Statistical Methods for Psychologists

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Documentation for package ‘statpsych’ version 1.9.0

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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.diversity Confidence intervals for diversity indices
ci.etasqr Confidence interval for eta-squared
ci.fisher Fisher confidence interval
ci.icc Confidence interval for an intraclass reliablity coefficient
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.mean.scheffe Scheffe 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.prop.scheffe Scheffe 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.gen Confidence intervals for generalized means
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.sd Confidence interval for a standard deviation
ci.sign Confidence interval for the parameter of the one-sample sign test
ci.slope Confidence interval for a slope in a simple linear model
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 a sample correlation in a future study
pi.cronbach Prediction limits for sample value of Cronbach reliability in a future study
pi.prop Prediction interval for a sample proportion in a future study
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 a sample variance in a future study
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 an estimated correlation 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.cronbach.prior Sample size for a Cronbach reliability confidence interval using an reliability estimate from a prior study
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.icc Sample size for a intraclass correlation confidence interval
size.ci.icc.prior Sample size for an intraclass correlation confidence interval using a planning value from a prior study
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 an estimated variance 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 an estimated proportion 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.sd Sample size for a standard deviation 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
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