Coping with participant heterogeneity in dichotomous responses.
Participant heterogeneity induces spurious dependence that may obscure dependence patterns displayed by a covariance matrix. A parsimonious method is proposed for the reduction of this confounding effect. The method is applied to dichotomous behavioral response data of participants diagnosed with schizophrenia, as assessed by the Pragmatic Protocol (J. Speech Hear. Disord. 1987; 52:105-119).
Meilijson
Isaac
I
School of Mathematical Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel.
Meilijson
Sara
S
D015986:Confounding Factors, Epidemiologic; D003627:Data Interpretation, Statistical; D006801:Humans; D007802:Language; D012559:Schizophrenia; D012720:Severity of Illness Index