Fieldhouse, A. E. A study of backwardness in singing among school children. Doctoral dissertation. London Univ., 1937.
3.
Frances, R., Lhermitte, F., and Verdy, M. F. Musical deficit among aphasics. International Review of Applied Psychology, 1973, 22(2), 117–136.
4.
Fry, D.An experimental study in tone-deafness.Speech, 1948, 12, 4–11.
5.
Goleman, D.Special abilities of the sexes: Do they begin in the brain?Psychology Today, 1978, 12, 32–44.
6.
Gould, A. O.Developing specialized programs for singing.Council for Research in Music Education Bulletin, 1969, 17, 17–24.
7.
Greer, R. D., Randall, A., and Timberlake, C.The discriminate use of music listening as a contingency for improvement in vocal pitch acuity and attending behavior.Council for Research in Music Education Bulletin, 1971, 26, 10–18.
8.
Ingram, T. T. S. Developmental disorders of speech. In Handbook of Clinical Neurology, Vol.4. P. J. Vinkin and G. W. Bruyn, editors. Amsterdam: North Holland Publishing Company, 1969, 407–442.
9.
Jones, M.Using a vertical-keyboard instrument with the uncertain singer.Journal of Research in Music Education, 1979, 27, 173–184.
10.
Joyner, D. R. The monotone problem. Journal of Research in Music Education, 1969, 17(1), 115–124.
11.
Klemish, J.Treating the uncertain singer through the use of the tape recorder.Council for Research in Music Education Bulletin, 1974, 37, 36–45.
12.
Roberts, E. Poor pitch singing: A survey of its incidence in school-children and its response to remedial training. M.A. thesis, Liverpool University, 1972.
13.
Shuter, R. Singing out of tune: A review of recent research on this problem and its educational implications. Scientific Aesthetics, 9, 1974.
14.
Shuter, R. The psychology of musical ability, 2nd edition. London: Metheun and Co. Ltd., 1981.
15.
Steinhagen, K. and Gutezeit, G. Comparative investigations in the auditory discrimination of dyslexic children. Praxis der Kinderpsychologie und Kinderpsychiatrie, 1971, 20(8), 284–291.