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Biomedical subjects

M Bouffard

Publications and source records attributed to M Bouffard.

4 recordsLinked to original sources
PubMed1998

Standard versus modified bio-electrical impedance analysis on reactance measurements.

The purpose of this investigation was to compare score consistency of the observed reactance measurements for total body composition bio-electrical impedance analysis (BIA), using standard and modified electrode placement procedures. Subjects were 80 military males (19-56 years) who volunteered from Elmendorf Air Force Base, Anchorage, Alaska. The RJL Systems Spectrum Lightweight Instrument was used. RJL's rules were followed for standard procedure, and the proximal electrode sites were changed for the modified procedure. The hand and foot proximal electrodes were placed in the center of the antecubital space and popliteal fossa, respectively. The study used a four-faceted crossed, random effects design. The object of measurement was person, and facets of generalization were day, occasion, and trial. Data were analyzed independently for each electrode placement procedure. The analysis revealed: 1) person contributed the largest source of systematic variance, as expected, and 2) person x day interaction accounted for the significant percentage of unwanted measurement error for both electrode placement procedures. The relative and absolute coefficients of the G-studies (80 persons x 2 days x 2 occasions x 3 trials) were 0.86 for standard and 0.83 for modified. The D-studies (111, 211, 311, and 511) revealed relative and absolute coefficients which ranged from 0.75 to 0.94 for standard, 0.67 to 0.91 for relative, and 0.67 to 0.90 absolute for modified. The G-coefficients (G study and D studies) for reactance measurements showed the standard electrode placement procedure produced more consistent scores than the modified proximal electrode placement procedure. In conclusion, generalizability analysis on reactance scores demonstrated the standard electrode placement procedure still to be superior over the modified electrode placement procedure.

Adolescent↗
PubMed1993

Children's self-regulated learning of movement sequences.

The purpose of this study was to determine whether developmental differences exist in childrens' use of self-regulatory strategies while learning supra-memory-span movement sequences. Grade 1 and Grade 4 children were asked to study two movement sequences long enough to be absolutely certain that they would be able to recall the entire sequences correctly. The older group displayed superior recall readiness in comparison to the younger group. Older children used a greater variety of strategies and also displayed significantly greater numbers of strategy orchestration patterns. In addition, Grade 4 children more frequently used overt encoding and self-checking strategies. Further, evidence suggests that Grade 4 children used language to encode movement components or to regulate their own learning more frequently than Grade 1 children.

Age Factors↗
PubMed1992

Coping by individuals with physical disabilities with perceived challenge in physical activity: are people consistent?

This study examined coping and affective experience to perceived challenge in physical activity settings in 30 individuals with physical disabilities in three separate situations over 6 months. On every occasion, each individual was asked to report the most challenging physical activity of the preceding week and indicate how he or she coped with the challenge and what affective states were experienced. Coping was measured using a modification of Carver, Scheier, and Weintraub's (1989) COPE inventory. Self-reported mood was assessed using the Positive Affect Negative Affect Schedule (Watson, Clark, & Tellegen, 1988). The data indicated that perceived challenge was characterized by high levels of positive affect. Generalizability theory, used to determine the relative stability of coping strategies, indicated that individuals with physical disabilities did not consistently use the same coping skill strategies across settings.

Adaptation, Psychological↗