- James, William, 1842-1910 (5)
- Open University (3)
- Annett, John (2)
- Butler, Gillian (2)
- McManus, Freda (2)
- Morris, P. E. (Peter Edwin), 1947- (2)
- Vygotskiĭ, L. S. (Lev Semenovich), 1896-1934 (2)
- Wertsch, James V., 1947- (2)
- Adler, Mortimer Jerome, 1902- (1)
- Blum, Milton L., 1912- (1)
- Bowers, Fredson Thayer, 1905-1991 (1)
- Bronckart, Jean-Paul, 1946- (1)
- Burkhardt, Frederick, 1912- (1)
- Buxton, Claude E. (1)
- Chein, Isidor (1)
- Cronan-Hillix, W. A. (William Allen), 1927- (1)
- Crutchfield, Richard S. (1)
- Encyclopaedia Britannica (1)
- Fordham, Frieda (1)
- Fredrickson, Barbara L. (1)
- Galanter, Eugene (1)
- Gross, Richard D. (1)
- Hilgard, Ernest Ropiequet, 1904- (1)
- Holloway, Clive (1)
- Hutt, Max L. (1)
- Isaacson, Robert Lee, 1928- (1)
- Krech, David (1)
- Livson, Norman, 1924- (1)
- Loftus, Geoffrey R. (1)
- Lutz, Christel (1)
- Marx, Melvin Herman (1)
- Miller, Paul R. (1)
- Mounoud, Pierre (1)
- Munn, Norman Leslie, 1902- (1)
- Nolen-Hoeksema, Susan, 1959- (1)
- Piaget, Jean, 1896-1980 (1)
- Rieber, R. W. (Robert W.) (1)
- Rollin, Robert A. (1)
- Ruch, Floyd Leon, 1903- (1)
- Skrupskelis, Ignas K., 1938- (1)
- Smedslund, Jan (1)
- Staats, Arthur W. (1)
- Staats, Carolyn K. (1)
- Valsiner, Jaan (1)
- Veer, René van der, 1952- (1)
- Wilson, William A., Jr. (1)