INFANT AND PRESCHOOL MENTAL AND VERBAL-ABILITIES - HOW ARE INFANT SCORES RELATED TO PRESCHOOL SCORES

The present study examined two different systems for creating subscale s for the Bayley Mental Development Index. The purpose was to determin e how performance on Bayley MDI subscales at 1 and 2 years of age is r elated to performance on the Standford-Binet IV at 3 through 5 years o f age. The purpose was also to determine how the correlations for glob al and specific skill scores change as time intervals between assessme nt points increase. The results show that first year MDI and subscale scores were weak correlates of two-year MDI and subscale scores and pr eschool scores on the Stanford-Binet. Stronger correlations were found between two-year scores and Stanford-Binet IQ and Verbal Reasoning sc ores. The data show similar stabilities between the measures of global functioning (MDI and IQ), and between early and later measures of ver bal abilities beginning after 2 years of age.