Chunk #15 — METHODS — Factor Analyses and Internal Consistency

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Reliability and validity of an internalizing symptom scale based on the adolescent and adult Semi-Structured Assessment for the Genetics of Alcoholism (SSAGA).

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Since the unidimensionality assumption was met, we calculated ordinal standardized α,45 a statistic more appropriate than Cronbach’s α for assessing internal consistency of scales in which individual item scores are ordinal.21,46,47