2way - Computes generalized eta-squared estimates in a two-factor design
• Updated documentation for consistency
• Changed arguments for some functions for consistency
  • size.test.cronbach now takes (alpha, pow, rel, r, h) rather than (alpha, pow, rel, a, h)
  • ci.cronbach now takes (alpha, rel, r, n) rather than (alpha, rel, a, n)
• Changed some of the column names in returned matrixes for consistency:
  • ci.median.ps, the last column is now "COV" rather than "cov"

statpsych 1.0.0 (2021-09-09)

• Initial release