REFERENCES
- Allen, J. P. (1989). Social impact of age mixing and age segregation in school: A context-sensitive investigation. Journal of Educational Psychology, 3, 408–416.
- American Association of School Administrators (AASBE). (1992). The nongraded primary: Making schools fit children. Arlington, VA: Author.
- Bredelkamp, S. (Ed.). (1987). Developmentally appropriate practices i n early childhood programs serving children from birth through age 8. Washington, DC: National Association for the Education of Young Children.
- Brown, L., Sherbenou, R. J., & Johnsen, S. K. (1990). Test of Nonverbal Intelligence, second edition: A language-free measure of cognitive ability. Austin, TX: Pro-Ed.
- Brownell, C. A. (1990). Peer social skills in toddlers: Competencies and constraints illustrated by same-age and mixed-age interaction. Child Development, 61, 838–848.
- Cohen, E. G., & Benton, J. (1988, Fall). Making group-work work. American Educator, 10–46.
- Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). New York: Academic Press.
- Coleman, M., Scribner, A. P., Johnsen, S., & Evans, M. K. (1993). A comparison between the Weschler Adult Intelligence Scale-Revised and the Test of Nonverbal Intelligence-2 with Mexican-American secondary students. Journal of Psychoeducational Assessment, 11, 250–258.
- Damon, W., & Phelps, E. (1989). Strategic uses of peer learning in children's education. In T. J. Berndt & G. W. Ladd (Eds.), Peer relationships in child development (pp. 135–157). New York: John Wiley & Sons.
- Eaton, W. O., & Enns, L. R. (1986). Differences in human motor activity level. Psychological Bulletin, 100, 19–28.
- Eaton, W. O., & Keats, J. G. (1982). Peer presence, stress, and differences in the motor activity levels of preschoolers. Developmental Psychology, 18, 534–540.
- Eaton, W. O., & Yu, A. P. (1989). Are differences in child motor activity level a function of differences in maturational status? Child Development, 60, 1005–1011.
- Elkind, D. (1989, October). Developmentally appropriate practice: Philosophical and practical implications. Phi Delta Kappan, 631–636.
- Epstein, J. L. (1989). The selection of friends: Changes across the grades and in different school environments. In T. J. Berndt & G. W. Ladd (Eds.), Peer relationships in child development (pp. 158–187). New York: John Wiley & Sons.
- Evangelou, D. (1989). Mixed-age groups in early childhood education. ERIC Digest. (EDO-PS-89-4)
- Fergusson, D. M., Lloyd, M., & Horwood, L. J. (1991). Teacher perceptions of performance of girls and boys. New England Journal of Educational Studies, 26, 155–163.
- Goodlad, J. I., & Anderson, R. H. (1987). The non-graded elementary school (revised ed.). New York: Columbia University Teachers' College.
- Gutierrez, R., & Slavin, R. E. (1992). Achievement effects of the nongraded elementary school: A best evidence synthesis. Review of Educational Research, 62(4), 333–376.
- Haddad, F. D. (1986). Concurrent validity of the Test of Nonverbal Intelligence with learning disabled children. Psychology in the Schools, 23, 361–364.
- Kammi, C. (Ed.). (1990). Achievement testing in the early grades: The games grown-ups play. Washington, DC: National Association for the Education of Young Children.
- Katz, L. G., Evangelou, D., & Hartman, J. A. (1991). The case for mixed-age grouping in early education. Washington, DC: National Association for the Education of Young Children.
- Kimball, M. M. (1989). A new perspective on women's math achievement. Psychological Bulletin, 105, 198–214.
- Kopp, C. B. (1982). Designing boredom out of instruction. Performance and Instruction, 21(4), 23–27.
- Ladd, G. W. (1990). Having friends, keeping friends, making friends, and being liked by peers in the classroom: Predictors of children's early school adjustment. Child Development, 61, 1081–1110.
- Lassiter, K. S., & Bardos, A. N. (1992). A comparison of learning disabled children's performance on the Test of Nonverbal Intelligence, K-ABC, and WISC-R. Journal of Psychoeducational Assessment, 10, 133–140.
- Lummis, M., & Stevenson, H. W. (1990). Gender differences in beliefs and achievement: A cross-cultural study. Developmental Psychology, 26, 254–263.
- Maccoby, E. E., & Jackiin, C. N. (1974). Myth, reality, and shades of gray: What we know and don't know about differences. Psychology Today, 8, 109–112.
- Merrell, K. W. (1991). Teacher ratings of social competence and behavioral adjustment: Differences between learning-disabled, low achieving, and typical students. Journal of School Psychology, 29, 207–217.
- Merrell, K. W., Sanders, D. E., & Popinga, M. R. (1993). Teacher ratings of student social behavior as a predictor of special education status: Discriminant validity of the School Social Behavior Scales. Journal of Psychoeducationai Assessment, 11, 220–231.
- Miller, B. A. (1990). A review of the qualitative research on multigrade instruction. Research in Rural Education, 7(1), 1–8.
- Miller, J. A., & Peterson, D. W. (1987). Peer-influenced academic interventions. In C. A. Maher & J. E. Zins (Eds.), Psychoeducationai interventions in the schools (pp. 81–100). New York: Pergamon Press.
- National Association for the Education of Young Children (NAEYC). (1991). Guidelines for appropriate curriculum content and assessment in programs serving children ages 3 through 8: A position statement of the National Association for the Education of Young Children and the National Association of Early Childhood Specialists in State Departments of Education. Young Children, 46(3), 21–38.
- Patterson, G. R., & Bank, I. (1986). Bootstrapping your way in the nomological thicket. Behavioral Assessment, 8, 49–73.
- Rooparnairne, J. L, Ahmeduzzaman, M., Donnely, S., Gill, P., Mennis, P., Arky, L, Dingler, K., McLaughlin, M., & Talukder, E. (1992). Social-Cognitive play behaviors and playmate preferences in same-age and mixed-age classrooms over a 6-month period. American Educational Research Journal, 29, 757–776.
- Ross, D. M., & Ross, S. A. (1982). Hyperactivity: Current issues, research, and theory (2nd ed.). New York: Wiley.
- Sabers, D., Cushing, K., & Sabers, D. (1987). Differences in reading and mathematics achievement for middle school students. Journal of Early Adolescents, 7, 117–128.
- Sakoda, J. M., Cohen, B. H., & Beall, G. (1954). Test of significance for a series of statistical tests. Psychological Bulletin, 51, 172–175.
- Sater, D. M., & French, D. C. (1989). A comparison of the social competencies of learning-disabled and low-achieving elementary-age children. Journal of Special Education, 23, 29–42.
- Small, M. Y. (1990). Cognitive development. New York: Harcourt, Brace, Jovanovich.
- Teltsch, T., & Brezniz, Z. (1988). The effects of school entrance age on academic achievement and social-emotional adjustment of children. Journal of Genetic Psychology, 149, 471–483.
- The Psychological Corporation. (1992). The Weschler Individualized Achievement Test: Screener. San Antonio, TX: Harcourt, Brace, Jovanovich, Inc.
- Urberg, K. A., & Kaplan, M. G. (1986). Effects of classroom age composition on the play and social behaviors of preschool children. Journal of Applied Developmental Psychology, 7, 403–415.
- Vance, B. (1988). Concurrent validity of the Quick Test, the Test of Nonverbal Intelligence, and the WISC-R for a sample of special education students. Psychological Reports, 62, 443–446.
- Walker, H. M., & McConnell, S. R. (1988). The Walker-McConnell Scale of Social Competence and Adjustment: A social skills rating scale for teachers. Austin, TX: Pro-Ed.
- Weiner, D. H., & Weiner, C. L (1986). Integrating success. Gifted Child Today, 10, 143–158.