1. A source of variance in IQ unique to the lower-scoring monozygotic (MZ) cotwin

   • J. Michael Bailey
   • Joseph M. Horn

   OriginalPaper Pages: 509 - 516

2. Blood polymorphisms and cognitive abilities

   • Geoffrey C. Ashton

   OriginalPaper Pages: 517 - 529

3. Behavioral development in mice: Effects of maternal environment and the albino locus

   • Gilles Le Pape
   • Jean Michel Lassalle

   OriginalPaper Pages: 531 - 541

4. Emigration response behavior: III. Genetic variability in a natural population ofDrosophila busckii

   • Robert F. Rockwell
   • Louis Levine

   OriginalPaper Pages: 543 - 551

5. Behavior-genetic analysis of the paradise fish,Macropodus opercularis. II. Passive avoidance learning in inbred strains

   • Vilmos Csányi
   • Judit Gervai

   OriginalPaper Pages: 553 - 557

6. Single-locus control of sucrose octaacetate tasting among mice

   • Glayde Whitney
   • David B. Harder

   OriginalPaper Pages: 559 - 574

7. Some behavioral differences between strongly and weakly lateralized mice

   • Roger Ward
   • Luc Giguère
   • Michel St. Yves

   OriginalPaper Pages: 575 - 584