Showing papers by "Richard D. Gill published in 1978"
TL;DR: In this paper, the Guttman criterion is advocated as a measure of factor indeterminacy, and two types of factors are defined: the number of factors, the specific variances and the factor loadings.
Abstract: This paper reviews indeterminacy problems for the factor analysis model and their consequences for the interpretation of the results. Two types of indeterminacy are discerned: indeterminacy of the parameters in the model (the number of factors, the specific variances and the factorloadings) and the indeterminacy of the factors, given the parameters in the model. It is argued that parameter indeterminacy is partly to be overcome, provided that a strong underlying theory for the subject matter under research is present. Factor indeterminacy remains a major stumbling‐block for the interpretation of results. The Guttman criterion is advocated as a measure of factor indeterminacy. Copyright
15 citations
TL;DR: In this article, the authors reported that the rise in electron temperature is consistent with the added neutral-injection power and that the heating occurs without an increase in impurity level in the plasma.
Abstract: Neutral-injection heating experiments are reported in which an ion temperature increase of 52% and a central electron temperature increase of 75% were observed. It is shown that the rise in electron temperature is consistent with the added neutral-injection power and that the heating occurs without an increase in impurity level in the plasma.
2 citations