Statistical Methods for Psychologists

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Documentation for package ‘statpsych’ version 1.8.0

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A C E F I P R S T

-- A --

adj.se Adjusted standard errors for slope coefficients in an exploratory analysis

-- C --

ci.2x2.mean.bs Computes tests and confidence intervals of effects in a 2x2 between-subjects design for means
ci.2x2.mean.mixed Computes tests and confidence intervals of effects in a 2x2 mixed design for means
ci.2x2.mean.ws Computes tests and confidence intervals of effects in a 2x2 within-subjects design for means
ci.2x2.median.bs Computes tests and confidence intervals of effects in a 2x2 between-subjects design for medians
ci.2x2.median.mixed Computes confidence intervals in a 2x2 mixed design for medians
ci.2x2.median.ws Computes confidence intervals of effects in a 2x2 within-subjects design for medians
ci.2x2.prop.bs Computes tests and confidence intervals of effects in a 2x2 between- subjects design for proportions
ci.2x2.prop.mixed Computes tests and confidence intervals of effects in a 2x2 mixed design for proportions
ci.2x2.stdmean.bs Computes confidence intervals of standardized effects in a 2x2 between-subjects design
ci.2x2.stdmean.mixed Computes confidence intervals of standardized effects in a 2x2 mixed design
ci.2x2.stdmean.ws Computes confidence intervals of standardized effects in a 2x2 within-subjects design
ci.agree Confidence interval for a G-index of agreement
ci.agree.3rater Computes confidence intervals for a 3-rater design with dichotomous ratings
ci.agree2 Confidence interval for G-index difference in a 2-group design
ci.bayes.cor Bayesian credible interval for a Pearson or partial correlation with a skeptical prior
ci.bayes.normal Bayesian credible interval for a normal prior distribution
ci.bayes.prop Bayesian credible interval for a proportion
ci.bayes.spcor Bayesian credible interval for a semipartial correlation with a skeptical prior
ci.biphi Confidence interval for a biserial-phi correlation
ci.bscor Confidence interval for a biserial correlation
ci.cod Confidence interval for a coefficient of dispersion
ci.condslope Confidence intervals for conditional (simple) slopes in a linear model
ci.condslope.log Confidence intervals for conditional (simple) slopes in a logistic model
ci.cor Confidence interval for a Pearson or partial correlation
ci.cor.dep Confidence interval for a difference in dependent Pearson correlations
ci.cor2 Confidence interval for a 2-group Pearson correlation difference
ci.cor2.gen Confidence interval for a 2-group correlation difference
ci.cqv Confidence interval for a coefficient of quartile variation
ci.cramer Confidence interval for Cramer's V
ci.cronbach Confidence interval for a Cronbach reliability
ci.cronbach2 Confidence interval for a difference in Cronbach reliabilities in a 2-group design
ci.cv Confidence interval for a coefficient of variation
ci.etasqr Confidence interval for eta-squared
ci.fisher Fisher confidence interval
ci.indirect Confidence interval for an indirect effect
ci.kappa Confidence interval for two kappa reliability coefficients
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.lc.mean.bs Confidence interval for a linear contrast of means in a between-subjects design
ci.lc.median.bs Confidence interval for a linear contrast of medians in a between-subjects design
ci.lc.prop.bs Confidence interval for a linear contrast of proportions in a between- subjects design
ci.lc.reg Confidence interval for a linear contrast of regression coefficients in multiple group regression model
ci.lc.stdmean.bs Confidence interval for a standardized linear contrast of means in a between-subjects design
ci.lc.stdmean.ws Confidence interval for a standardized linear contrast of means in a within-subjects design
ci.mad Confidence interval for a mean absolute deviation
ci.mann Confidence interval for a Mann-Whitney parameter
ci.mape Confidence interval for a mean absolute prediction error
ci.mean Confidence interval for a mean
ci.mean.fpc Confidence interval for a mean with a finite population correction
ci.mean.ps Confidence interval for a paired-samples mean difference
ci.mean2 Confidence interval for a 2-group mean difference
ci.median Confidence interval for a median
ci.median.ps Confidence interval for a paired-samples median difference
ci.median2 Confidence interval for a 2-group median difference
ci.oddsratio Confidence interval for an odds ratio
ci.pairs.mult Confidence intervals for pairwise proportion differences of a multinomial variable
ci.pairs.prop.bs Bonferroni confidence intervals for all pairwise proportion differences in a between-subjects design
ci.pbcor Confidence intervals for point-biserial correlations
ci.phi Confidence interval for a phi correlation
ci.poisson Confidence interval for a Poisson rate
ci.popsize Confidence interval for an unknown population size
ci.prop Confidence intervals for a proportion
ci.prop.fpc Confidence interval for a proportion with a finite population correction
ci.prop.inv Confidence interval for a proportion using inverse sampling
ci.prop.ps Confidence interval for a paired-samples proportion difference
ci.prop2 Confidence interval for a 2-group proportion difference
ci.prop2.inv Confidence interval for a 2-group proportion difference using inverse sampling
ci.pv Confidence intervals for positive and negative predictive values with retrospective sampling
ci.random.anova Confidence intervals for parameters of one-way random effects ANOVA
ci.ratio.cod2 Confidence interval for a ratio of dispersion coefficients in a 2-group design
ci.ratio.cv2 Confidence interval for a ratio of coefficients of variation in a 2-group design
ci.ratio.mad.ps Confidence interval for a paired-samples MAD ratio
ci.ratio.mad2 Confidence interval for a 2-group ratio of mean absolute deviations
ci.ratio.mape2 Confidence interval for a ratio of mean absolute prediction errors in a 2-group design
ci.ratio.mean.ps Confidence interval for a paired-samples mean ratio
ci.ratio.mean2 Confidence interval for a 2-group mean ratio
ci.ratio.median.ps Confidence interval for a paired-samples median ratio
ci.ratio.median2 Confidence interval for a 2-group median ratio
ci.ratio.poisson2 Confidence interval for a ratio of Poisson rates in a 2-group design
ci.ratio.prop.ps Confidence interval for a paired-samples proportion ratio
ci.ratio.prop2 Confidence interval for a 2-group proportion ratio
ci.ratio.sd2 Confidence interval for a 2-group ratio of standard deviations
ci.rel2 Confidence interval for a 2-group reliability difference
ci.reliability Confidence interval for a reliability coefficient
ci.rsqr Confidence interval for squared multiple correlation
ci.sign Confidence interval for the parameter of the one-sample sign test
ci.slope.mean.bs Confidence interval for the slope of means in a one-factor experimental design with a quantitative between-subjects factor
ci.slope.median.bs Confidence interval for the slope of medians in a one-factor experimental design with a quantitative between-subjects factor
ci.slope.prop.bs Confidence interval for a slope of a proportion in a single-factor experimental design with a quantitative between-subjects factor
ci.spcor Confidence interval for a semipartial correlation
ci.spear Confidence interval for a Spearman correlation
ci.spear2 Confidence interval for a 2-group Spearman correlation difference
ci.stdmean Confidence interval for a standardized mean
ci.stdmean.ps Confidence intervals for a paired-samples standardized mean difference
ci.stdmean.strat Confidence intervals for a 2-group standardized mean difference with stratified sampling
ci.stdmean2 Confidence intervals for a 2-group standardized mean difference
ci.tetra Confidence interval for a tetrachoric correlation
ci.theil Theil-Sen estimate and confidence interval for slope
ci.tukey Tukey-Kramer confidence intervals for all pairwise mean differences in a between-subjects design
ci.var.upper Upper confidence limit of a variance
ci.yule Confidence intervals for generalized Yule coefficients

-- E --

etasqr.adj Bias adjustment for an eta-squared estimate
etasqr.gen.2way Generalized eta-squared estimates in a two-factor design
expon.slope Confidence interval for an exponentiated slope

-- F --

fitindices SEM fit indices

-- I --

iqv Indices of qualitative variation

-- P --

pi.cor Prediction limits for an estimated correlation
pi.prop Prediction interval for an estimated proportion
pi.score Prediction interval for one score
pi.score.ps Prediction interval for difference of scores in a 2-level within-subjects experiment
pi.score2 Prediction interval for a difference of scores in a 2-group experiment
pi.var Prediction limits for an estimated variance
power.cor Approximates the power of a correlation test for a planned sample size
power.cor2 Approximates the power of a test for equal correlations in a 2-group design for planned sample sizes
power.lc.mean.bs Approximates the power of a test for a linear contrast of means for planned sample sizes in a between-subjects design
power.mean Approximates the power of a one-sample t-test for a planned sample size
power.mean.ps Approximates the power of a paired-samples t-test for a planned sample size
power.mean2 Approximates the power of a two-sample t-test for planned sample sizes
power.prop Approximates the power of a 1-group proportion test for a planned sample size
power.prop.ps Approximates the power of a paired-samples test of equal proportions for a planned sample size
power.prop2 Approximates the power of a 2-group proportion test for planned sample sizes

-- R --

random.sample Generate a random sample
random.y Generate random sample of scores
random.yx Generates random bivariate scores
randomize Randomize a sample into groups

-- S --

signal Parameter estimates for a signal detection study
sim.ci.cor Simulates confidence interval coverage probability for a Pearson correlation
sim.ci.mean Simulates confidence interval coverage probability for a mean
sim.ci.mean.ps Simulates confidence interval coverage probability for a paired-samples mean difference
sim.ci.mean2 Simulates confidence interval coverage probability for a 2-group mean difference
sim.ci.median Simulates confidence interval coverage probability for a median
sim.ci.median.ps Simulates confidence interval coverage probability for a median difference in a paired-samples design
sim.ci.median2 Simulates confidence interval coverage probability for a median difference in a 2-group design
sim.ci.spear Simulates confidence interval coverage probability for a Spearman correlation
sim.ci.stdmean.ps Simulates confidence interval coverage probability for a standardized mean difference in a paired-samples design
sim.ci.stdmean2 Simulates confidence interval coverage probability for a standardized mean difference in a 2-group design
size.ci.agree Sample size for a G-index confidence interval
size.ci.ancova2 Sample size for a 2-group ANCOVA confidence interval
size.ci.biphi Sample size for biserial-phi correlation confidence interval
size.ci.condmean Sample size for a conditional mean confidence interval
size.ci.cor Sample size for a Pearson or partial correlation confidence interval
size.ci.cor.prior Sample size for a Pearson correlation confidence interval using a planning value from a prior study
size.ci.cor2 Sample size for a 2-group Pearson correlation difference confidence interval
size.ci.cronbach Sample size for a Cronbach reliability confidence interval
size.ci.cronbach2 Sample size for a 2-group Cronbach reliability difference confidence interval
size.ci.cv Sample size for a coefficient of variation
size.ci.etasqr Sample size for an eta-squared confidence interval
size.ci.gen Sample size for a confidence interval for any type of parameter
size.ci.gen2 Sample size for a confidence interval for the difference of any type of parameter
size.ci.indirect Sample size for an indirect effect confidence interval
size.ci.lc.ancova Sample size for a linear contrast confidence interval in an ANCOVA
size.ci.lc.mean.bs Sample size for a between-subjects mean linear contrast confidence interval
size.ci.lc.mean.ws Sample size for a within-subjects mean linear contrast confidence interval
size.ci.lc.median.bs Sample size for a between-subjects median linear contrast confidence interval
size.ci.lc.prop.bs Sample size for a between-subjects proportion linear contrast confidence interval
size.ci.lc.stdmean.bs Sample size for a between-subjects standardized linear contrast of means confidence interval
size.ci.lc.stdmean.ws Sample size for a within-subjects standardized linear contrast of means confidence interval
size.ci.mape Sample size for a mean absolute prediction error confidence interval
size.ci.mean Sample size for a mean confidence interval
size.ci.mean.prior Sample size for a mean confidence interval using a planning value from a prior study
size.ci.mean.ps Sample size for a paired-samples mean difference confidence interval
size.ci.mean2 Sample size for a 2-group mean difference confidence interval
size.ci.median Sample size for a median confidence interval
size.ci.median2 Sample size for a 2-group median difference confidence interval
size.ci.oddsratio Sample size for an odds ratio confidence interval
size.ci.pbcor Sample size for a point-biserial correlation confidence interval
size.ci.phi Sample size for phi correlation confidence interval
size.ci.prop Sample size for a proportion confidence interval
size.ci.prop.prior Sample size for a proportion confidence interval using a planning value from a prior study
size.ci.prop.ps Sample size for a paired-sample proportion difference confidence interval
size.ci.prop2 Sample size for a 2-group proportion difference confidence interval
size.ci.ratio.mean.ps Sample size for a paired-samples mean ratio confidence interval
size.ci.ratio.mean2 Sample size for a 2-group mean ratio confidence interval
size.ci.ratio.prop.ps Sample size for a paired-samples proportion ratio confidence interval
size.ci.ratio.prop2 Sample size for a 2-group proportion ratio confidence interval
size.ci.rsqr Sample size for a squared multiple correlation confidence interval
size.ci.second Sample size for a second-stage confidence interval
size.ci.slope Sample size for a slope confidence interval
size.ci.slope.gen Sample size for a slope confidence interval in a general statistical model
size.ci.spear Sample size for a Spearman correlation confidence interval
size.ci.spear2 Sample size for a 2-group Spearman correlation difference confidence interval
size.ci.stdmean.ps Sample size for a paired-samples standardized mean difference confidence interval
size.ci.stdmean2 Sample size for a 2-group standardized mean difference confidence interval
size.ci.tetra Sample size for a tetrachoric correlation confidence interval
size.ci.yule Sample size for a Yule's Q confidence interval
size.equiv.mean.ps Sample size for a paired-samples mean equivalence test
size.equiv.mean2 Sample size for a 2-group mean equivalence test
size.equiv.prop.ps Sample size for a paired-samples proportion equivalence test
size.equiv.prop2 Sample size for a 2-group proportion equivalence test
size.interval.cor Sample size for an interval test of a Pearson or partial correlation
size.supinf.mean.ps Sample size for a paired-samples mean superiority or noninferiority test
size.supinf.mean2 Sample size for a 2-group mean superiority or noninferiority test
size.supinf.prop.ps Sample size for a paired-samples superiority or inferiority test of proportions
size.supinf.prop2 Sample size for a 2-group superiority or inferiority test of proportions
size.test.ancova2 Sample size for a 2-group ANCOVA hypothesis test
size.test.cor Sample size for a test of a Pearson or partial correlation
size.test.cor2 Sample size for a test of equal Pearson or partial correlation in a 2-group design
size.test.cronbach Sample size to test a Cronbach reliability
size.test.cronbach2 Sample size to test equality of Cronbach reliability coefficients in a 2-group design
size.test.gen Sample size for a test of any type of parameter
size.test.gen2 Sample size for a test of 2-group difference for any type of parameter
size.test.lc.ancova Sample size for a mean linear contrast test in an ANCOVA
size.test.lc.mean.bs Sample size for a test of a between-subjects mean linear contrast
size.test.lc.mean.ws Sample size for a test of a within-subjects mean linear contrast
size.test.lc.prop.bs Sample size for a test of between-subjects proportion linear contrast
size.test.mann Sample size for a Mann-Whitney test
size.test.mean Sample size for a test of a mean
size.test.mean.ps Sample size for a test of a paired-samples mean difference
size.test.mean2 Sample size for a test of a 2-group mean difference
size.test.prop Sample size for a test of a single proportion
size.test.prop.ps Sample size for a test of a paired-samples proportion difference
size.test.prop2 Sample size for a test of a 2-group proportion difference
size.test.sign Sample size for a 1-group sign test
size.test.sign.ps Sample size for a paired-samples sign test
size.test.slope Sample size for a test of a slope
size.test.slope.gen Sample size for a slope hypothesis test in a general statistical model
slope.contrast Contrast coefficients for the slope of a quantitative factor
spearmanbrown Computes the reliability of a scale with r2 measurements given the reliability of a scale with r1 measurements

-- T --

test.anova.bs Between-subjects F statistic and eta-squared from summary information
test.cor Hypothesis test for a Pearson or partial correlation
test.cor2 Hypothesis test for a 2-group Pearson or partial correlation difference
test.kurtosis Computes p-value for test of excess kurtosis
test.mean Hypothesis test for a mean
test.mono.mean.bs Test of a monotonic trend in means for an ordered between-subjects factor
test.mono.median.bs Test of a monotonic trend in medians for an ordered between-subjects factor
test.mono.prop.bs Test of monotonic trend in proportions for an ordered between-subjects factor
test.prop Hypothesis test for a proportion
test.prop.bs Hypothesis test of equal proportions in a between-subjects design
test.prop.ps Hypothesis test for a paired-samples proportion difference
test.prop2 Hypothesis test for a 2-group proportion difference
test.skew Computes p-value for test of skewness
test.spear Hypothesis test for a Spearman correlation
test.spear2 Hypothesis test for a 2-group Spearman correlation difference