Abstract
Two sets of written materials about physical activity were developed, one promoting lifestyle exercise and the other promoting structured exercise. Both sets integrated the Transtheoretical Model of behavior-change concepts. Materials were evaluated by 8 women and 6 men (M age = 63.1 yr.) using a stratified (by gender) randomized group design. Participants evaluated the materials on 8 factors of a standardized instrument. Cronbach alpha was .97. No significant differences were found between the two sets of materials on the 8 factors evaluated. Effect size differences ranged from .16 to .84 (M =.46).