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Effects of the label "mentally retarded" and a child's reaction to punishment on the severity of punishment administered by college students and fourth graders were examined using a video tape of an acting-out child in a classroom. Forty males and 40 females in each age group viewed one of four video tapes that were identical, with the exception of a(More)
Median Lethal Concentration. A statistically derived concentration of a substance that can be expected to cause death in 50% of test animals. It is usually expressed as the weight of substance per weight or volume of water, air or feed, e.g., mg/l, mg/kg or ppm. LD 50 Median Lethal Dose. A statistically derived single dose that can be expected to cause(More)
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