On some footnotes to Catharine Trotter Cockburn’s Defence of the Essay Of Human Understanding

ABSTRACT

Two footnotes added to the version of Catharine Cockburn’s Defence of the Essay Of Human Understanding (1702) reprinted in her Works (1751) have led to various accusations, including that she was confused and an inadequate interpreter of Locke’s moral epistemology. In particular, it is claimed that she did not recognize the gulf that separated her own intellectualist and internalist views from Locke’s more voluntarist and hedonistic position. This paper defends Cockburn’s interpretation of Locke, arguing that the evidence for Locke being a voluntarist and hedonist is not compelling, and that Cockburn’s interpretation of his moral epistemology is well grounded in the Essay Of Human Understanding.     

Estimating Complex Measurement and Growth Models Using the R Package PLmixed

Measurement models, such as factor analysis and item response theory models, are commonly implemented within educational, psychological, and behavioral science research to mitigate the negative effects of measurement error. These models can be formulated as an extension of generalized linear mixed models within a unifying framework that encompasses various kinds of multilevel models and longitudinal models, such as partially nonlinear latent growth models. We introduce the R package PLmixed, which implements profile maximum likelihood estimation to estimate complex measurement and growth models that can be formulated within the general modeling framework using the existing R package lme4 and function optim. We demonstrate the use of PLmixed through two examples before concluding with a brief overview of other possible models.