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Direct linkLix, Lisa M.; Sajobi, Tolulope – Psychological Methods, 2010
This study investigates procedures for controlling the familywise error rate (FWR) when testing hypotheses about multiple, correlated outcome variables in repeated measures (RM) designs. A content analysis of RM research articles published in 4 psychology journals revealed that 3 quarters of studies tested hypotheses about 2 or more outcome…
Descriptors: Hypothesis Testing, Correlation, Statistical Analysis, Research Design
Bonnett, Douglas G. – Psychological Methods, 2008
Most psychology journals now require authors to report a sample value of effect size along with hypothesis testing results. The sample effect size value can be misleading because it contains sampling error. Authors often incorrectly interpret the sample effect size as if it were the population effect size. A simple solution to this problem is to…
Descriptors: Intervals, Hypothesis Testing, Effect Size, Sampling
Lanza, Stephanie T.; Collins, Linda M.; Schafer, Joseph L.; Flaherty, Brian P. – Psychological Methods, 2005
Latent class analysis (LCA) provides a means of identifying a mixture of subgroups in a population measured by multiple categorical indicators. Latent transition analysis (LTA) is a type of LCA that facilitates addressing research questions concerning stage-sequential change over time in longitudinal data. Both approaches have been used with…
Descriptors: Markov Processes, Monte Carlo Methods, Evaluation Methods, Evaluation Research
