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T. L. Doolittle

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Publications by T. L. Doolittle (bibliography)

1989

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Doolittle, T. L. and Daniel, Barton (1989): Physical Demands of Bakery Workers. In: Proceedings of the Human Factors Society 33rd Annual Meeting 1989. pp. 682-686.

“Job analyses were conducted at three bakeries of a West Coast company to determine the metabolic and strength demands imposed upon the workers. The physically demanding tasks were consolidated into four job families. Masses, distances, frequencies and other data were obtained. From these it was determined that individuals were working at 3.5 to 4.0 METs continuously with peek efforts reaching 5 METs. Strength requirements exceeded the NIOSH action limit for some tasks. Preassignment screening standards were recommended as an administrative control.”

1988

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Doolittle, T. L., Spurlin, Oscar, Kaiyala, Karl and Sovern, Dennis (1988): Physical Demands of Lineworkers. In: Proceedings of the Human Factors Society 32nd Annual Meeting 1988. pp. 632-636.

“The occupational classification of electrical transmission lineworker was subjected to extensive job analyses. Physically demanding tasks, that were identified as being bona fide occupational requirements, were studied in depth to elucidate the specific forces necessary to perform them. The tasks were clustered by standard anatomical movements for lifting, pushing and hoisting. Five strength and three work simulation tests were developed to evaluate an individual's capacity for these movements. Ergonomic principles that relate the percentage of an individual's capacity to the frequency at which he or she may safely perform were employed in establishing scoring standards. Metabolic energy requirements were determined for those tasks having a high aerobic demand, and standards for performance were likewise established. Statistical analyses, comparing the test performance of 48 current lineworkers with job success criteria, revealed that the content valid test battery also possesses criterion-related validity.”

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