Limited speech in all situation. Expressive language [what is said] is significantly below receptive language. [what is understood]; the latter is usually average occurs in 10% to 15% of children younger than 3years of age and is almost five times as likely to affect boys as girls.
An unfounded psychological explanation is that the children's parents may not speak to them enough. A biological theory is that middle ear infection is a contributory cause.
• Some cases may be self-correcting.
David H. Barlow, BOSTON UNIVERSITY
V. Mark Durand, UNIVERSITY OF SOUTH FLORIDA- ST. PETERSBERG
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Davision G.C., Neale, J.M. and Kring, A.M.
3. ABNORMAL PSYCHOLOGY
Allov. L.B.: Riskind, J.H. and Manos, M.J.
4. ABNORMAL PSYCHOLOGY AND MODERN LIFE. NY: Harper and Collins. 2000
Carson. R.C. and Butcher. N.J.