Key comparisons carried out by the Consultative Committees (CCs) of the International Committee of Weights and Measures (CIPM) or the Bureau International des Poids et Mesures (BIPM) are referred to as CIPM key comparisons. The outputs of a statistical analysis of the data from a CIPM key comparison are the key comparison reference value, the degrees of equivalence, and their associated uncerta...

background : to identify correlates related to retention time of a cohort study of the opioid-dependent patients participating in the methadone maintenance treatment (mmt) program offered by a major addiction treatment clinic in tehran, iran between april 2007 and march 2011. methods : several parametric survival models assuming weibull, log-normal and log-logistic distributions were compared t...

A wide class of structural models on multivariate normal covariance matrices can be expressed using symmetries. For example, a multivariate normal vector has the intraclass correlation structure (where all variances are equal, and all covariances are equal) if the covariance matrix is invariant under permutation of the components, and the components are independent if the covariance matrix in i...

We report three experiments corroborating a prediction of the theory of mental models about reasoning. In realistic problems deriving from those used in the Graduate Record Examination (GRE), logically untrained individuals are able to cope better with conditional assertions, which have only a single explicit mental model, than with disjunctive assertions, which have multiple explicit mental mo...

People reject ‘paradoxical’ inferences, such as: Luisa didn’t play music; therefore, if Luisa played soccer, then she didn’t play music. For some theorists, they are invalid for everyday conditionals, but valid in logic. The theory of mental models implies that they are valid, but unacceptable because the conclusion refers to a possibility inconsistent with the premise. Hence, individuals shoul...