1. Genetic and environmental influences on item response pattern scalability

   • Niels G. Waller
   • Steven P. Reise

   OriginalPaper Pages: 135 - 152

2. Differential heritability across levels of cognitive ability

   • S. S. Cherny
   • L. R. Cardon
   • J. C. DeFries

   OriginalPaper Pages: 153 - 162

3. Maternal influences on infant hand-use during play with toys

   • George F. Michel

   OriginalPaper Pages: 163 - 176

4. Differences in one-way active avoidance learning in mice of three inbred strains

   • Susan B. Weinberger
   • George F. Koob
   • Joe L. Martinez Jr.

   OriginalPaper Pages: 177 - 188

5. Foreword

   • George P. Vogler

   EditorialNotes Pages: 191 - 191

6. Simulated twin data on substance abuse

   • Gregory Carey

   OriginalPaper Pages: 193 - 196

7. The relationship between age at first drug use and teenage drug use liability

   • Joanne M. Meyer
   • Michael C. Neale

   OriginalPaper Pages: 197 - 213

8. Likelihood-based analyses of longitudinal twin and family data: Experiences with pedigree-based approaches

   • Christopher J. Williams
   • Richard Viken
   • Richard J. Rose

   OriginalPaper Pages: 215 - 223

9. The Colorado Adoption Project: General cognitive ability and height data at ages 1 to 4 years

   • Robin P. Corley

   OriginalPaper Pages: 225 - 228

10. Quantitative genetic analysis of IQ development in young children: Multivariate multiple regression with orthogonal polynomials

    • Irwin D. Waldman
    • J. C. DeFries
    • David W. Fulker

    OriginalPaper Pages: 229 - 238

11. Using EQS for a simple analysis of the Colorado Adoption Project data on height and intelligence

    • John C. Loehlin

    OriginalPaper Pages: 239 - 245

12. The Dutch twin register: Growth data on weight and height

    • D. I. Boomsma
    • J. F. Orlebeke
    • G. C. M. van Baal

    OriginalPaper Pages: 247 - 251

13. Biometrical analysis of individual growth curves

    • Laura A. Baker
    • Chandra Reynolds
    • Erin Phelps

    OriginalPaper Pages: 253 - 264