Prevalence of tenosynovitis and other injuries of the upper extremities in repetitive work.

The purpose of this investigation was to compare the prevalence of soft tissue disorders in the neck, arms and hands between packers doing repetitive work and shop assistants with variable tasks. One hundred and fifty-two female assembly-line packers in a food production factory and 133 female shop assistants were interviewed about their symptoms and given a clinical examination of the neck and upper extremities. The number of cases of tension neck, cervical syndrome, scalenus syndrome, and humeral epicondylitis did not differ significantly between the two groups.

Lack of effect on the chromosomal non-disjunction in aged female mice after low dose X-irradiation.

Karyotypes were determined in 1064 embryos of aged C57/BL mothers. The virgin female mice were irradiated with 0, 4, 8 or 16 R of X-rays, respectively, and placed with young untreated males 5 days after irradiation. 10.

An experimental analysis of some procedures to teach priming and reinforcement skills to preschool teachers.

This Monograph reports the results of teaching preschool teachers to be successful at increasing desired behaviors of their children, thus becoming successful teachers. Five teacher-training techniques were examined experimentally under single-subject designs: written assignments, feedback from viewing graphs, on-the-spot feedback from a wireless radio (Bug-in-the-Ear), feedback from an observer, and self-counting. Those teaching procedures that included prompt and frequent information to the teacher about the behavior under study were the most effective techniques.

Lack of synergistic effect between X-ray and UV irradiation on the frequency of chromosome aberrations in PHA-stimulated human lymphocytes in the G1 stage.

PHA-stimulated human lymphocytes in the G1 stage were irradiated with UV radiation and X-rays, and the cells were analyzed for chromosomal aberrations in the first mitotic division. The frequency of dicentric chromosomes after single X-irradiation in the G1 stage was about twice the yield in the G0 stage. No increase in the yield of dicentrics was observed after combined irradiation with UV and X-rays.

Genetic effects of acute and chronic irradiation with 14 MeV neutrons.

Male CBA mice were exposed to 14.5 MeV neutron, either in an acute (150 or 250 rad) or a chronic dose (250 rad) and the genetic effects of the irradiations were compared. No detectable difference in the rate of mutations existed between acute and chronic exposure, with these neutrons.

Differential reinforcement of other behavior and noncontingent reinforcement as control procedures during the modification of a preschooler's compliance.

Differential reinforcement of other behavior (DRO) and noncontingent reinforcement were compared as control procedures during the modification of a 3-yr-old preschooler's compliance. The recorded reinforcer was teacher proximity (within 3 ft (0.9) of the subject for at least 5 sec) which was often accompanied by positive verbal comments that varied in content across experimental conditions.