[Vitamin E as a possible aid in the control of disease problems on pig farms: a field test].

In two sow-herds problems with weaning-diarrhoea and Streptococcus suis meningitis were successfully controlled by strategic use of antibiotics during the post-weaning period. In an attempt to reduce the intake of antibiotics by farm animals, the vitamin E level in the post-weaning diet was increased from 20 IE/kg to 80 IE/kg, because vitamin E is thought to increase resistance. The effect on both farms was stunning, so a small field trial was started.

Sign and symbol in children's processing of familiar auditory stimuli.

The perceptual-linguistic stimulus distinction for auditory stimuli was examined. In Study 1, stimulus recognition was tested, and serial recall was tested in Study 2. Stimuli were sounds (perceptual condition) and the corresponding words (linguistic condition) for 49 familiar events, in within-subjects designs.

Errorless discrimination and picture fading as techniques for teaching sight words to TMR students.

The effectiveness of two approaches for teaching beginning sight words to 30 TMR students was compared. In Dorry and Zeaman's picture-fading technique, words are taught through association with pictures that are faded out over a series of trials, while in the Edmark program errorless-discrimination technique, words are taught through shaped sequences of visual and auditory--visual matching-to-sample, with the target word first appearing alone and eventually appearing with orthographically similar words. Students were instructed on two lists of 10 words each, one list in the picture-fading and one in the discrimination method, in a double counter-balanced, repeated-measures design.