The subject of factor indeterminacy has a vast history in factor analysis Wil son Lederman Guttman It has lead to strong di erences in opinion Steiger The current paper gives necessary and su cient conditions for observability of factors in terms of the parameter matrices and a nite number of variables Five conditions are given which rigorously de ne indeterminacy It is shown that un observable...

A previous study on the underlying structure of the Wechsler intelligence test (WISC-R; [Wechsler, D. (1974). Manual WISCR: Wechsler intelligence scale for children—Revised. New York: Psychological Corporation]), using smallest space analysis (SSA) [Guttman, L., and Levy, S. (1991). Two structural laws for intelligence tests. Intelligence, 15, 79–103] had indicated a threedimensional cylindrica...

This paper adapts topic models to the psychometric testing of MOOC students based on their online forum postings. Measurement theory from education and psychology provides statistical models for quantifying a person’s attainment of intangible attributes such as attitudes, abilities or intelligence. Such models infer latent skill levels by relating them to individuals’ observed responses on a se...

This article examines the problem of specification error in 2 models for categorical latent variables; the latent class model and the latent Markov model. Specification error in the latent class model focuses on the impact of incorrectly specifying the number of latent classes of the categorical latent variable on measures of model adequacy as well as sample reallocation to latent classes. The ...

Penelitian ini bertujuan untuk mengetahui penerapan, kendala, upaya dalam melaksanakan Sistem Manajemen Keselamatan (SMK) di PO MTS. menggunakan 10 elemen SMK. Metode deskriftif kualitatif dengan penunjang data instrumen, observasi, wawancara skala guttman. Nilai guttman sebesar 95% yang berarti melebihi 50% sehingga dapat dinyatakan bahwa diperoleh selesai. Hasil penelitian menunjukan 8 SMK te...