PubMed Health⌕ Search

Biomedical subjects

M C Payne

Publications and source records attributed to M C Payne.

12 recordsLinked to original sources
PubMed1985

Effects of range on category scaling of loudness judgments.

In two experiments subjects judged the loudness of a 1000-Hz tone within a range of three loudnesses. The first used a within-subjects design with ranges of 1-2 sones, 1-4 sones, and 1-8 sones. The second used a between-subjects design with ranges of 1-2 sones, 1-8 sones, and 1-16 sones. Except for two values in the 1- to 2-sone range the two experiments produced comparable results. As range was increased the tendency to round away from the end points increased and the judged mid-point occurred at a higher value. Comparisons are made with rounding patterns that occur in studies of linear scales. The present results are interpreted to support Poulton's (1975) position, that the mid-point of subjective estimates depends on the range of stimuli judged, rather than that of Stevens (1975), that the mid-point on a prosthetic scale is assigned to a value that is lower than the mid-point on the subject's subjective scale.

Acoustic Stimulation↗
PubMed1985

Legionnaires' disease in the Caribbean. An outbreak associated with a resort hotel.

Outbreaks of legionnaires' disease (LD) in tourists visiting Italian and Spanish resorts have been recently reported. An unusual number of reports of LD in tourists visiting the US Virgin Islands prompted an investigation of risk factors for development of LD in this area. Twenty-seven cases of LD were identified between 1979 and 1982 through press reports, personal communication, the national LD surveillance system, a review of hospital records, and a mail survey. Twenty-four of 27 persons with the disease had visited St Croix and 12 of them had stayed at a single hotel in 1981. Available evidence suggested that infection was due to Legionella pneumophila serogroup 1; L pneumophila serogroups 1 and 3 and several new Legionella species were isolated from the potable water system at the hotel. Following hyperchlorination of the potable water system, no further cases of LD in hotel visitors have been identified to date.

Disease Outbreaks↗
PubMed1981

Effects of noise frequency on performance and annoyance for women and men.

Effects of noise frequencies on both performance on a complex psychomotor task and annoyance were investigated for men (n = 30) and women (n = 30). Each subject performed a complex psychomotor task for 50 min. in the presence of low frequency noise, high frequency noise, or ambient noise. Women and men learned the task at different rates. Little effect of noise was shown. Annoyance ratings were subsequently obtained from each subject for noise of various frequencies by the method of magnitude estimation. High frequency noises were more annoying than low frequency noises regardless of sex and immediate prior exposure to noise. Sex differences in annoyance did not occur. Not direct relationship between learning to perform a complex task while exposed to noise and annoyance by that noise was demonstrated.

Adolescent↗