Table 5. Quadratic and Piecewise Analysis Results

School readiness skillsNICHD SECCYD quadECLS-K quadNICHD SECCYD-piecewiseECLS-K piecewiseSummary
Lang/knowledge*Strong predictor with some evidence of very modest catch-up for reading, math, language- both considered alone and with other SR variables *modest predictor of externalizing and social skills when considered alone*Strong predictor with some evidence of very modest catch-up for reading, math, language- both considered alone and with other SR variables*modest predictor of externalizing and social skills when considered alone*Moderate predictor in normal range of level on reading, math, language- both considered alone and with other SR vars *modest predictor in normal range of social skills when considered alone*stronger prediction innormal range of level for reading and math but bigger gains over time in low range for math when considered alone and of reading when considered with other SR variables*modest prediction of social skills and externalizing- both when considered along and with other SR variables* Evidence of stronger prediction of level in normal range for reading, math, and language * some evidence of modest reduction in ach gap over time for reading, math, and language* modest predictor of social outcomes
Reading*Strong predictor with some evidence of very modest catch-up for reading, math, language- both considered alone and with other SR variables *modest predictor of externalizing and social skills when considered alone and together*Strong predictor with some evidence of very modest catch-up for reading, math, language- both considered alone and with other SR variables *modest predictor of externalizing and social skills and some very modest evidence of catch up when considered alone*Moderate predictor in normal range of level on reading, math, languageboth considered alone and with other SR variables *modest predictor in normal range of social skills when considered alone*stronger prediction in normal range of level for reading but bigger gains over time in low range for reading and math when considered alone and with other SR variables *modest prediction of social skills and externalizing- both when considered along* Evidence of stronger prediction of level in normal range for reading, math, and language * some evidence of modest reduction in ach gap over time for reading, math, and language* modest predictor of social outcomes
Math*Strong predictor with some evidence of very modest catch-up for reading, math, language- both considered alone and with other SR variables*modest predictor of externalizing and social skills when considered alone*Strong predictor with some evidence of very modest catch-up for reading, math, language, externalizing- both considered alone and with other SR variables*modest predictor of social skills and some very modest evidence of catch up when considered alone*Moderate predictor in normal range of level on reading, math,languageboth considered alone and with other SR varibles *modest predictor in normal range of social skills & externalizing with some very modest evidence of catch up in the low range when considered alone*stronger prediction in normal range of level for reading and math but bigger gains over time in low range when considered alone and for math with other SR variables*modest prediction of social skills and externalizing- both when considered along with other SR variables* Evidence of stronger prediction of level in normal range for reading, math, and language* some evidence of modest reduction in ach gap over time for reading, math, and language* modest predictor of social outcomes
Social Skills*Modest predictor of reading, math, language when considered alone*modest predictor of social skills and externalizing with some evidence of bigger differences over time*Modest predictor of reading, math, language when considered alone*moderate predictor of social skills and externalizing with some evidence of bigger differences over time- when considered alone and with other SR variables*Modest predictor in normal range of level on reading, math,language- when considered alone*Moderate predictor in normal range of social skills & externalizing with some very modest evidence of catch up in the low range when considered alone*stronger prediction in normal range of level for reading ,math, and externalizing when considered alone*modest prediction of reading, math, and externalizing when considered along with other SR variables*Modest predictor of reading, math, language when considered alone*moderate predictor of social skills and externalizing with some evidence of bigger differences over time- when considered alone and with other SR variables
App to Learning* Modest predictor level and reading, math, language, social skills, externalizing when considered alone and of level in reading, language, externalizing, social skills when considered together*modest predictor with some evidence of very modest catch-up for reading, math, language, social skills externalizing- both considered alone and with other SR variables*Modest predictor in normal range of level on reading, math, language, social skills, and externalizing when considered alone and with other SR variables*modest predictor in normal range of social skills & externalizing with some very modest evidence of catch up in the low range when considered with other SR variabl*stronger prediction in normal range of level for reading, math, social skills, and externalizing but bigger gains over time in low range for reading when considered alone and of level for externalizing when considered with other SR variables*modest prediction of math, reading and externalizing when considered along with other SR variables*Modest predictor in normal range of level on reading, math,language, social skills, and externalizing when considered alone and with other SR variables*modest predictor in normal range of social skills & externalizing with some very modest evidence of catch up in the low range when considered with other SR variables
Attention (CPT)*Modest predictor of level on reading, math,language, social skills, and externalizing when considered alone and with other SR variables for ext, and social skills* THRESHOLD? Some evidence of disproportionately higher levels of math skills if start school with higher attention skills, but slower rates of gains over time with higher skills *Modest predictor in normal range of level on reading, math,language, social skills, and externalizing when considered alone and with other SR variables for math, ext, and social skills  
HealthLittle associationLittle associationNo associationModest predictor when considered alone, but not with other SR variables