TABLE 2.

Mean Verbal Scale Subtest Scores, Measured With the WPPSI-R, According to Conception Mode

ScoreStatistical Analysis*
ICSIIVFNC
MeanSDMeanSDMeanSD
Information (n = 1363)11.702.7811.372.2911.672.73NS
Comprehension (n = 1358)10.962.6910.882.3910.952.51P < .05
Arithmetic (n = 1363)10.242.4710.622.6010.542.54P < .05
Vocabulary (n = 1363)12.422.7912.392.7912.412.75P < .05§
Similarities (n = 1360)11.203.5010.993.2711.573.28NS
  • * Three-way analysis of variance (conception mode × country × gender and conception mode × educational level × age of the mother at the time of the birth). NS indicates nonsignificant (P > .05).

  • Significant conception mode-age of the mother at the time of the birth interaction effect.

  • Significant conception mode-country interaction effect.

  • § Significant conception mode-gender interaction effect and conception mode-educational level of the mother interaction effect.