Research work for the evaluation and diagnosis of the mentally disabled in United States. A counselor counsels a couple. A mentally disabled child on a floor. A woman holds a toy in front of the child. Another mentally disabled child with his head bent. A woman talks to him. A person writes on a paper in front of an encephalography machine. The needles of an electroencephalogram (EEG) record on a paper. A boy with sensors of EEG attached to his ears. A mentally disabled child with headphones. A woman feeds the child. A machine and a bell on the table nearby. Dr David Zeaman, Professor of Psychology, University of Connecticut, talks about training of mentally disabled. A woman helps a child to paste features on a mask. A boy goes through a book. A mentally disabled girl Debra with a utensil stands near a plunger machine. Debra puts her hand in the slot of the plunger machine. Three boys near the plunger machines. A boy presses keys on a machine. Addition sums appear on a screen with four options given below. A child selects from the options.
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