This study examined the factor structure of the Wechsler Intelligence Scale for Children-Fifth Edition (WISC-V) with four standardization sample age groups (6-8, 9-11, 12-14, 15-16 years) using exploratory factor analysis (EFA), multiple factor extraction criteria, and hierarchical EFA not included in the WISC-V Technical and Interpretation Manual. Factor extraction criteria suggested that one to four factors might be sufficient despite the publisher-promoted, five-factor solution. Forced extraction of five factors resulted in only one WISC-V subtest obtaining a salient pattern coefficient on the fifth factor in all four groups, rendering it inadequate. Evidence did not support the publisher's desire to split Perceptual Reasoning into separate Visual Spatial and Fluid Reasoning dimensions. Results indicated that most WISC-V subtests were properly associated with the four theoretically oriented first-order factors resembling the WISC-IV, the g factor accounted for large portions of total and common variance, and the four first-order group factors accounted for small portions of total and common variance. Results were consistent with EFA of the WISC-V total standardization sample. K E Y W O R D S exploratory factor analysis, factor extraction criteria, Schmid-Leiman higher-order analysis, structural validity, WISC-V The Wechsler Intelligence Scale for Children-Fifth Edition (WISC-V; Wechsler, 2014a) includes 16 intelligence-related subtests, five first-order factor index scores (Verbal Comprehension [VC], Visual Spatial [VS], Fluid Reasoning [FR], Working Memory [WM], and Processing Speed [PS]), and the hierarchically ordered Full Scale score (FSIQ). The Word Reasoning and Picture Completion subtests of the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV; Wechsler, 2003) were removed and three new subtests were added. New subtests include Picture Span (adapted from Psychol Schs. 2018;55:741-769.wileyonlinelibrary.com/journal/pits
