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On a shortened method of estimation of mental factors by regression
Ledermann, Walter - In: Psychometrika 4 (1939) 2, pp. 109-116
Persistent link: https://www.econbiz.de/10005381536
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Some mathematical remarks concerning boundary conditions in the factorial analysis of ability
Ledermann, Walter - In: Psychometrika 1 (1936) 3, pp. 165-174
Persistent link: https://www.econbiz.de/10005381872
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On the rank of the reduced correlational matrix in multiple-factor analysis
Ledermann, Walter - In: Psychometrika 2 (1937) 2, pp. 85-93
Persistent link: https://www.econbiz.de/10005757897