Blank, M., Rose, S.A. & Berlin, L.J. (1978). PLAI. the Language of Learning in Practice (New York: Grune & Stratton).
2.
Cronbach, L.J. (1982). Designing Evaluations of Educational and Social Programmes (San Francisco: Jossey-Bass ).
3.
Dunn, L.M. (1979). 'Peabody Picture Vocabulary Test - Revised' Circle Pines, MN.: (American Guidance Service ).
4.
Feagans, L. & Farran, D. (1979). Adaptive Language Inventory. Unpublished, University of North Carolina atChapel Hill.
5.
Harms, T. & Clifford, R.M. (1980). 'Early Childhood Environment Rating Scales' (New York: Teachers College Press).
6.
McCartney, K. (in press). The effect of quality of day care environment upon children's language development. To appear in Developmental Psychology .
7.
McCartney, K., Scarr, S., Phillips, D. & Grajek, S. (manuscript in preparation). The issue of quality in day care intervention programmes.
8.
McCartney, K., Scarr, S., Phillips, D., Grajek, S. & Schwarz, J.C. (1982). Environmental differences among day care centres and their effects on children's development. In E. F. Zigler & E. W. Gordon (eds), Day Care: Scientific and Social Policy Issues ( Boston, Mass.: Auburn House).
9.
Norc Survey (1978). 'Occupational Classification' ( Chicago: University of Chicago Press).
10.
Ramey, C.T. & Haskins, R. (1981). The modification of intelligence through early experience, Intelligence, 5, 5-19.